diff --git a/beacon_chain/beacon_chain_db_immutable.nim b/beacon_chain/beacon_chain_db_immutable.nim
index 013106dc8..73af2fd36 100644
--- a/beacon_chain/beacon_chain_db_immutable.nim
+++ b/beacon_chain/beacon_chain_db_immutable.nim
@@ -19,7 +19,7 @@ from ./spec/datatypes/capella import
 from ./spec/datatypes/eip4844 import ExecutionPayloadHeader
 
 type
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beaconstate
   # Memory-representation-equivalent to a phase0 BeaconState for in-place SSZ reading and writing
   Phase0BeaconStateNoImmutableValidators* = object
     # Versioning
@@ -70,7 +70,7 @@ type
     current_justified_checkpoint*: Checkpoint
     finalized_checkpoint*: Checkpoint
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#beaconstate
   # Memory-representation-equivalent to an Altair BeaconState for in-place SSZ
   # reading and writing
   AltairBeaconStateNoImmutableValidators* = object
@@ -127,7 +127,7 @@ type
     current_sync_committee*: SyncCommittee     # [New in Altair]
     next_sync_committee*: SyncCommittee        # [New in Altair]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#beaconstate
   # Memory-representation-equivalent to a Bellatrix BeaconState for in-place SSZ
   # reading and writing
   BellatrixBeaconStateNoImmutableValidators* = object
diff --git a/beacon_chain/beacon_clock.nim b/beacon_chain/beacon_clock.nim
index cf5c05c8c..1a904c1a8 100644
--- a/beacon_chain/beacon_clock.nim
+++ b/beacon_chain/beacon_clock.nim
@@ -29,7 +29,7 @@ type
     ## which blocks are valid - in particular, blocks are not valid if they
     ## come from the future as seen from the local clock.
     ##
-    ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#fork-choice
+    ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#fork-choice
     ##
     # TODO consider NTP and network-adjusted timestamps as outlined here:
     #      https://ethresear.ch/t/network-adjusted-timestamps/4187
diff --git a/beacon_chain/consensus_object_pools/README.md b/beacon_chain/consensus_object_pools/README.md
index 292426b2e..183d3fd3f 100644
--- a/beacon_chain/consensus_object_pools/README.md
+++ b/beacon_chain/consensus_object_pools/README.md
@@ -4,12 +4,12 @@ This folder holds the various consensus object pools needed for a blockchain cli
 
 Object in those pools have passed the "gossip validation" filter according
 to specs:
-- blocks: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#beacon_block
-- aggregate attestations: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
-- unaggregated attestation: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
-- voluntary exits: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#voluntary_exit
-- Attester slashings: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#attester_slashing
-- Proposer slashings: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#proposer_slashing
+- blocks: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#beacon_block
+- aggregate attestations: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
+- unaggregated attestation: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
+- voluntary exits: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#voluntary_exit
+- Attester slashings: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#attester_slashing
+- Proposer slashings: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#proposer_slashing
 
 After "gossip validation" the consensus objects can be rebroadcasted as they are optimistically good, however for internal processing further verification is needed.
 For blocks, this means verifying state transition and all contained cryptographic signatures (instead of just the proposer signature).
diff --git a/beacon_chain/consensus_object_pools/attestation_pool.nim b/beacon_chain/consensus_object_pools/attestation_pool.nim
index 7562f9234..29bd005ea 100644
--- a/beacon_chain/consensus_object_pools/attestation_pool.nim
+++ b/beacon_chain/consensus_object_pools/attestation_pool.nim
@@ -565,7 +565,7 @@ proc getAttestationsForBlock*(pool: var AttestationPool,
                               cache: var StateCache): seq[Attestation] =
   ## Retrieve attestations that may be added to a new block at the slot of the
   ## given state
-  ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#attestations
+  ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#attestations
   let newBlockSlot = state.data.slot.uint64
 
   if newBlockSlot < MIN_ATTESTATION_INCLUSION_DELAY:
@@ -753,7 +753,7 @@ func getAggregatedAttestation*(pool: var AttestationPool,
                                index: CommitteeIndex): Opt[Attestation] =
   ## Select the attestation that has the most votes going for it in the given
   ## slot/index
-  ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#construct-aggregate
+  ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#construct-aggregate
   let candidateIdx = pool.candidateIdx(slot)
   if candidateIdx.isNone:
     return Opt.none(Attestation)
@@ -783,7 +783,7 @@ proc getBeaconHead*(
     finalizedExecutionPayloadHash =
       pool.dag.loadExecutionBlockRoot(pool.dag.finalizedHead.blck)
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/fork_choice/safe-block.md#get_safe_execution_payload_hash
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/fork_choice/safe-block.md#get_safe_execution_payload_hash
     safeBlockRoot = pool.forkChoice.get_safe_beacon_block_root()
     safeBlock = pool.dag.getBlockRef(safeBlockRoot)
     safeExecutionPayloadHash =
diff --git a/beacon_chain/consensus_object_pools/block_dag.nim b/beacon_chain/consensus_object_pools/block_dag.nim
index 23914ba50..32b6a72a4 100644
--- a/beacon_chain/consensus_object_pools/block_dag.nim
+++ b/beacon_chain/consensus_object_pools/block_dag.nim
@@ -130,7 +130,7 @@ func link*(parent, child: BlockRef) =
 func get_ancestor*(blck: BlockRef, slot: Slot,
     maxDepth = 100'i64 * 365 * 24 * 60 * 60 div SECONDS_PER_SLOT.int):
     BlockRef =
-  ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#get_ancestor
+  ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#get_ancestor
   ## Return the most recent block as of the time at `slot` that not more recent
   ## than `blck` itself
   if isNil(blck): return nil
diff --git a/beacon_chain/consensus_object_pools/block_pools_types.nim b/beacon_chain/consensus_object_pools/block_pools_types.nim
index d2c141ec3..fdb6fae52 100644
--- a/beacon_chain/consensus_object_pools/block_pools_types.nim
+++ b/beacon_chain/consensus_object_pools/block_pools_types.nim
@@ -238,7 +238,7 @@ type
       ## committee messages will be rejected
 
     optimisticRoots*: HashSet[Eth2Digest]
-      ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/sync/optimistic.md#helpers
+      ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/sync/optimistic.md#helpers
 
   EpochKey* = object
     ## The epoch key fully determines the shuffling for proposers and
diff --git a/beacon_chain/consensus_object_pools/blockchain_dag.nim b/beacon_chain/consensus_object_pools/blockchain_dag.nim
index 871437351..3202d86ed 100644
--- a/beacon_chain/consensus_object_pools/blockchain_dag.nim
+++ b/beacon_chain/consensus_object_pools/blockchain_dag.nim
@@ -1646,7 +1646,7 @@ proc pruneBlocksDAG(dag: ChainDAGRef) =
     prunedHeads = hlen - dag.heads.len,
     dagPruneDur = Moment.now() - startTick
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/sync/optimistic.md#helpers
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/sync/optimistic.md#helpers
 template is_optimistic*(dag: ChainDAGRef, root: Eth2Digest): bool =
   root in dag.optimisticRoots
 
@@ -2270,7 +2270,7 @@ proc aggregateAll*(
     # Aggregation spec requires non-empty collection
     # - https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-04
     # Eth2 spec requires at least one attesting index in attestation
-    # - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+    # - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
     return err("aggregate: no attesting keys")
 
   let
diff --git a/beacon_chain/consensus_object_pools/consensus_manager.nim b/beacon_chain/consensus_object_pools/consensus_manager.nim
index 45bec560b..f0bcd5684 100644
--- a/beacon_chain/consensus_object_pools/consensus_manager.nim
+++ b/beacon_chain/consensus_object_pools/consensus_manager.nim
@@ -178,7 +178,7 @@ proc runForkchoiceUpdated*(
   # block hash provided by this event is stubbed with
   # `0x0000000000000000000000000000000000000000000000000000000000000000`."
   # and
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/validator.md#executionpayload
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/validator.md#executionpayload
   # notes "`finalized_block_hash` is the hash of the latest finalized execution
   # payload (`Hash32()` if none yet finalized)"
   doAssert not headBlockRoot.isZero
diff --git a/beacon_chain/consensus_object_pools/spec_cache.nim b/beacon_chain/consensus_object_pools/spec_cache.nim
index 8c4170b7b..fec05027b 100644
--- a/beacon_chain/consensus_object_pools/spec_cache.nim
+++ b/beacon_chain/consensus_object_pools/spec_cache.nim
@@ -28,7 +28,7 @@ logScope: topics = "spec_cache"
 func count_active_validators*(shufflingRef: ShufflingRef): uint64 =
   shufflingRef.shuffled_active_validator_indices.lenu64
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_committee_count_per_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_committee_count_per_slot
 func get_committee_count_per_slot*(shufflingRef: ShufflingRef): uint64 =
   get_committee_count_per_slot(count_active_validators(shufflingRef))
 
@@ -41,7 +41,7 @@ func get_committee_index*(shufflingRef: ShufflingRef, index: uint64):
     Result[CommitteeIndex, cstring] =
   check_attestation_index(index, get_committee_count_per_slot(shufflingRef))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_beacon_committee
 iterator get_beacon_committee*(
     shufflingRef: ShufflingRef, slot: Slot, committee_index: CommitteeIndex):
     (int, ValidatorIndex) =
@@ -54,7 +54,7 @@ iterator get_beacon_committee*(
     committees_per_slot * SLOTS_PER_EPOCH
   ): yield (index_in_committee, idx)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_beacon_committee
 func get_beacon_committee*(
     shufflingRef: ShufflingRef, slot: Slot, committee_index: CommitteeIndex):
     seq[ValidatorIndex] =
@@ -67,7 +67,7 @@ func get_beacon_committee*(
     committees_per_slot * SLOTS_PER_EPOCH
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_beacon_committee
 func get_beacon_committee_len*(
     shufflingRef: ShufflingRef, slot: Slot, committee_index: CommitteeIndex): uint64 =
   ## Return the number of members in the beacon committee at ``slot`` for ``index``.
@@ -79,7 +79,7 @@ func get_beacon_committee_len*(
     committees_per_slot * SLOTS_PER_EPOCH
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_attesting_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_attesting_indices
 iterator get_attesting_indices*(shufflingRef: ShufflingRef,
                                 slot: Slot,
                                 committee_index: CommitteeIndex,
@@ -158,7 +158,7 @@ func get_attesting_indices_one*(shufflingRef: ShufflingRef,
     res = some(validator_index)
   res
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_attesting_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_attesting_indices
 func get_attesting_indices*(shufflingRef: ShufflingRef,
                             slot: Slot,
                             committee_index: CommitteeIndex,
@@ -184,7 +184,7 @@ func makeAttestationData*(
 
   doAssert current_epoch == epochRef.epoch
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#attestation-data
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#attestation-data
   AttestationData(
     slot: slot,
     index: committee_index.asUInt64,
@@ -194,7 +194,7 @@ func makeAttestationData*(
       epoch: current_epoch,
       root: epoch_boundary_block.blck.root))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#validator-assignments
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#validator-assignments
 iterator get_committee_assignments*(
     shufflingRef: ShufflingRef, validator_indices: HashSet[ValidatorIndex]):
     tuple[committee_index: CommitteeIndex,
diff --git a/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim b/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim
index c6173ff00..81dfb4794 100644
--- a/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim
+++ b/beacon_chain/consensus_object_pools/sync_committee_msg_pool.nim
@@ -298,7 +298,7 @@ proc produceSyncAggregate*(
 
 proc isEpochLeadTime*(
     pool: SyncCommitteeMsgPool, epochsToSyncPeriod: uint64): bool =
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#sync-committee-subnet-stability
   # This ensures a uniform distribution without requiring additional state:
   # (1/4)                         = 1/4, 4 slots out
   # (3/4) * (1/3)                 = 1/4, 3 slots out
diff --git a/beacon_chain/eth1/eth1_monitor.nim b/beacon_chain/eth1/eth1_monitor.nim
index fe941dd6f..06b7a2084 100644
--- a/beacon_chain/eth1/eth1_monitor.nim
+++ b/beacon_chain/eth1/eth1_monitor.nim
@@ -220,11 +220,11 @@ template toGaugeValue(x: Quantity): int64 =
 #  doAssert SECONDS_PER_ETH1_BLOCK * cfg.ETH1_FOLLOW_DISTANCE < GENESIS_DELAY,
 #             "Invalid configuration: GENESIS_DELAY is set too low"
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#get_eth1_data
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#get_eth1_data
 func compute_time_at_slot(genesis_time: uint64, slot: Slot): uint64 =
   genesis_time + slot * SECONDS_PER_SLOT
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#get_eth1_data
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#get_eth1_data
 func voting_period_start_time(state: ForkedHashedBeaconState): uint64 =
   let eth1_voting_period_start_slot =
     getStateField(state, slot) - getStateField(state, slot) mod
@@ -232,7 +232,7 @@ func voting_period_start_time(state: ForkedHashedBeaconState): uint64 =
   compute_time_at_slot(
     getStateField(state, genesis_time), eth1_voting_period_start_slot)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#get_eth1_data
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#get_eth1_data
 func is_candidate_block(cfg: RuntimeConfig,
                         blk: Eth1Block,
                         period_start: uint64): bool =
@@ -948,7 +948,7 @@ template trackFinalizedState*(m: Eth1Monitor,
                               finalizedStateDepositIndex: uint64): bool =
   trackFinalizedState(m.depositsChain, finalizedEth1Data, finalizedStateDepositIndex)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#get_eth1_data
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#get_eth1_data
 proc getBlockProposalData*(chain: var Eth1Chain,
                            state: ForkedHashedBeaconState,
                            finalizedEth1Data: Eth1Data,
diff --git a/beacon_chain/eth1/merkle_minimal.nim b/beacon_chain/eth1/merkle_minimal.nim
index ed8b710b3..d2fd1bf5e 100644
--- a/beacon_chain/eth1/merkle_minimal.nim
+++ b/beacon_chain/eth1/merkle_minimal.nim
@@ -10,7 +10,7 @@ when (NimMajor, NimMinor) < (1, 4):
 else:
   {.push raises: [].}
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/tests/core/pyspec/eth2spec/utils/merkle_minimal.py
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/tests/core/pyspec/eth2spec/utils/merkle_minimal.py
 
 # Merkle tree helpers
 # ---------------------------------------------------------------
diff --git a/beacon_chain/fork_choice/README.md b/beacon_chain/fork_choice/README.md
index 217d6e849..5579bdde2 100644
--- a/beacon_chain/fork_choice/README.md
+++ b/beacon_chain/fork_choice/README.md
@@ -1,5 +1,5 @@
 # Fork choice implementations
 
 References:
-- https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md
+- https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md
 - https://github.com/protolambda/lmd-ghost
diff --git a/beacon_chain/fork_choice/fork_choice.nim b/beacon_chain/fork_choice/fork_choice.nim
index b7156d53e..89c2a0cde 100644
--- a/beacon_chain/fork_choice/fork_choice.nim
+++ b/beacon_chain/fork_choice/fork_choice.nim
@@ -86,7 +86,7 @@ func extend[T](s: var seq[T], minLen: int) =
   if s.len < minLen:
     s.setLen(minLen)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#should_update_justified_checkpoint
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#should_update_justified_checkpoint
 func should_update_justified_checkpoint(
     self: var Checkpoints, dag: ChainDAGRef,
     new_justified_checkpoint: Checkpoint): FcResult[bool] =
@@ -140,7 +140,7 @@ proc update_justified(
   self.update_justified(dag, blck, justified.epoch)
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#on_block
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#on_block
 proc update_checkpoints(
     self: var Checkpoints, dag: ChainDAGRef,
     checkpoints: FinalityCheckpoints): FcResult[void] =
@@ -163,7 +163,7 @@ proc update_checkpoints(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#on_tick
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#on_tick
 proc on_tick(
     self: var ForkChoice, dag: ChainDAGRef, time: BeaconTime): FcResult[void] =
   ## Must be called at least once per slot.
@@ -292,7 +292,7 @@ proc on_attestation*(
       block_root: beacon_block_root))
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#on_attester_slashing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#on_attester_slashing
 func process_equivocation*(
        self: var ForkChoice,
        validator_index: ValidatorIndex
@@ -308,7 +308,7 @@ func process_equivocation*(
     trace "Integrating equivocation in fork choice",
       validator_index
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#on_block
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#on_block
 func process_block*(self: var ForkChoiceBackend,
                     block_root: Eth2Digest,
                     parent_root: Eth2Digest,
@@ -421,7 +421,7 @@ proc get_head*(self: var ForkChoice,
     self.checkpoints.justified.balances,
     self.checkpoints.proposer_boost_root)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/fork_choice/safe-block.md#get_safe_beacon_block_root
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/fork_choice/safe-block.md#get_safe_beacon_block_root
 func get_safe_beacon_block_root*(self: ForkChoice): Eth2Digest =
   # Use most recent justified block as a stopgap
   self.checkpoints.justified.checkpoint.root
diff --git a/beacon_chain/fork_choice/proto_array.nim b/beacon_chain/fork_choice/proto_array.nim
index c1de180c5..923d30228 100644
--- a/beacon_chain/fork_choice/proto_array.nim
+++ b/beacon_chain/fork_choice/proto_array.nim
@@ -533,7 +533,7 @@ func nodeLeadsToViableHead(self: ProtoArray, node: ProtoNode): FcResult[bool] =
 
 func nodeIsViableForHead(self: ProtoArray, node: ProtoNode): bool =
   ## This is the equivalent of `filter_block_tree` function in eth2 spec
-  ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#filter_block_tree
+  ## https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#filter_block_tree
 
   if node.invalid:
     return false
diff --git a/beacon_chain/gossip_processing/README.md b/beacon_chain/gossip_processing/README.md
index 41e0d890f..f3eb7beb7 100644
--- a/beacon_chain/gossip_processing/README.md
+++ b/beacon_chain/gossip_processing/README.md
@@ -9,12 +9,12 @@ This folder holds a collection of modules to:
 
 Gossip validation is different from consensus verification in particular for blocks.
 
-- Blocks: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#beacon_block
-- Attestations (aggregated): https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
-- Attestations (unaggregated): https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#attestation-subnets
-- Voluntary exits: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#voluntary_exit
-- Proposer slashings: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#proposer_slashing
-- Attester slashing: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#attester_slashing
+- Blocks: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#beacon_block
+- Attestations (aggregated): https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
+- Attestations (unaggregated): https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#attestation-subnets
+- Voluntary exits: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#voluntary_exit
+- Proposer slashings: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#proposer_slashing
+- Attester slashing: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#attester_slashing
 
 There are multiple consumers of validated consensus objects:
 - a `ValidationResult.Accept` output triggers rebroadcasting in libp2p
diff --git a/beacon_chain/gossip_processing/block_processor.nim b/beacon_chain/gossip_processing/block_processor.nim
index 471e70ef0..e73220561 100644
--- a/beacon_chain/gossip_processing/block_processor.nim
+++ b/beacon_chain/gossip_processing/block_processor.nim
@@ -639,7 +639,7 @@ proc processBlock(
     # - MUST NOT optimistically import the block.
     # - MUST NOT apply the block to the fork choice store.
     # - MAY queue the block for later processing.
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/sync/optimistic.md#execution-engine-errors
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/sync/optimistic.md#execution-engine-errors
     await sleepAsync(chronos.seconds(1))
     self[].addBlock(
       entry.src, entry.blck, entry.blobs, entry.resfut, entry.validationDur)
diff --git a/beacon_chain/gossip_processing/gossip_validation.nim b/beacon_chain/gossip_processing/gossip_validation.nim
index 814d928cc..87e519371 100644
--- a/beacon_chain/gossip_processing/gossip_validation.nim
+++ b/beacon_chain/gossip_processing/gossip_validation.nim
@@ -96,7 +96,7 @@ func check_propagation_slot_range(
   let
     pastSlot = (wallTime - MAXIMUM_GOSSIP_CLOCK_DISPARITY).toSlot()
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#configuration
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#configuration
   # The spec value of ATTESTATION_PROPAGATION_SLOT_RANGE is 32, but it can
   # retransmit attestations on the cusp of being out of spec, and which by
   # the time they reach their destination might be out of spec.
@@ -182,7 +182,7 @@ template validateBeaconBlockBellatrix(
     parent: BlockRef): untyped =
   discard
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/p2p-interface.md#beacon_block
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/p2p-interface.md#beacon_block
 template validateBeaconBlockBellatrix(
        signed_beacon_block: bellatrix.SignedBeaconBlock |
        capella.SignedBeaconBlock | eip4844.SignedBeaconBlock,
@@ -308,7 +308,7 @@ proc validateBeaconBlock*(
   # proposer for the slot, signed_beacon_block.message.slot.
   #
   # While this condition is similar to the proposer slashing condition at
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#proposer-slashing
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#proposer-slashing
   # it's not identical, and this check does not address slashing:
   #
   # (1) The beacon blocks must be conflicting, i.e. different, for the same
@@ -818,7 +818,7 @@ proc validateAggregate*(
 
   return ok((attesting_indices, sig))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#attester_slashing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#attester_slashing
 proc validateAttesterSlashing*(
     pool: ExitPool, attester_slashing: AttesterSlashing):
     Result[void, ValidationError] =
@@ -841,7 +841,7 @@ proc validateAttesterSlashing*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#proposer_slashing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#proposer_slashing
 proc validateProposerSlashing*(
     pool: ExitPool, proposer_slashing: ProposerSlashing):
     Result[void, ValidationError] =
@@ -864,7 +864,7 @@ proc validateProposerSlashing*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#voluntary_exit
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#voluntary_exit
 proc validateVoluntaryExit*(
     pool: ExitPool, signed_voluntary_exit: SignedVoluntaryExit):
     Result[void, ValidationError] =
@@ -894,7 +894,7 @@ proc validateVoluntaryExit*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/p2p-interface.md#sync_committee_subnet_id
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/p2p-interface.md#sync_committee_subnet_id
 proc validateSyncCommitteeMessage*(
     dag: ChainDAGRef,
     batchCrypto: ref BatchCrypto,
diff --git a/beacon_chain/networking/eth2_network.nim b/beacon_chain/networking/eth2_network.nim
index c11637e39..d98b53264 100644
--- a/beacon_chain/networking/eth2_network.nim
+++ b/beacon_chain/networking/eth2_network.nim
@@ -174,7 +174,7 @@ type
   MounterProc* = proc(network: Eth2Node) {.gcsafe, raises: [Defect, CatchableError].}
   MessageContentPrinter* = proc(msg: pointer): string {.gcsafe, raises: [Defect].}
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#goodbye
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#goodbye
   DisconnectionReason* = enum
     # might see other values on the wire!
     ClientShutDown = 1
@@ -2249,8 +2249,8 @@ proc getPersistentNetKeys*(
 
 func gossipId(
     data: openArray[byte], phase0Prefix, topic: string): seq[byte] =
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#topics-and-messages
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/p2p-interface.md#topics-and-messages
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#topics-and-messages
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/p2p-interface.md#topics-and-messages
   const
     MESSAGE_DOMAIN_INVALID_SNAPPY = [0x00'u8, 0x00, 0x00, 0x00]
     MESSAGE_DOMAIN_VALID_SNAPPY = [0x01'u8, 0x00, 0x00, 0x00]
@@ -2515,7 +2515,7 @@ proc broadcast(node: Eth2Node, topic: string, msg: auto):
 
 proc subscribeAttestationSubnets*(
     node: Eth2Node, subnets: AttnetBits, forkDigest: ForkDigest) =
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#attestations-and-aggregation
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#attestations-and-aggregation
   # Nimbus won't score attestation subnets for now, we just rely on block and
   # aggregate which are more stable and reliable
 
@@ -2526,7 +2526,7 @@ proc subscribeAttestationSubnets*(
 
 proc unsubscribeAttestationSubnets*(
     node: Eth2Node, subnets: AttnetBits, forkDigest: ForkDigest) =
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#attestations-and-aggregation
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#attestations-and-aggregation
   # Nimbus won't score attestation subnets for now; we just rely on block and
   # aggregate which are more stable and reliable
 
@@ -2535,15 +2535,15 @@ proc unsubscribeAttestationSubnets*(
       node.unsubscribe(getAttestationTopic(forkDigest, SubnetId(subnet_id)))
 
 proc updateStabilitySubnetMetadata*(node: Eth2Node, attnets: AttnetBits) =
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#metadata
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#metadata
   if node.metadata.attnets == attnets:
     return
 
   node.metadata.seq_number += 1
   node.metadata.attnets = attnets
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#phase-0-attestation-subnet-stability
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#attestation-subnet-bitfield
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#phase-0-attestation-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#attestation-subnet-bitfield
   let res = node.discovery.updateRecord({
     enrAttestationSubnetsField: SSZ.encode(node.metadata.attnets)
   })
@@ -2555,7 +2555,7 @@ proc updateStabilitySubnetMetadata*(node: Eth2Node, attnets: AttnetBits) =
     debug "Stability subnets changed; updated ENR attnets", attnets
 
 proc updateSyncnetsMetadata*(node: Eth2Node, syncnets: SyncnetBits) =
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#sync-committee-subnet-stability
   if node.metadata.syncnets == syncnets:
     return
 
@@ -2596,7 +2596,7 @@ proc broadcastAttestation*(
     node: Eth2Node, subnet_id: SubnetId, attestation: Attestation):
     Future[SendResult] =
   # Regardless of the contents of the attestation,
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/p2p-interface.md#transitioning-the-gossip
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/p2p-interface.md#transitioning-the-gossip
   # implies that pre-fork, messages using post-fork digests might be
   # ignored, whilst post-fork, there is effectively a seen_ttl-based
   # timer unsubscription point that means no new pre-fork-forkdigest
diff --git a/beacon_chain/nimbus_beacon_node.nim b/beacon_chain/nimbus_beacon_node.nim
index 5d49c4eaa..e0a17a40e 100644
--- a/beacon_chain/nimbus_beacon_node.nim
+++ b/beacon_chain/nimbus_beacon_node.nim
@@ -716,7 +716,7 @@ func forkDigests(node: BeaconNode): auto =
     node.dag.forkDigests.eip4844]
   forkDigestsArray
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#phase-0-attestation-subnet-stability
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#phase-0-attestation-subnet-stability
 proc updateAttestationSubnetHandlers(node: BeaconNode, slot: Slot) =
   if node.gossipState.card == 0:
     # When disconnected, updateGossipState is responsible for all things
@@ -1367,7 +1367,7 @@ proc installRestHandlers(restServer: RestServerRef, node: BeaconNode) =
 from ./spec/datatypes/capella import SignedBeaconBlock
 
 proc installMessageValidators(node: BeaconNode) =
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#attestations-and-aggregation
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#attestations-and-aggregation
   # These validators stay around the whole time, regardless of which specific
   # subnets are subscribed to during any given epoch.
   let forkDigests = node.dag.forkDigests
diff --git a/beacon_chain/rpc/rest_config_api.nim b/beacon_chain/rpc/rest_config_api.nim
index 6253f5ddc..66111944d 100644
--- a/beacon_chain/rpc/rest_config_api.nim
+++ b/beacon_chain/rpc/rest_config_api.nim
@@ -22,7 +22,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
     cachedConfigSpec =
       RestApiResponse.prepareJsonResponse(
         (
-          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/phase0.yaml
+          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/phase0.yaml
           MAX_COMMITTEES_PER_SLOT:
             Base10.toString(MAX_COMMITTEES_PER_SLOT),
           TARGET_COMMITTEE_SIZE:
@@ -90,7 +90,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           MAX_VOLUNTARY_EXITS:
             Base10.toString(MAX_VOLUNTARY_EXITS),
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/altair.yaml
+          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/altair.yaml
           INACTIVITY_PENALTY_QUOTIENT_ALTAIR:
             Base10.toString(INACTIVITY_PENALTY_QUOTIENT_ALTAIR),
           MIN_SLASHING_PENALTY_QUOTIENT_ALTAIR:
@@ -106,7 +106,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           UPDATE_TIMEOUT:
             Base10.toString(UPDATE_TIMEOUT),
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/bellatrix.yaml
+          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/bellatrix.yaml
           INACTIVITY_PENALTY_QUOTIENT_BELLATRIX:
             Base10.toString(INACTIVITY_PENALTY_QUOTIENT_BELLATRIX),
           MIN_SLASHING_PENALTY_QUOTIENT_BELLATRIX:
@@ -182,7 +182,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           DEPOSIT_CONTRACT_ADDRESS:
             $cfg.DEPOSIT_CONTRACT_ADDRESS,
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#constants
+          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#constants
           # GENESIS_SLOT
           # GENESIS_EPOCH
           # FAR_FUTURE_EPOCH
@@ -209,7 +209,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           DOMAIN_AGGREGATE_AND_PROOF:
             to0xHex(DOMAIN_AGGREGATE_AND_PROOF.data),
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#constants
+          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#constants
           TIMELY_SOURCE_FLAG_INDEX:
             to0xHex([byte(TIMELY_SOURCE_FLAG_INDEX)]),
           TIMELY_TARGET_FLAG_INDEX:
@@ -236,7 +236,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
             to0xHex(DOMAIN_CONTRIBUTION_AND_PROOF.data),
           # PARTICIPATION_FLAG_WEIGHTS
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#constants
+          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#constants
           TARGET_AGGREGATORS_PER_COMMITTEE:
             Base10.toString(TARGET_AGGREGATORS_PER_COMMITTEE),
           RANDOM_SUBNETS_PER_VALIDATOR:
@@ -246,7 +246,7 @@ proc installConfigApiHandlers*(router: var RestRouter, node: BeaconNode) =
           ATTESTATION_SUBNET_COUNT:
             Base10.toString(ATTESTATION_SUBNET_COUNT),
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#constants
+          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#constants
           TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE:
             Base10.toString(uint64(TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE)),
           SYNC_COMMITTEE_SUBNET_COUNT:
diff --git a/beacon_chain/spec/beacon_time.nim b/beacon_chain/spec/beacon_time.nim
index 7d1292e6a..04b791993 100644
--- a/beacon_chain/spec/beacon_time.nim
+++ b/beacon_chain/spec/beacon_time.nim
@@ -46,7 +46,7 @@ const
   GENESIS_SLOT* = Slot(0)
   GENESIS_EPOCH* = Epoch(0) # compute_epoch_at_slot(GENESIS_SLOT)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#constant
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#constant
   INTERVALS_PER_SLOT* = 3
 
   FAR_FUTURE_BEACON_TIME* = BeaconTime(ns_since_genesis: int64.high())
@@ -139,16 +139,16 @@ template `+`*(a: TimeDiff, b: Duration): TimeDiff =
 const
   # Offsets from the start of the slot to when the corresponding message should
   # be sent
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#attesting
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#attesting
   attestationSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64 div INTERVALS_PER_SLOT)
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#broadcast-aggregate
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#broadcast-aggregate
   aggregateSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64  * 2 div INTERVALS_PER_SLOT)
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#prepare-sync-committee-message
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#prepare-sync-committee-message
   syncCommitteeMessageSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64  div INTERVALS_PER_SLOT)
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#broadcast-sync-committee-contribution
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#broadcast-sync-committee-contribution
   syncContributionSlotOffset* = TimeDiff(nanoseconds:
     NANOSECONDS_PER_SLOT.int64  * 2 div INTERVALS_PER_SLOT)
   # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/light-client/p2p-interface.md#sync-committee
@@ -188,13 +188,13 @@ func slotOrZero*(time: BeaconTime): Slot =
   if exSlot.afterGenesis: exSlot.slot
   else: Slot(0)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#compute_epoch_at_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#compute_epoch_at_slot
 func epoch*(slot: Slot): Epoch = # aka compute_epoch_at_slot
   ## Return the epoch number at ``slot``.
   if slot == FAR_FUTURE_SLOT: FAR_FUTURE_EPOCH
   else: Epoch(slot div SLOTS_PER_EPOCH)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#compute_slots_since_epoch_start
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#compute_slots_since_epoch_start
 func since_epoch_start*(slot: Slot): uint64 = # aka compute_slots_since_epoch_start
   ## How many slots since the beginning of the epoch (`[0..SLOTS_PER_EPOCH-1]`)
   (slot mod SLOTS_PER_EPOCH)
@@ -202,14 +202,14 @@ func since_epoch_start*(slot: Slot): uint64 = # aka compute_slots_since_epoch_st
 template is_epoch*(slot: Slot): bool =
   slot.since_epoch_start == 0
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#compute_start_slot_at_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#compute_start_slot_at_epoch
 func start_slot*(epoch: Epoch): Slot = # aka compute_start_slot_at_epoch
   ## Return the start slot of ``epoch``.
   const maxEpoch = Epoch(FAR_FUTURE_SLOT div SLOTS_PER_EPOCH)
   if epoch >= maxEpoch: FAR_FUTURE_SLOT
   else: Slot(epoch * SLOTS_PER_EPOCH)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_previous_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_previous_epoch
 func get_previous_epoch*(current_epoch: Epoch): Epoch =
   ## Return the previous epoch (unless the current epoch is ``GENESIS_EPOCH``).
   if current_epoch == GENESIS_EPOCH:
@@ -222,7 +222,7 @@ iterator slots*(epoch: Epoch): Slot =
   for slot in start_slot ..< start_slot + SLOTS_PER_EPOCH:
     yield slot
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#sync-committee
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#sync-committee
 template sync_committee_period*(epoch: Epoch): SyncCommitteePeriod =
   if epoch == FAR_FUTURE_EPOCH: FAR_FUTURE_PERIOD
   else: SyncCommitteePeriod(epoch div EPOCHS_PER_SYNC_COMMITTEE_PERIOD)
diff --git a/beacon_chain/spec/beaconstate.nim b/beacon_chain/spec/beaconstate.nim
index d24162bbc..b6ada8aa4 100644
--- a/beacon_chain/spec/beaconstate.nim
+++ b/beacon_chain/spec/beaconstate.nim
@@ -26,7 +26,7 @@ from ./datatypes/capella import BeaconState, ExecutionPayloadHeader, Withdrawal
 
 export extras, forks, validator
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#increase_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#increase_balance
 func increase_balance*(balance: var Gwei, delta: Gwei) =
   balance += delta
 
@@ -36,7 +36,7 @@ func increase_balance*(
   if delta != 0: # avoid dirtying the balance cache if not needed
     increase_balance(state.balances.mitem(index), delta)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#decrease_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#decrease_balance
 func decrease_balance*(balance: var Gwei, delta: Gwei) =
   balance =
     if delta > balance:
@@ -51,8 +51,8 @@ func decrease_balance*(
   if delta != 0: # avoid dirtying the balance cache if not needed
     decrease_balance(state.balances.mitem(index), delta)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#deposits
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#modified-process_deposit
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#deposits
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#modified-process_deposit
 func get_validator_from_deposit*(deposit: DepositData):
     Validator =
   let
@@ -70,13 +70,13 @@ func get_validator_from_deposit*(deposit: DepositData):
     effective_balance: effective_balance
   )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#compute_activation_exit_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#compute_activation_exit_epoch
 func compute_activation_exit_epoch*(epoch: Epoch): Epoch =
   ## Return the epoch during which validator activations and exits initiated in
   ## ``epoch`` take effect.
   epoch + 1 + MAX_SEED_LOOKAHEAD
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_validator_churn_limit
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_validator_churn_limit
 func get_validator_churn_limit*(
       cfg: RuntimeConfig, state: ForkyBeaconState, cache: var StateCache):
     uint64 =
@@ -86,7 +86,7 @@ func get_validator_churn_limit*(
     count_active_validators(
       state, state.get_current_epoch(), cache) div cfg.CHURN_LIMIT_QUOTIENT)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#initiate_validator_exit
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#initiate_validator_exit
 func initiate_validator_exit*(
     cfg: RuntimeConfig, state: var ForkyBeaconState,
     index: ValidatorIndex, cache: var StateCache): Result[void, cstring] =
@@ -137,9 +137,9 @@ func initiate_validator_exit*(
 
 from ./datatypes/eip4844 import BeaconState
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#modified-slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#modified-slash_validator
 func get_slashing_penalty*(state: ForkyBeaconState,
                            validator_effective_balance: Gwei): Gwei =
   # TODO Consider whether this is better than splitting the functions apart; in
@@ -154,15 +154,15 @@ func get_slashing_penalty*(state: ForkyBeaconState,
   else:
     {.fatal: "invalid BeaconState type".}
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#modified-slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#modified-slash_validator
 func get_whistleblower_reward*(validator_effective_balance: Gwei): Gwei =
   validator_effective_balance div WHISTLEBLOWER_REWARD_QUOTIENT
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#modified-slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#modified-slash_validator
 func get_proposer_reward(state: ForkyBeaconState, whistleblower_reward: Gwei): Gwei =
   when state is phase0.BeaconState:
     whistleblower_reward div PROPOSER_REWARD_QUOTIENT
@@ -172,9 +172,9 @@ func get_proposer_reward(state: ForkyBeaconState, whistleblower_reward: Gwei): G
   else:
     {.fatal: "invalid BeaconState type".}
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#modified-slash_validator
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#modified-slash_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#modified-slash_validator
 proc slash_validator*(
     cfg: RuntimeConfig, state: var ForkyBeaconState,
     slashed_index: ValidatorIndex, cache: var StateCache):
@@ -226,7 +226,7 @@ proc slash_validator*(
 func genesis_time_from_eth1_timestamp*(cfg: RuntimeConfig, eth1_timestamp: uint64): uint64 =
   eth1_timestamp + cfg.GENESIS_DELAY
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#genesis
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#genesis
 proc initialize_beacon_state_from_eth1*(
     cfg: RuntimeConfig,
     eth1_block_hash: Eth2Digest,
@@ -328,7 +328,7 @@ proc initialize_hashed_beacon_state_from_eth1*(
       cfg, eth1_block_hash, eth1_timestamp, deposits, flags))
   result.root = hash_tree_root(result.data)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#genesis-block
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#genesis-block
 func get_initial_beacon_block*(state: phase0.HashedBeaconState):
     phase0.TrustedSignedBeaconBlock =
   # The genesis block is implicitly trusted
@@ -340,7 +340,7 @@ func get_initial_beacon_block*(state: phase0.HashedBeaconState):
   phase0.TrustedSignedBeaconBlock(
     message: message, root: hash_tree_root(message))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#initialize-state-for-pure-altair-testnets-and-test-vectors
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#initialize-state-for-pure-altair-testnets-and-test-vectors
 func get_initial_beacon_block*(state: altair.HashedBeaconState):
     altair.TrustedSignedBeaconBlock =
   # The genesis block is implicitly trusted
@@ -392,7 +392,7 @@ func get_initial_beacon_block*(state: ForkedHashedBeaconState):
   withState(state):
     ForkedTrustedSignedBeaconBlock.init(get_initial_beacon_block(forkyState))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_block_root_at_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_block_root_at_slot
 func get_block_root_at_slot*(state: ForkyBeaconState, slot: Slot): Eth2Digest =
   ## Return the block root at a recent ``slot``.
 
@@ -410,7 +410,7 @@ func get_block_root_at_slot*(
   withState(state):
     get_block_root_at_slot(forkyState.data, slot)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_block_root
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_block_root
 func get_block_root*(state: ForkyBeaconState, epoch: Epoch): Eth2Digest =
   ## Return the block root at the start of a recent ``epoch``.
   get_block_root_at_slot(state, epoch.start_slot())
@@ -420,7 +420,7 @@ func get_block_root*(state: ForkedHashedBeaconState, epoch: Epoch): Eth2Digest =
   withState(state):
     get_block_root(forkyState.data, epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_total_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_total_balance
 template get_total_balance(
     state: ForkyBeaconState, validator_indices: untyped): Gwei =
   ## Return the combined effective balance of the ``indices``.
@@ -431,13 +431,13 @@ template get_total_balance(
     res += state.validators[validator_index].effective_balance
   max(EFFECTIVE_BALANCE_INCREMENT, res)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#is_eligible_for_activation_queue
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#is_eligible_for_activation_queue
 func is_eligible_for_activation_queue*(validator: Validator): bool =
   ## Check if ``validator`` is eligible to be placed into the activation queue.
   validator.activation_eligibility_epoch == FAR_FUTURE_EPOCH and
     validator.effective_balance == MAX_EFFECTIVE_BALANCE
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#is_eligible_for_activation
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#is_eligible_for_activation
 func is_eligible_for_activation*(
     state: ForkyBeaconState, validator: Validator): bool =
   ## Check if ``validator`` is eligible for activation.
@@ -447,7 +447,7 @@ func is_eligible_for_activation*(
   # Has not yet been activated
     validator.activation_epoch == FAR_FUTURE_EPOCH
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
 proc is_valid_indexed_attestation*(
     state: ForkyBeaconState, indexed_attestation: SomeIndexedAttestation,
     flags: UpdateFlags): Result[void, cstring] =
@@ -485,7 +485,7 @@ proc is_valid_indexed_attestation*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_attesting_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_attesting_indices
 func get_attesting_indices*(state: ForkyBeaconState,
                             data: AttestationData,
                             bits: CommitteeValidatorsBits,
@@ -550,7 +550,7 @@ proc is_valid_indexed_attestation*(
 
 # Attestation validation
 # ------------------------------------------------------------------------------------------
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#attestations
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#attestations
 # https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.2/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
 
 func check_attestation_slot_target*(data: AttestationData): Result[Slot, cstring] =
@@ -593,7 +593,7 @@ func check_attestation_index*(
     Result[CommitteeIndex, cstring] =
   check_attestation_index(data.index, committees_per_slot)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_attestation_participation_flag_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_attestation_participation_flag_indices
 func get_attestation_participation_flag_indices(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
            eip4844.BeaconState,
@@ -628,7 +628,7 @@ func get_attestation_participation_flag_indices(
 # TODO these duplicate some stuff in state_transition_epoch which uses TotalBalances
 # better to centralize around that if feasible
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_total_active_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_total_active_balance
 func get_total_active_balance*(state: ForkyBeaconState, cache: var StateCache): Gwei =
   ## Return the combined effective balance of the active validators.
   # Note: ``get_total_balance`` returns ``EFFECTIVE_BALANCE_INCREMENT`` Gwei
@@ -644,7 +644,7 @@ func get_total_active_balance*(state: ForkyBeaconState, cache: var StateCache):
     cache.total_active_balance[epoch] = tab
     return tab
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_base_reward_per_increment
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_base_reward_per_increment
 func get_base_reward_per_increment_sqrt*(
     total_active_balance_sqrt: uint64): Gwei =
   EFFECTIVE_BALANCE_INCREMENT * BASE_REWARD_FACTOR div total_active_balance_sqrt
@@ -653,7 +653,7 @@ func get_base_reward_per_increment*(
     total_active_balance: Gwei): Gwei =
   get_base_reward_per_increment_sqrt(integer_squareroot(total_active_balance))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_base_reward
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_base_reward
 func get_base_reward(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
            eip4844.BeaconState,
@@ -664,7 +664,7 @@ func get_base_reward(
     state.validators[index].effective_balance div EFFECTIVE_BALANCE_INCREMENT
   increments * base_reward_per_increment
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#attestations
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#attestations
 proc check_attestation*(
     state: ForkyBeaconState, attestation: SomeAttestation, flags: UpdateFlags,
     cache: var StateCache): Result[void, cstring] =
@@ -778,7 +778,7 @@ proc process_attestation*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_next_sync_committee_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_next_sync_committee_indices
 func get_next_sync_committee_keys(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
            eip4844.BeaconState):
@@ -875,7 +875,7 @@ func get_expected_withdrawals*(
     validator_index = (validator_index + 1) mod num_validators
   withdrawals
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_next_sync_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_next_sync_committee
 func get_next_sync_committee*(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
            eip4844.BeaconState):
@@ -894,7 +894,7 @@ func get_next_sync_committee*(
   res.aggregate_pubkey = finish(attestersAgg).toPubKey()
   res
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/fork.md#upgrading-the-state
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/fork.md#upgrading-the-state
 func translate_participation(
     state: var altair.BeaconState,
     pending_attestations: openArray[phase0.PendingAttestation]) =
@@ -980,7 +980,7 @@ func upgrade_to_altair*(cfg: RuntimeConfig, pre: phase0.BeaconState):
 
   post
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/fork.md#upgrading-the-state
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/fork.md#upgrading-the-state
 func upgrade_to_bellatrix*(cfg: RuntimeConfig, pre: altair.BeaconState):
     ref bellatrix.BeaconState =
   let epoch = get_current_epoch(pre)
diff --git a/beacon_chain/spec/crypto.nim b/beacon_chain/spec/crypto.nim
index 3d0fb3427..73e1b174d 100644
--- a/beacon_chain/spec/crypto.nim
+++ b/beacon_chain/spec/crypto.nim
@@ -98,7 +98,7 @@ export
 
 # API
 # ----------------------------------------------------------------------
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#bls-signatures
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#bls-signatures
 
 func toPubKey*(privkey: ValidatorPrivKey): CookedPubKey =
   ## Derive a public key from a private key
@@ -206,7 +206,7 @@ func finish*(agg: AggregateSignature): CookedSig {.inline.} =
   sig.finish(agg)
   CookedSig(sig)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#bls-signatures
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#bls-signatures
 func blsVerify*(
     pubkey: CookedPubKey, message: openArray[byte],
     signature: CookedSig): bool =
@@ -219,7 +219,7 @@ func blsVerify*(
   ## to enforce correct usage.
   PublicKey(pubkey).verify(message, blscurve.Signature(signature))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#bls-signatures
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#bls-signatures
 proc blsVerify*(
     pubkey: ValidatorPubKey, message: openArray[byte],
     signature: CookedSig): bool =
diff --git a/beacon_chain/spec/datatypes/altair.nim b/beacon_chain/spec/datatypes/altair.nim
index deda41670..d6a496ea0 100644
--- a/beacon_chain/spec/datatypes/altair.nim
+++ b/beacon_chain/spec/datatypes/altair.nim
@@ -30,7 +30,7 @@ from ssz_serialization/proofs import GeneralizedIndex
 export proofs.GeneralizedIndex
 
 const
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#incentivization-weights
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#incentivization-weights
   TIMELY_SOURCE_WEIGHT* = 14
   TIMELY_TARGET_WEIGHT* = 26
   TIMELY_HEAD_WEIGHT* = 14
@@ -41,7 +41,7 @@ const
   PARTICIPATION_FLAG_WEIGHTS* =
     [TIMELY_SOURCE_WEIGHT, TIMELY_TARGET_WEIGHT, TIMELY_HEAD_WEIGHT]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#misc
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#misc
   TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE* = 16
   SYNC_COMMITTEE_SUBNET_COUNT* = 4
 
@@ -50,17 +50,17 @@ const
   # The first member (`genesis_time`) is 32, subsequent members +1 each.
   # If there are ever more than 32 members in `BeaconState`, indices change!
   # `FINALIZED_ROOT_INDEX` is one layer deeper, i.e., `52 * 2 + 1`.
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/ssz/merkle-proofs.md
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/ssz/merkle-proofs.md
   FINALIZED_ROOT_INDEX* = 105.GeneralizedIndex # `finalized_checkpoint` > `root`
   CURRENT_SYNC_COMMITTEE_INDEX* = 54.GeneralizedIndex # `current_sync_committee`
   NEXT_SYNC_COMMITTEE_INDEX* = 55.GeneralizedIndex # `next_sync_committee`
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#participation-flag-indices
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#participation-flag-indices
   TIMELY_SOURCE_FLAG_INDEX* = 0
   TIMELY_TARGET_FLAG_INDEX* = 1
   TIMELY_HEAD_FLAG_INDEX* = 2
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#inactivity-penalties
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#inactivity-penalties
   INACTIVITY_SCORE_BIAS* = 4
   INACTIVITY_SCORE_RECOVERY_RATE* = 16
 
@@ -74,7 +74,7 @@ static: doAssert TIMELY_SOURCE_WEIGHT + TIMELY_TARGET_WEIGHT +
 type
   ### New types
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#custom-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#custom-types
   ParticipationFlags* = uint8
 
   EpochParticipationFlags* =
@@ -83,7 +83,7 @@ type
     ## effectively making the cost of clearing the cache higher than the typical
     ## gains
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#syncaggregate
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#syncaggregate
   SyncAggregate* = object
     sync_committee_bits*: BitArray[SYNC_COMMITTEE_SIZE]
     sync_committee_signature*: ValidatorSig
@@ -92,12 +92,12 @@ type
     sync_committee_bits*: BitArray[SYNC_COMMITTEE_SIZE]
     sync_committee_signature*: TrustedSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#synccommittee
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#synccommittee
   SyncCommittee* = object
     pubkeys*: HashArray[Limit SYNC_COMMITTEE_SIZE, ValidatorPubKey]
     aggregate_pubkey*: ValidatorPubKey
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#synccommitteemessage
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#synccommitteemessage
   SyncCommitteeMessage* = object
     slot*: Slot
       ## Slot to which this contribution pertains
@@ -111,7 +111,7 @@ type
     signature*: ValidatorSig
       ## Signature by the validator over the block root of `slot`
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#synccommitteecontribution
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#synccommitteecontribution
   SyncCommitteeAggregationBits* =
     BitArray[SYNC_SUBCOMMITTEE_SIZE]
 
@@ -133,18 +133,18 @@ type
     signature*: ValidatorSig
       ## Signature by the validator(s) over the block root of `slot`
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#contributionandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#contributionandproof
   ContributionAndProof* = object
     aggregator_index*: uint64 # `ValidatorIndex` after validation
     contribution*: SyncCommitteeContribution
     selection_proof*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#signedcontributionandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#signedcontributionandproof
   SignedContributionAndProof* = object
     message*: ContributionAndProof
     signature*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#syncaggregatorselectiondata
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#syncaggregatorselectiondata
   SyncAggregatorSelectionData* = object
     slot*: Slot
     subcommittee_index*: uint64 # `SyncSubcommitteeIndex` after validation
@@ -252,7 +252,7 @@ type
       ## safety threshold)
     current_max_active_participants*: uint64
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#beaconstate
   BeaconState* = object
     # Versioning
     genesis_time*: uint64
@@ -337,7 +337,7 @@ type
     data*: BeaconState
     root*: Eth2Digest # hash_tree_root(data)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beaconblock
   BeaconBlock* = object
     ## For each slot, a proposer is chosen from the validator pool to propose
     ## a new block. Once the block as been proposed, it is transmitted to
@@ -394,7 +394,7 @@ type
     state_root*: Eth2Digest
     body*: TrustedBeaconBlockBody
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#beaconblockbody
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#beaconblockbody
   BeaconBlockBody* = object
     randao_reveal*: ValidatorSig
     eth1_data*: Eth1Data
@@ -446,7 +446,7 @@ type
 
   SyncnetBits* = BitArray[SYNC_COMMITTEE_SUBNET_COUNT]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/p2p-interface.md#metadata
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/p2p-interface.md#metadata
   MetaData* = object
     seq_number*: uint64
     attnets*: AttnetBits
@@ -471,7 +471,7 @@ type
     # [New in Altair]
     sync_aggregate*: TrustedSyncAggregate
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#signedbeaconblock
   SignedBeaconBlock* = object
     message*: BeaconBlock
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/datatypes/base.nim b/beacon_chain/spec/datatypes/base.nim
index 25fdc848d..2f96800d8 100644
--- a/beacon_chain/spec/datatypes/base.nim
+++ b/beacon_chain/spec/datatypes/base.nim
@@ -85,7 +85,7 @@ const
   ZERO_HASH* = Eth2Digest()
   MAX_GRAFFITI_SIZE* = 32
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#configuration
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#configuration
   MAXIMUM_GOSSIP_CLOCK_DISPARITY* = 500.millis
 
   SLOTS_PER_ETH1_VOTING_PERIOD* =
@@ -129,7 +129,7 @@ template maxSize*(n: int) {.pragma.}
 # - broke the compiler in SSZ and nim-serialization
 
 type
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#custom-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#custom-types
   Eth2Domain* = array[32, byte]
 
   ValidatorIndex* = distinct uint32
@@ -176,7 +176,7 @@ type
   # SSZ / hashing purposes
   JustificationBits* = distinct uint8
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#proposerslashing
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#proposerslashing
   ProposerSlashing* = object
     signed_header_1*: SignedBeaconBlockHeader
     signed_header_2*: SignedBeaconBlockHeader
@@ -188,7 +188,7 @@ type
     signed_header_1*: TrustedSignedBeaconBlockHeader
     signed_header_2*: TrustedSignedBeaconBlockHeader
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#attesterslashing
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#attesterslashing
   AttesterSlashing* = object
     attestation_1*: IndexedAttestation
     attestation_2*: IndexedAttestation
@@ -200,7 +200,7 @@ type
     attestation_1*: TrustedIndexedAttestation
     attestation_2*: TrustedIndexedAttestation
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#indexedattestation
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#indexedattestation
   IndexedAttestation* = object
     attesting_indices*: List[uint64, Limit MAX_VALIDATORS_PER_COMMITTEE]
     data*: AttestationData
@@ -216,7 +216,7 @@ type
 
   CommitteeValidatorsBits* = BitList[Limit MAX_VALIDATORS_PER_COMMITTEE]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#attestation
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#attestation
   Attestation* = object
     aggregation_bits*: CommitteeValidatorsBits
     data*: AttestationData
@@ -232,17 +232,17 @@ type
 
   ForkDigest* = distinct array[4, byte]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#forkdata
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#forkdata
   ForkData* = object
     current_version*: Version
     genesis_validators_root*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#checkpoint
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#checkpoint
   Checkpoint* = object
     epoch*: Epoch
     root*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#AttestationData
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#AttestationData
   AttestationData* = object
     slot*: Slot
 
@@ -255,20 +255,20 @@ type
     source*: Checkpoint
     target*: Checkpoint
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#deposit
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#deposit
   Deposit* = object
     proof*: array[DEPOSIT_CONTRACT_TREE_DEPTH + 1, Eth2Digest]
       ## Merkle path to deposit root
 
     data*: DepositData
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#depositmessage
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#depositmessage
   DepositMessage* = object
     pubkey*: ValidatorPubKey
     withdrawal_credentials*: Eth2Digest
     amount*: Gwei
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#depositdata
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#depositdata
   DepositData* = object
     pubkey*: ValidatorPubKey
     withdrawal_credentials*: Eth2Digest
@@ -277,7 +277,7 @@ type
     # if the deposit should be added or not during processing
     signature*: ValidatorSig  # Signing over DepositMessage
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#voluntaryexit
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#voluntaryexit
   VoluntaryExit* = object
     epoch*: Epoch
       ## Earliest epoch when voluntary exit can be processed
@@ -305,7 +305,7 @@ type
     pubkey*: CookedPubKey
     withdrawal_credentials*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#validator
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#validator
   Validator* = object
     pubkey*: ValidatorPubKey
 
@@ -327,7 +327,7 @@ type
     withdrawable_epoch*: Epoch
       ## When validator can withdraw or transfer funds
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#pendingattestation
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#pendingattestation
   PendingAttestation* = object
     aggregation_bits*: CommitteeValidatorsBits
     data*: AttestationData
@@ -336,12 +336,12 @@ type
 
     proposer_index*: uint64 # `ValidatorIndex` after validation
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#historicalbatch
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#historicalbatch
   HistoricalBatch* = object
     block_roots* : array[SLOTS_PER_HISTORICAL_ROOT, Eth2Digest]
     state_roots* : array[SLOTS_PER_HISTORICAL_ROOT, Eth2Digest]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#fork
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#fork
   Fork* = object
     previous_version*: Version
     current_version*: Version
@@ -349,13 +349,13 @@ type
     epoch*: Epoch
       ## Epoch of latest fork
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#eth1data
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#eth1data
   Eth1Data* = object
     deposit_root*: Eth2Digest
     deposit_count*: uint64
     block_hash*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#signedvoluntaryexit
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#signedvoluntaryexit
   SignedVoluntaryExit* = object
     message*: VoluntaryExit
     signature*: ValidatorSig
@@ -364,7 +364,7 @@ type
     message*: VoluntaryExit
     signature*: TrustedSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beaconblockheader
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beaconblockheader
   BeaconBlockHeader* = object
     slot*: Slot
     proposer_index*: uint64 # `ValidatorIndex` after validation
@@ -372,14 +372,14 @@ type
     state_root*: Eth2Digest
     body_root*: Eth2Digest
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#signingdata
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#signingdata
   SigningData* = object
     object_root*: Eth2Digest
     domain*: Eth2Domain
 
   GraffitiBytes* = distinct array[MAX_GRAFFITI_SIZE, byte]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#signedbeaconblockheader
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#signedbeaconblockheader
   SignedBeaconBlockHeader* = object
     message*: BeaconBlockHeader
     signature*: ValidatorSig
@@ -388,13 +388,13 @@ type
     message*: BeaconBlockHeader
     signature*: TrustedSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#aggregateandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#aggregateandproof
   AggregateAndProof* = object
     aggregator_index*: uint64 # `ValidatorIndex` after validation
     aggregate*: Attestation
     selection_proof*: ValidatorSig
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#signedaggregateandproof
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#signedaggregateandproof
   SignedAggregateAndProof* = object
     message*: AggregateAndProof
     signature*: ValidatorSig
@@ -412,12 +412,12 @@ type
     sync_committees*: Table[SyncCommitteePeriod, SyncCommitteeCache]
 
   # This matches the mutable state of the Solidity deposit contract
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/solidity_deposit_contract/deposit_contract.sol
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/solidity_deposit_contract/deposit_contract.sol
   DepositContractState* = object
     branch*: array[DEPOSIT_CONTRACT_TREE_DEPTH, Eth2Digest]
     deposit_count*: array[32, byte] # Uint256
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#validator
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#validator
   ValidatorStatus* = object
     # This is a validator without the expensive, immutable, append-only parts
     # serialized. They're represented in memory to allow in-place SSZ reading
@@ -443,7 +443,7 @@ type
     withdrawable_epoch*: Epoch
       ## When validator can withdraw or transfer funds
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#validator
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#validator
   ValidatorStatusCapella* = object
     # This is a validator without the expensive, immutable, append-only parts
     # serialized. They're represented in memory to allow in-place SSZ reading
@@ -469,7 +469,7 @@ type
     withdrawable_epoch*: Epoch
       ## When validator can withdraw or transfer funds
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#eth2-field
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#eth2-field
   ENRForkID* = object
     fork_digest*: ForkDigest
     next_fork_version*: Version
diff --git a/beacon_chain/spec/datatypes/bellatrix.nim b/beacon_chain/spec/datatypes/bellatrix.nim
index 37e452ec5..5f2058b3c 100644
--- a/beacon_chain/spec/datatypes/bellatrix.nim
+++ b/beacon_chain/spec/datatypes/bellatrix.nim
@@ -32,7 +32,7 @@ const
   FORKCHOICEUPDATED_TIMEOUT* = 8.seconds
 
 type
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#custom-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#custom-types
   Transaction* = List[byte, Limit MAX_BYTES_PER_TRANSACTION]
 
   ExecutionAddress* = object
@@ -43,7 +43,7 @@ type
 
   PayloadID* = array[8, byte]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#executionpayload
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#executionpayload
   ExecutionPayload* = object
     parent_hash*: Eth2Digest
     fee_recipient*: ExecutionAddress  # 'beneficiary' in the yellow paper
@@ -62,7 +62,7 @@ type
     block_hash*: Eth2Digest # Hash of execution block
     transactions*: List[Transaction, MAX_TRANSACTIONS_PER_PAYLOAD]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#executionpayloadheader
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#executionpayloadheader
   ExecutionPayloadHeader* = object
     parent_hash*: Eth2Digest
     fee_recipient*: ExecutionAddress
@@ -84,13 +84,13 @@ type
   ExecutePayload* = proc(
     execution_payload: ExecutionPayload): bool {.gcsafe, raises: [Defect].}
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/fork-choice.md#powblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/fork-choice.md#powblock
   PowBlock* = object
     block_hash*: Eth2Digest
     parent_hash*: Eth2Digest
     total_difficulty*: Eth2Digest   # uint256
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#beaconstate
   BeaconState* = object
     # Versioning
     genesis_time*: uint64
@@ -158,7 +158,7 @@ type
     data*: BeaconState
     root*: Eth2Digest # hash_tree_root(data)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beaconblock
   BeaconBlock* = object
     ## For each slot, a proposer is chosen from the validator pool to propose
     ## a new block. Once the block as been proposed, it is transmitted to
@@ -215,7 +215,7 @@ type
     state_root*: Eth2Digest
     body*: TrustedBeaconBlockBody
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#beaconblockbody
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#beaconblockbody
   BeaconBlockBody* = object
     randao_reveal*: ValidatorSig
     eth1_data*: Eth1Data
@@ -293,7 +293,7 @@ type
     # Execution
     execution_payload*: ExecutionPayload  # [New in Bellatrix]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#signedbeaconblock
   SignedBeaconBlock* = object
     message*: BeaconBlock
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/datatypes/constants.nim b/beacon_chain/spec/datatypes/constants.nim
index 2a0db6e39..07ed6e73d 100644
--- a/beacon_chain/spec/datatypes/constants.nim
+++ b/beacon_chain/spec/datatypes/constants.nim
@@ -21,7 +21,7 @@ const
   FAR_FUTURE_EPOCH* = Epoch(not 0'u64)
   FAR_FUTURE_PERIOD* = SyncCommitteePeriod(not 0'u64)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#domain-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#domain-types
   DOMAIN_BEACON_PROPOSER* = DomainType([byte 0x00, 0x00, 0x00, 0x00])
   DOMAIN_BEACON_ATTESTER* = DomainType([byte 0x01, 0x00, 0x00, 0x00])
   DOMAIN_RANDAO* = DomainType([byte 0x02, 0x00, 0x00, 0x00])
@@ -31,7 +31,7 @@ const
   DOMAIN_AGGREGATE_AND_PROOF* = DomainType([byte 0x06, 0x00, 0x00, 0x00])
   DOMAIN_APPLICATION_MASK* = DomainType([byte 0x00, 0x00, 0x00, 0x01])
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#domain-types
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#domain-types
   DOMAIN_SYNC_COMMITTEE* = DomainType([byte 0x07, 0x00, 0x00, 0x00])
   DOMAIN_SYNC_COMMITTEE_SELECTION_PROOF* = DomainType([byte 0x08, 0x00, 0x00, 0x00])
   DOMAIN_CONTRIBUTION_AND_PROOF* = DomainType([byte 0x09, 0x00, 0x00, 0x00])
@@ -39,11 +39,11 @@ const
   # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/capella/beacon-chain.md#domain-types
   DOMAIN_BLS_TO_EXECUTION_CHANGE* = DomainType([byte 0x0a, 0x00, 0x00, 0x00])
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#transition-settings
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#transition-settings
   TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH* = FAR_FUTURE_EPOCH
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/fork-choice.md#configuration
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/fork-choice.md#configuration
   PROPOSER_SCORE_BOOST*: uint64 = 40
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#misc
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#misc
   ATTESTATION_SUBNET_COUNT*: uint64 = 64
diff --git a/beacon_chain/spec/datatypes/eip4844.nim b/beacon_chain/spec/datatypes/eip4844.nim
index 6f880bc44..3c37ac0ba 100644
--- a/beacon_chain/spec/datatypes/eip4844.nim
+++ b/beacon_chain/spec/datatypes/eip4844.nim
@@ -28,13 +28,13 @@ import
 export json_serialization, base
 
 const
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/polynomial-commitments.md#constants
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/eip4844/polynomial-commitments.md#constants
   BYTES_PER_FIELD_ELEMENT = 32
 
   # https://github.com/ethereum/consensus-specs/blob/v1.3.0-alpha.1/specs/eip4844/beacon-chain.md#blob
   BLOB_TX_TYPE* = 0x05'u8
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/polynomial-commitments.md#constants
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/eip4844/polynomial-commitments.md#constants
   BLS_MODULUS* = "52435875175126190479447740508185965837690552500527637822603658699938581184513".u256
   # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/p2p-interface.md#configuration
   MIN_EPOCHS_FOR_BLOBS_SIDECARS_REQUESTS* = 4096'u64
@@ -63,7 +63,7 @@ type
     beacon_block*: SignedBeaconBlock
     blobs_sidecar*: BlobsSidecar
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/beacon-chain.md#executionpayload
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/eip4844/beacon-chain.md#executionpayload
   ExecutionPayload* = object
     parent_hash*: Eth2Digest
     fee_recipient*: ExecutionAddress  # 'beneficiary' in the yellow paper
@@ -84,7 +84,7 @@ type
     transactions*: List[Transaction, MAX_TRANSACTIONS_PER_PAYLOAD]
     withdrawals*: List[Withdrawal, MAX_WITHDRAWALS_PER_PAYLOAD]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/beacon-chain.md#executionpayloadheader
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/eip4844/beacon-chain.md#executionpayloadheader
   ExecutionPayloadHeader* = object
     parent_hash*: Eth2Digest
     fee_recipient*: ExecutionAddress
@@ -185,7 +185,7 @@ type
     data*: BeaconState
     root*: Eth2Digest # hash_tree_root(data)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beaconblock
   BeaconBlock* = object
     ## For each slot, a proposer is chosen from the validator pool to propose
     ## a new block. Once the block as been proposed, it is transmitted to
@@ -242,7 +242,7 @@ type
     state_root*: Eth2Digest
     body*: TrustedBeaconBlockBody
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/beacon-chain.md#beaconblockbody
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/eip4844/beacon-chain.md#beaconblockbody
   BeaconBlockBody* = object
     randao_reveal*: ValidatorSig
     eth1_data*: Eth1Data
@@ -323,7 +323,7 @@ type
     bls_to_execution_changes*: SignedBLSToExecutionChangeList
     blob_kzg_commitments*: List[KZGCommitment, Limit MAX_BLOBS_PER_BLOCK]  # [New in EIP-4844]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#signedbeaconblock
   SignedBeaconBlock* = object
     message*: BeaconBlock
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/datatypes/phase0.nim b/beacon_chain/spec/datatypes/phase0.nim
index 154369629..24ba5c67b 100644
--- a/beacon_chain/spec/datatypes/phase0.nim
+++ b/beacon_chain/spec/datatypes/phase0.nim
@@ -25,7 +25,7 @@ import
 export base
 
 type
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beaconstate
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beaconstate
   BeaconState* = object
     # Versioning
     genesis_time*: uint64
@@ -75,7 +75,7 @@ type
     current_justified_checkpoint*: Checkpoint
     finalized_checkpoint*: Checkpoint
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_total_balance
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_total_balance
   TotalBalances* = object
     # The total effective balance of all active validators during the _current_
     # epoch.
@@ -112,7 +112,7 @@ type
     data*: BeaconState
     root*: Eth2Digest # hash_tree_root(data)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beaconblock
   BeaconBlock* = object
     ## For each slot, a proposer is chosen from the validator pool to propose
     ## a new block. Once the block as been proposed, it is transmitted to
@@ -131,7 +131,7 @@ type
 
     body*: BeaconBlockBody
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#metadata
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#metadata
   MetaData* = object
     seq_number*: uint64
     attnets*: AttnetBits
@@ -173,7 +173,7 @@ type
     state_root*: Eth2Digest
     body*: TrustedBeaconBlockBody
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beaconblockbody
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beaconblockbody
   BeaconBlockBody* = object
     randao_reveal*: ValidatorSig
     eth1_data*: Eth1Data
@@ -222,7 +222,7 @@ type
     deposits*: List[Deposit, Limit MAX_DEPOSITS]
     voluntary_exits*: List[TrustedSignedVoluntaryExit, Limit MAX_VOLUNTARY_EXITS]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#signedbeaconblock
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#signedbeaconblock
   SignedBeaconBlock* = object
     message*: BeaconBlock
     signature*: ValidatorSig
diff --git a/beacon_chain/spec/digest.nim b/beacon_chain/spec/digest.nim
index f40c12b73..e8ec86ca9 100644
--- a/beacon_chain/spec/digest.nim
+++ b/beacon_chain/spec/digest.nim
@@ -7,7 +7,7 @@
 
 # Serenity hash function / digest
 #
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#hash
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#hash
 #
 # In Phase 0 the beacon chain is deployed with SHA256 (SHA2-256).
 # Note that is is different from Keccak256 (often mistakenly called SHA3-256)
diff --git a/beacon_chain/spec/eth2_apis/rest_types.nim b/beacon_chain/spec/eth2_apis/rest_types.nim
index da9b7504a..750dd482f 100644
--- a/beacon_chain/spec/eth2_apis/rest_types.nim
+++ b/beacon_chain/spec/eth2_apis/rest_types.nim
@@ -273,7 +273,7 @@ type
     of BeaconBlockFork.EIP4844:   eip4844Body*: eip4844.BeaconBlockBody
 
   RestSpec* = object
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/phase0.yaml
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/phase0.yaml
     MAX_COMMITTEES_PER_SLOT*: uint64
     TARGET_COMMITTEE_SIZE*: uint64
     MAX_VALIDATORS_PER_COMMITTEE*: uint64
@@ -308,7 +308,7 @@ type
     MAX_DEPOSITS*: uint64
     MAX_VOLUNTARY_EXITS*: uint64
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/altair.yaml
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/altair.yaml
     INACTIVITY_PENALTY_QUOTIENT_ALTAIR*: uint64
     MIN_SLASHING_PENALTY_QUOTIENT_ALTAIR*: uint64
     PROPORTIONAL_SLASHING_MULTIPLIER_ALTAIR*: uint64
@@ -317,7 +317,7 @@ type
     MIN_SYNC_COMMITTEE_PARTICIPANTS*: uint64
     UPDATE_TIMEOUT*: uint64
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/bellatrix.yaml
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/bellatrix.yaml
     INACTIVITY_PENALTY_QUOTIENT_BELLATRIX*: uint64
     MIN_SLASHING_PENALTY_QUOTIENT_BELLATRIX*: uint64
     PROPORTIONAL_SLASHING_MULTIPLIER_BELLATRIX*: uint64
@@ -359,7 +359,7 @@ type
     DEPOSIT_NETWORK_ID*: uint64
     DEPOSIT_CONTRACT_ADDRESS*: Eth1Address
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#constants
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#constants
     # GENESIS_SLOT
     # GENESIS_EPOCH
     # FAR_FUTURE_EPOCH
@@ -377,7 +377,7 @@ type
     DOMAIN_SELECTION_PROOF*: DomainType
     DOMAIN_AGGREGATE_AND_PROOF*: DomainType
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#constants
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#constants
     TIMELY_SOURCE_FLAG_INDEX*: byte
     TIMELY_TARGET_FLAG_INDEX*: byte
     TIMELY_HEAD_FLAG_INDEX*: byte
@@ -392,7 +392,7 @@ type
     DOMAIN_CONTRIBUTION_AND_PROOF*: DomainType
     # PARTICIPATION_FLAG_WEIGHTS
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#constants
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#constants
     TARGET_AGGREGATORS_PER_COMMITTEE*: uint64
     RANDOM_SUBNETS_PER_VALIDATOR*: uint64
     EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION*: uint64
diff --git a/beacon_chain/spec/helpers.nim b/beacon_chain/spec/helpers.nim
index 46550365d..2acd04184 100644
--- a/beacon_chain/spec/helpers.nim
+++ b/beacon_chain/spec/helpers.nim
@@ -43,7 +43,7 @@ func shortLog*(v: FinalityCheckpoints): auto =
 
 chronicles.formatIt FinalityCheckpoints: it.shortLog
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#integer_squareroot
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#integer_squareroot
 func integer_squareroot*(n: SomeInteger): SomeInteger =
   ## Return the largest integer ``x`` such that ``x**2 <= n``.
   doAssert n >= 0'u64
@@ -56,7 +56,7 @@ func integer_squareroot*(n: SomeInteger): SomeInteger =
     y = (x + n div x) div 2
   x
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#is_active_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#is_active_validator
 func is_active_validator*(validator: Validator, epoch: Epoch): bool =
   ## Check if ``validator`` is active
   validator.activation_epoch <= epoch and epoch < validator.exit_epoch
@@ -68,7 +68,7 @@ func is_exited_validator*(validator: Validator, epoch: Epoch): bool =
 func is_withdrawable_validator*(validator: Validator, epoch: Epoch): bool =
   epoch >= validator.withdrawable_epoch
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_active_validator_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_active_validator_indices
 iterator get_active_validator_indices*(state: ForkyBeaconState, epoch: Epoch):
     ValidatorIndex =
   for vidx in state.validators.vindices:
@@ -94,23 +94,23 @@ func get_active_validator_indices_len*(
   withState(state):
     get_active_validator_indices_len(forkyState.data, epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_current_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_current_epoch
 func get_current_epoch*(state: ForkyBeaconState): Epoch =
   ## Return the current epoch.
   state.slot.epoch
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_current_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_current_epoch
 func get_current_epoch*(state: ForkedHashedBeaconState): Epoch =
   ## Return the current epoch.
   withState(state): get_current_epoch(forkyState.data)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_previous_epoch
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_previous_epoch
 func get_previous_epoch*(
     state: ForkyBeaconState | ForkedHashedBeaconState): Epoch =
   ## Return the previous epoch (unless the current epoch is ``GENESIS_EPOCH``).
   get_previous_epoch(get_current_epoch(state))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_randao_mix
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_randao_mix
 func get_randao_mix*(state: ForkyBeaconState, epoch: Epoch): Eth2Digest =
   ## Returns the randao mix at a recent ``epoch``.
   state.randao_mixes[epoch mod EPOCHS_PER_HISTORICAL_VECTOR]
@@ -132,7 +132,7 @@ func uint_to_bytes*(x: uint32): array[4, byte] = toBytesLE(x)
 func uint_to_bytes*(x: uint16): array[2, byte] = toBytesLE(x)
 func uint_to_bytes*(x: uint8): array[1, byte] = toBytesLE(x)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#compute_domain
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#compute_domain
 func compute_domain*(
     domain_type: DomainType,
     fork_version: Version,
@@ -147,7 +147,7 @@ func compute_domain*(
   result[0..3] = domain_type.data
   result[4..31] = fork_data_root.data.toOpenArray(0, 27)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_domain
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_domain
 func get_domain*(
     fork: Fork,
     domain_type: DomainType,
@@ -168,7 +168,7 @@ func get_domain*(
   ## of a message.
   get_domain(state.fork, domain_type, epoch, state.genesis_validators_root)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#compute_signing_root
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#compute_signing_root
 func compute_signing_root*(ssz_object: auto, domain: Eth2Domain): Eth2Digest =
   ## Return the signing root of an object by calculating the root of the
   ## object-domain tree.
@@ -178,7 +178,7 @@ func compute_signing_root*(ssz_object: auto, domain: Eth2Domain): Eth2Digest =
   )
   hash_tree_root(domain_wrapped_object)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_seed
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_seed
 func get_seed*(state: ForkyBeaconState, epoch: Epoch, domain_type: DomainType):
     Eth2Digest =
   ## Return the seed at ``epoch``.
@@ -196,12 +196,12 @@ func get_seed*(state: ForkyBeaconState, epoch: Epoch, domain_type: DomainType):
       epoch + EPOCHS_PER_HISTORICAL_VECTOR - MIN_SEED_LOOKAHEAD - 1).data
   eth2digest(seed_input)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#add_flag
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#add_flag
 func add_flag*(flags: ParticipationFlags, flag_index: int): ParticipationFlags =
   let flag = ParticipationFlags(1'u8 shl flag_index)
   flags or flag
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#has_flag
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#has_flag
 func has_flag*(flags: ParticipationFlags, flag_index: int): bool =
   let flag = ParticipationFlags(1'u8 shl flag_index)
   (flags and flag) == flag
@@ -333,14 +333,14 @@ func contextEpoch*(bootstrap: ForkyLightClientBootstrap): Epoch =
 func contextEpoch*(update: SomeForkyLightClientUpdate): Epoch =
   update.attested_header.beacon.slot.epoch
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#is_merge_transition_complete
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#is_merge_transition_complete
 func is_merge_transition_complete*(
     state: bellatrix.BeaconState | capella.BeaconState | eip4844.BeaconState): bool =
   const defaultExecutionPayloadHeader =
     default(typeof(state.latest_execution_payload_header))
   state.latest_execution_payload_header != defaultExecutionPayloadHeader
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/sync/optimistic.md#helpers
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/sync/optimistic.md#helpers
 func is_execution_block*(blck: SomeForkyBeaconBlock): bool =
   when typeof(blck).toFork >= BeaconBlockFork.Bellatrix:
     const defaultExecutionPayload =
@@ -349,7 +349,7 @@ func is_execution_block*(blck: SomeForkyBeaconBlock): bool =
   else:
     false
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#is_merge_transition_block
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#is_merge_transition_block
 func is_merge_transition_block(
     state: bellatrix.BeaconState | capella.BeaconState | eip4844.BeaconState,
     body: bellatrix.BeaconBlockBody | bellatrix.TrustedBeaconBlockBody |
@@ -362,7 +362,7 @@ func is_merge_transition_block(
   not is_merge_transition_complete(state) and
     body.execution_payload != defaultExecutionPayload
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#is_execution_enabled
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#is_execution_enabled
 func is_execution_enabled*(
     state: bellatrix.BeaconState | capella.BeaconState | eip4844.BeaconState,
     body: bellatrix.BeaconBlockBody | bellatrix.TrustedBeaconBlockBody |
@@ -373,7 +373,7 @@ func is_execution_enabled*(
           eip4844.SigVerifiedBeaconBlockBody): bool =
   is_merge_transition_block(state, body) or is_merge_transition_complete(state)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#compute_timestamp_at_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#compute_timestamp_at_slot
 func compute_timestamp_at_slot*(state: ForkyBeaconState, slot: Slot): uint64 =
   # Note: This function is unsafe with respect to overflows and underflows.
   let slots_since_genesis = slot - GENESIS_SLOT
diff --git a/beacon_chain/spec/keystore.nim b/beacon_chain/spec/keystore.nim
index 556f4e6be..23e9c1417 100644
--- a/beacon_chain/spec/keystore.nim
+++ b/beacon_chain/spec/keystore.nim
@@ -1002,7 +1002,7 @@ proc createWallet*(kdfKind: KdfKind,
     crypto: crypto,
     nextAccount: nextAccount.get(0))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#bls_withdrawal_prefix
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#bls_withdrawal_prefix
 func makeWithdrawalCredentials*(k: ValidatorPubKey): Eth2Digest =
   var bytes = eth2digest(k.toRaw())
   bytes.data[0] = BLS_WITHDRAWAL_PREFIX.uint8
diff --git a/beacon_chain/spec/network.nim b/beacon_chain/spec/network.nim
index a010fcd89..29664303c 100644
--- a/beacon_chain/spec/network.nim
+++ b/beacon_chain/spec/network.nim
@@ -17,7 +17,7 @@ import
 export base
 
 const
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#topics-and-messages
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#topics-and-messages
   # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/capella/p2p-interface.md#topics-and-messages
   # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/p2p-interface.md#topics-and-messages
   topicBeaconBlocksSuffix* = "beacon_block/ssz_snappy"
@@ -28,13 +28,13 @@ const
   topicBlsToExecutionChangeSuffix* = "bls_to_execution_change/ssz_snappy"
   topicBeaconBlockAndBlobsSidecarTopicSuffix* = "beacon_block_and_blobs_sidecar/ssz_snappy"
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#configuration
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#configuration
   MAX_CHUNK_SIZE* = 1 * 1024 * 1024 # bytes
   GOSSIP_MAX_SIZE* = 1 * 1024 * 1024 # bytes
   TTFB_TIMEOUT* = 5.seconds
   RESP_TIMEOUT* = 10.seconds
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/p2p-interface.md#configuration
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/p2p-interface.md#configuration
   GOSSIP_MAX_SIZE_BELLATRIX* = 10 * 1024 * 1024 # bytes
   MAX_CHUNK_SIZE_BELLATRIX* = 10 * 1024 * 1024 # bytes
 
@@ -75,7 +75,7 @@ func getBlsToExecutionChangeTopic*(forkDigest: ForkDigest): string =
 func getBeaconBlockAndBlobsSidecarTopic*(forkDigest: ForkDigest): string =
   eth2Prefix(forkDigest) & topicBeaconBlockAndBlobsSidecarTopicSuffix
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#broadcast-attestation
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#broadcast-attestation
 func compute_subnet_for_attestation*(
     committees_per_slot: uint64, slot: Slot, committee_index: CommitteeIndex):
     SubnetId =
@@ -91,19 +91,19 @@ func compute_subnet_for_attestation*(
     (committees_since_epoch_start + committee_index.asUInt64) mod
     ATTESTATION_SUBNET_COUNT)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#broadcast-attestation
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#broadcast-attestation
 func getAttestationTopic*(forkDigest: ForkDigest,
                           subnetId: SubnetId): string =
   ## For subscribing and unsubscribing to/from a subnet.
   eth2Prefix(forkDigest) & "beacon_attestation_" & $(subnetId) & "/ssz_snappy"
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/p2p-interface.md#topics-and-messages
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/p2p-interface.md#topics-and-messages
 func getSyncCommitteeTopic*(forkDigest: ForkDigest,
                             subcommitteeIdx: SyncSubcommitteeIndex): string =
   ## For subscribing and unsubscribing to/from a subnet.
   eth2Prefix(forkDigest) & "sync_committee_" & $subcommitteeIdx & "/ssz_snappy"
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/p2p-interface.md#topics-and-messages
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/p2p-interface.md#topics-and-messages
 func getSyncCommitteeContributionAndProofTopic*(forkDigest: ForkDigest): string =
   ## For subscribing and unsubscribing to/from a subnet.
   eth2Prefix(forkDigest) & "sync_committee_contribution_and_proof/ssz_snappy"
@@ -150,7 +150,7 @@ func getDiscoveryForkID*(cfg: RuntimeConfig,
       next_fork_version: current_fork_version,
       next_fork_epoch: FAR_FUTURE_EPOCH)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/p2p-interface.md#transitioning-the-gossip
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/p2p-interface.md#transitioning-the-gossip
 type GossipState* = set[BeaconStateFork]
 func getTargetGossipState*(
     epoch, ALTAIR_FORK_EPOCH, BELLATRIX_FORK_EPOCH, CAPELLA_FORK_EPOCH,
@@ -192,7 +192,7 @@ func getTargetGossipState*(
   targetForks
 
 func nearSyncCommitteePeriod*(epoch: Epoch): Opt[uint64] =
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#sync-committee-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#sync-committee-subnet-stability
   if epoch.is_sync_committee_period():
     return Opt.some 0'u64
   let epochsBefore =
@@ -211,7 +211,7 @@ func getSyncSubnets*(
     if not nodeHasPubkey(pubkey):
       continue
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#broadcast-sync-committee-message
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#broadcast-sync-committee-message
     # The first quarter of the pubkeys map to subnet 0, the second quarter to
     # subnet 1, the third quarter to subnet 2 and the final quarter to subnet
     # 3.
diff --git a/beacon_chain/spec/presets.nim b/beacon_chain/spec/presets.nim
index 06e01ecb5..26fd2856a 100644
--- a/beacon_chain/spec/presets.nim
+++ b/beacon_chain/spec/presets.nim
@@ -20,7 +20,7 @@ export constants
 export stint, ethtypes.toHex, ethtypes.`==`
 
 const
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#withdrawal-prefixes
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#withdrawal-prefixes
   BLS_WITHDRAWAL_PREFIX*: byte = 0
   ETH1_ADDRESS_WITHDRAWAL_PREFIX*: byte = 1
 
@@ -625,7 +625,7 @@ template name*(cfg: RuntimeConfig): string =
   else:
     const_preset
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#configuration
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#configuration
 func MIN_EPOCHS_FOR_BLOCK_REQUESTS*(cfg: RuntimeConfig): uint64 =
   cfg.MIN_VALIDATOR_WITHDRAWABILITY_DELAY + cfg.CHURN_LIMIT_QUOTIENT div 2
 
diff --git a/beacon_chain/spec/presets/mainnet/altair_preset.nim b/beacon_chain/spec/presets/mainnet/altair_preset.nim
index f7703a0d7..5bb0b5968 100644
--- a/beacon_chain/spec/presets/mainnet/altair_preset.nim
+++ b/beacon_chain/spec/presets/mainnet/altair_preset.nim
@@ -1,5 +1,5 @@
 # Mainnet preset - Altair
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/altair.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/altair.yaml
 const
   # Updated penalty values
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/mainnet/bellatrix_preset.nim b/beacon_chain/spec/presets/mainnet/bellatrix_preset.nim
index 34a11a36e..85ab87079 100644
--- a/beacon_chain/spec/presets/mainnet/bellatrix_preset.nim
+++ b/beacon_chain/spec/presets/mainnet/bellatrix_preset.nim
@@ -1,5 +1,5 @@
 # Mainnet preset - Bellatrix
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/bellatrix.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/bellatrix.yaml
 const
   # Updated penalty values
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/mainnet/capella_preset.nim b/beacon_chain/spec/presets/mainnet/capella_preset.nim
index 47ab22337..eb3aaa6fe 100644
--- a/beacon_chain/spec/presets/mainnet/capella_preset.nim
+++ b/beacon_chain/spec/presets/mainnet/capella_preset.nim
@@ -1,5 +1,5 @@
 # Mainnet preset - Capella
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/capella.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/capella.yaml
 const
   # Max operations per block
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/mainnet/eip4844_preset.nim b/beacon_chain/spec/presets/mainnet/eip4844_preset.nim
index 39dec882f..7d2f402be 100644
--- a/beacon_chain/spec/presets/mainnet/eip4844_preset.nim
+++ b/beacon_chain/spec/presets/mainnet/eip4844_preset.nim
@@ -1,5 +1,5 @@
 # Mainnet preset - EIP-4844
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/eip4844.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/eip4844.yaml
 const
   # `uint64(4096)`
   FIELD_ELEMENTS_PER_BLOB*: uint64 = 4096
diff --git a/beacon_chain/spec/presets/mainnet/phase0_preset.nim b/beacon_chain/spec/presets/mainnet/phase0_preset.nim
index ef191d041..0815434f9 100644
--- a/beacon_chain/spec/presets/mainnet/phase0_preset.nim
+++ b/beacon_chain/spec/presets/mainnet/phase0_preset.nim
@@ -1,5 +1,5 @@
 # Mainnet preset - Phase0
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/mainnet/phase0.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/mainnet/phase0.yaml
 
 const
   #
diff --git a/beacon_chain/spec/presets/minimal/altair_preset.nim b/beacon_chain/spec/presets/minimal/altair_preset.nim
index f40b1da0c..6bbf8d3b6 100644
--- a/beacon_chain/spec/presets/minimal/altair_preset.nim
+++ b/beacon_chain/spec/presets/minimal/altair_preset.nim
@@ -1,5 +1,5 @@
 # Minimal preset - Altair
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/minimal/altair.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/minimal/altair.yaml
 const
   # Updated penalty values
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/minimal/bellatrix_preset.nim b/beacon_chain/spec/presets/minimal/bellatrix_preset.nim
index cf7cdd549..c2286de18 100644
--- a/beacon_chain/spec/presets/minimal/bellatrix_preset.nim
+++ b/beacon_chain/spec/presets/minimal/bellatrix_preset.nim
@@ -1,5 +1,5 @@
 # Minimal preset - Bellatrix
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/minimal/bellatrix.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/minimal/bellatrix.yaml
 const
   # Updated penalty values
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/minimal/capella_preset.nim b/beacon_chain/spec/presets/minimal/capella_preset.nim
index 955e3353f..029840464 100644
--- a/beacon_chain/spec/presets/minimal/capella_preset.nim
+++ b/beacon_chain/spec/presets/minimal/capella_preset.nim
@@ -1,5 +1,5 @@
 # Minimal preset - Capella
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/minimal/capella.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/minimal/capella.yaml
 const
   # Max operations per block
   # ---------------------------------------------------------------
diff --git a/beacon_chain/spec/presets/minimal/eip4844_preset.nim b/beacon_chain/spec/presets/minimal/eip4844_preset.nim
index 43e83777c..f9da897cd 100644
--- a/beacon_chain/spec/presets/minimal/eip4844_preset.nim
+++ b/beacon_chain/spec/presets/minimal/eip4844_preset.nim
@@ -1,5 +1,5 @@
 # Minimal preset - EIP-4844
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/minimal/eip4844.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/minimal/eip4844.yaml
 const
   # [customized]
   FIELD_ELEMENTS_PER_BLOB*: uint64 = 4
diff --git a/beacon_chain/spec/presets/minimal/phase0_preset.nim b/beacon_chain/spec/presets/minimal/phase0_preset.nim
index e9c4f9c90..33a3021c1 100644
--- a/beacon_chain/spec/presets/minimal/phase0_preset.nim
+++ b/beacon_chain/spec/presets/minimal/phase0_preset.nim
@@ -1,5 +1,5 @@
 # Minimal preset - Phase0
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/presets/minimal/phase0.yaml
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/presets/minimal/phase0.yaml
 
 const
   #
diff --git a/beacon_chain/spec/signatures.nim b/beacon_chain/spec/signatures.nim
index 9acda8c74..d8563da5b 100644
--- a/beacon_chain/spec/signatures.nim
+++ b/beacon_chain/spec/signatures.nim
@@ -48,7 +48,7 @@ func compute_slot_signing_root*(
       fork, DOMAIN_SELECTION_PROOF, epoch, genesis_validators_root)
   compute_signing_root(slot, domain)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#aggregation-selection
 func get_slot_signature*(
     fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot,
     privkey: ValidatorPrivKey): CookedSig =
@@ -72,7 +72,7 @@ func compute_epoch_signing_root*(
   let domain = get_domain(fork, DOMAIN_RANDAO, epoch, genesis_validators_root)
   compute_signing_root(epoch, domain)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#randao-reveal
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#randao-reveal
 func get_epoch_signature*(
     fork: Fork, genesis_validators_root: Eth2Digest, epoch: Epoch,
     privkey: ValidatorPrivKey): CookedSig =
@@ -101,7 +101,7 @@ func compute_block_signing_root*(
       fork, DOMAIN_BEACON_PROPOSER, epoch, genesis_validators_root)
   compute_signing_root(blck, domain)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#signature
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#signature
 func get_block_signature*(
     fork: Fork, genesis_validators_root: Eth2Digest, slot: Slot,
     root: Eth2Digest, privkey: ValidatorPrivKey): CookedSig =
@@ -130,7 +130,7 @@ func compute_aggregate_and_proof_signing_root*(
       fork, DOMAIN_AGGREGATE_AND_PROOF, epoch, genesis_validators_root)
   compute_signing_root(aggregate_and_proof, domain)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#broadcast-aggregate
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#broadcast-aggregate
 func get_aggregate_and_proof_signature*(fork: Fork, genesis_validators_root: Eth2Digest,
                                         aggregate_and_proof: AggregateAndProof,
                                         privkey: ValidatorPrivKey): CookedSig =
@@ -158,7 +158,7 @@ func compute_attestation_signing_root*(
       fork, DOMAIN_BEACON_ATTESTER, epoch, genesis_validators_root)
   compute_signing_root(attestation_data, domain)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#aggregate-signature
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#aggregate-signature
 func get_attestation_signature*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     attestation_data: AttestationData,
@@ -186,7 +186,7 @@ func compute_deposit_signing_root*(
     domain = compute_domain(DOMAIN_DEPOSIT, version)
   compute_signing_root(deposit_message, domain)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#deposits
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#deposits
 func get_deposit_signature*(preset: RuntimeConfig,
                             deposit: DepositData,
                             privkey: ValidatorPrivKey): CookedSig =
@@ -248,7 +248,7 @@ proc verify_voluntary_exit_signature*(
 
     blsVerify(pubkey, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#prepare-sync-committee-message
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#prepare-sync-committee-message
 func compute_sync_committee_message_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     slot: Slot, beacon_block_root: Eth2Digest): Eth2Digest =
@@ -283,7 +283,7 @@ proc verify_sync_committee_signature*(
 
   blsFastAggregateVerify(pubkeys, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#aggregation-selection
 func compute_sync_committee_selection_proof_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     slot: Slot, subcommittee_index: SyncSubcommitteeIndex): Eth2Digest =
@@ -314,7 +314,7 @@ proc verify_sync_committee_selection_proof*(
 
     blsVerify(pubkey, signing_root.data, signature)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#signature
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#signature
 func compute_contribution_and_proof_signing_root*(
     fork: Fork, genesis_validators_root: Eth2Digest,
     msg: ContributionAndProof): Eth2Digest =
@@ -332,7 +332,7 @@ proc get_contribution_and_proof_signature*(
 
   blsSign(privkey, signing_root.data)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#aggregation-selection
 func is_sync_committee_aggregator*(signature: ValidatorSig): bool =
   let
     signatureDigest = eth2digest(signature.blob)
diff --git a/beacon_chain/spec/signatures_batch.nim b/beacon_chain/spec/signatures_batch.nim
index 682fcf13d..17757311c 100644
--- a/beacon_chain/spec/signatures_batch.nim
+++ b/beacon_chain/spec/signatures_batch.nim
@@ -68,7 +68,7 @@ proc aggregateAttesters(
     # Aggregation spec requires non-empty collection
     # - https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-04
     # Eth2 spec requires at least one attesting index in attestation
-    # - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+    # - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
     return err("aggregateAttesters: no attesting indices")
 
   let
@@ -94,7 +94,7 @@ proc aggregateAttesters(
     # Aggregation spec requires non-empty collection
     # - https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-04
     # Eth2 spec requires at least one attesting index in attestation
-    # - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
+    # - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#is_valid_indexed_attestation
     return err("aggregateAttesters: no attesting indices")
 
   var attestersAgg{.noinit.}: AggregatePublicKey
diff --git a/beacon_chain/spec/state_transition.nim b/beacon_chain/spec/state_transition.nim
index 7ade96de6..897654a56 100644
--- a/beacon_chain/spec/state_transition.nim
+++ b/beacon_chain/spec/state_transition.nim
@@ -6,7 +6,7 @@
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
 # State transition, as described in
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
 #
 # The entry point is `state_transition` which is at the bottom of the file!
 #
@@ -54,7 +54,7 @@ import
 
 export results, extras, phase0, altair, bellatrix
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
 proc verify_block_signature(
     state: ForkyBeaconState, signed_block: SomeForkySignedBeaconBlock):
     Result[void, cstring] =
@@ -71,7 +71,7 @@ proc verify_block_signature(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
 func verifyStateRoot(
     state: ForkyBeaconState, blck: ForkyBeaconBlock | ForkySigVerifiedBeaconBlock):
     Result[void, cstring] =
@@ -100,7 +100,7 @@ func noRollback*() =
 # Hashed-state transition functions
 # ---------------------------------------------------------------
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
 func process_slot*(
     state: var ForkyBeaconState, pre_state_root: Eth2Digest) =
   # `process_slot` is the first stage of per-slot processing - it is run for
@@ -126,7 +126,7 @@ func clear_epoch_from_cache(cache: var StateCache, epoch: Epoch) =
   for slot in epoch.slots():
     cache.beacon_proposer_indices.del slot
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#beacon-chain-state-transition-function
 proc advance_slot(
     cfg: RuntimeConfig,
     state: var ForkyBeaconState, previous_slot_state_root: Eth2Digest,
@@ -334,7 +334,7 @@ proc state_transition*(
   state_transition_block(
     cfg, state, signedBlock, cache, flags, rollback)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#preparing-for-a-beaconblock
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#preparing-for-a-beaconblock
 template partialBeaconBlock*(
     cfg: RuntimeConfig,
     state: var phase0.HashedBeaconState,
@@ -363,7 +363,7 @@ template partialBeaconBlock*(
       deposits: List[Deposit, Limit MAX_DEPOSITS](deposits),
       voluntary_exits: exits.voluntary_exits))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#preparing-a-beaconblock
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#preparing-a-beaconblock
 template partialBeaconBlock*(
     cfg: RuntimeConfig,
     state: var altair.HashedBeaconState,
@@ -545,7 +545,7 @@ proc makeBeaconBlock*[T: bellatrix.ExecutionPayload | capella.ExecutionPayload](
           forkyState.data.latest_execution_payload_header.transactions_root =
             transactions_root.get
 
-          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#beaconblockbody
+          # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#beaconblockbody
           # Effectively hash_tree_root(ExecutionPayload) with the beacon block
           # body, with the execution payload replaced by the execution payload
           # header. htr(payload) == htr(payload header), so substitute.
diff --git a/beacon_chain/spec/state_transition_block.nim b/beacon_chain/spec/state_transition_block.nim
index 6cc46dd38..71df3174f 100644
--- a/beacon_chain/spec/state_transition_block.nim
+++ b/beacon_chain/spec/state_transition_block.nim
@@ -6,7 +6,7 @@
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
 # State transition - block processing, as described in
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#block-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#block-processing
 #
 # The entry point is `process_block` which is at the bottom of this file.
 #
@@ -36,7 +36,7 @@ from ./datatypes/capella import
 
 export extras, phase0, altair
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#block-header
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#block-header
 func process_block_header*(
     state: var ForkyBeaconState, blck: SomeForkyBeaconBlock, flags: UpdateFlags,
     cache: var StateCache): Result[void, cstring] =
@@ -78,7 +78,7 @@ func `xor`[T: array](a, b: T): T =
   for i in 0..<result.len:
     result[i] = a[i] xor b[i]
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#randao
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#randao
 proc process_randao(
     state: var ForkyBeaconState, body: SomeForkyBeaconBlockBody, flags: UpdateFlags,
     cache: var StateCache): Result[void, cstring] =
@@ -111,7 +111,7 @@ proc process_randao(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#eth1-data
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#eth1-data
 func process_eth1_data(state: var ForkyBeaconState, body: SomeForkyBeaconBlockBody): Result[void, cstring]=
   if not state.eth1_data_votes.add body.eth1_data:
     # Count is reset  in process_final_updates, so this should never happen
@@ -122,14 +122,14 @@ func process_eth1_data(state: var ForkyBeaconState, body: SomeForkyBeaconBlockBo
     state.eth1_data = body.eth1_data
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#is_slashable_validator
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#is_slashable_validator
 func is_slashable_validator(validator: Validator, epoch: Epoch): bool =
   # Check if ``validator`` is slashable.
   (not validator.slashed) and
     (validator.activation_epoch <= epoch) and
     (epoch < validator.withdrawable_epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#proposer-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#proposer-slashings
 proc check_proposer_slashing*(
     state: ForkyBeaconState, proposer_slashing: SomeProposerSlashing,
     flags: UpdateFlags):
@@ -178,7 +178,7 @@ proc check_proposer_slashing*(
   withState(state):
     check_proposer_slashing(forkyState.data, proposer_slashing, flags)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#proposer-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#proposer-slashings
 proc process_proposer_slashing*(
     cfg: RuntimeConfig, state: var ForkyBeaconState,
     proposer_slashing: SomeProposerSlashing, flags: UpdateFlags,
@@ -188,7 +188,7 @@ proc process_proposer_slashing*(
   ? slash_validator(cfg, state, proposer_index, cache)
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#is_slashable_attestation_data
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#is_slashable_attestation_data
 func is_slashable_attestation_data(
     data_1: AttestationData, data_2: AttestationData): bool =
   ## Check if ``data_1`` and ``data_2`` are slashable according to Casper FFG
@@ -200,7 +200,7 @@ func is_slashable_attestation_data(
     (data_1.source.epoch < data_2.source.epoch and
      data_2.target.epoch < data_1.target.epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#attester-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#attester-slashings
 proc check_attester_slashing*(
        state: ForkyBeaconState,
        attester_slashing: SomeAttesterSlashing,
@@ -242,7 +242,7 @@ proc check_attester_slashing*(
   withState(state):
     check_attester_slashing(forkyState.data, attester_slashing, flags)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#attester-slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#attester-slashings
 proc process_attester_slashing*(
     cfg: RuntimeConfig,
     state: var ForkyBeaconState,
@@ -329,7 +329,7 @@ proc process_deposit*(cfg: RuntimeConfig,
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#voluntary-exits
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#voluntary-exits
 proc check_voluntary_exit*(
     cfg: RuntimeConfig,
     state: ForkyBeaconState,
@@ -378,7 +378,7 @@ proc check_voluntary_exit*(
   withState(state):
     check_voluntary_exit(cfg, forkyState.data, signed_voluntary_exit, flags)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#voluntary-exits
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#voluntary-exits
 proc process_voluntary_exit*(
     cfg: RuntimeConfig,
     state: var ForkyBeaconState,
@@ -424,7 +424,7 @@ proc process_bls_to_execution_change*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#operations
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#operations
 # https://github.com/ethereum/consensus-specs/blob/v1.3.0-alpha.1/specs/capella/beacon-chain.md#modified-process_operations
 proc process_operations(cfg: RuntimeConfig,
                         state: var ForkyBeaconState,
@@ -459,7 +459,7 @@ proc process_operations(cfg: RuntimeConfig,
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#sync-committee-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#sync-committee-processing
 func get_participant_reward*(total_active_balance: Gwei): Gwei =
   let
     total_active_increments =
@@ -474,7 +474,7 @@ func get_participant_reward*(total_active_balance: Gwei): Gwei =
 func get_proposer_reward*(participant_reward: Gwei): Gwei =
   participant_reward * PROPOSER_WEIGHT div (WEIGHT_DENOMINATOR - PROPOSER_WEIGHT)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#sync-committee-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#sync-committee-processing
 proc process_sync_aggregate*(
     state: var (altair.BeaconState | bellatrix.BeaconState |
                 capella.BeaconState | eip4844.BeaconState),
@@ -529,7 +529,7 @@ proc process_sync_aggregate*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#process_execution_payload
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#process_execution_payload
 proc process_execution_payload*(
     state: var bellatrix.BeaconState, payload: bellatrix.ExecutionPayload,
     notify_new_payload: bellatrix.ExecutePayload): Result[void, cstring] =
@@ -614,7 +614,7 @@ proc process_execution_payload*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/beacon-chain.md#process_execution_payload
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/eip4844/beacon-chain.md#process_execution_payload
 proc process_execution_payload*(
     state: var eip4844.BeaconState, payload: eip4844.ExecutionPayload,
     notify_new_payload: eip4844.ExecutePayload): Result[void, cstring] =
@@ -700,7 +700,7 @@ func process_withdrawals*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/beacon-chain.md#tx_peek_blob_versioned_hashes
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/eip4844/beacon-chain.md#tx_peek_blob_versioned_hashes
 func tx_peek_blob_versioned_hashes(opaque_tx: Transaction):
     Result[seq[VersionedHash], cstring] =
   ## This function retrieves the hashes from the `SignedBlobTransaction` as
@@ -729,7 +729,7 @@ func tx_peek_blob_versioned_hashes(opaque_tx: Transaction):
     res.add versionedHash
   ok res
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/beacon-chain.md#kzg_commitment_to_versioned_hash
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/eip4844/beacon-chain.md#kzg_commitment_to_versioned_hash
 func kzg_commitment_to_versioned_hash(
     kzg_commitment: eip4844.KZGCommitment): VersionedHash =
   # https://github.com/ethereum/consensus-specs/blob/v1.3.0-alpha.2/specs/eip4844/beacon-chain.md#blob
@@ -790,7 +790,7 @@ proc validate_blobs_sidecar*(slot: Slot, root: Eth2Digest,
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/eip4844/fork-choice.md#is_data_available
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/eip4844/fork-choice.md#is_data_available
 func is_data_available(
     slot: Slot, beacon_block_root: Eth2Digest,
     blob_kzg_commitments: seq[eip4844.KZGCommitment]): bool =
@@ -798,7 +798,7 @@ func is_data_available(
 
   true
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#block-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#block-processing
 # TODO workaround for https://github.com/nim-lang/Nim/issues/18095
 # copy of datatypes/phase0.nim
 type SomePhase0Block =
@@ -818,7 +818,7 @@ proc process_block*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#block-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#block-processing
 # TODO workaround for https://github.com/nim-lang/Nim/issues/18095
 # copy of datatypes/altair.nim
 type SomeAltairBlock =
@@ -847,7 +847,7 @@ proc process_block*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#block-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#block-processing
 # TODO workaround for https://github.com/nim-lang/Nim/issues/18095
 type SomeBellatrixBlock =
   bellatrix.BeaconBlock | bellatrix.SigVerifiedBeaconBlock | bellatrix.TrustedBeaconBlock
diff --git a/beacon_chain/spec/state_transition_epoch.nim b/beacon_chain/spec/state_transition_epoch.nim
index f9d2183a8..174c0aa9e 100644
--- a/beacon_chain/spec/state_transition_epoch.nim
+++ b/beacon_chain/spec/state_transition_epoch.nim
@@ -6,8 +6,8 @@
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
 # State transition - epoch processing, as described in
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#epoch-processing and
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#epoch-processing and
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#epoch-processing
 #
 # The entry point is `process_epoch`, which is at the bottom of this file.
 #
@@ -42,7 +42,7 @@ export extras, phase0, altair
 logScope: topics = "consens"
 
 # Accessors that implement the max condition in `get_total_balance`:
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_total_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_total_balance
 template current_epoch*(v: TotalBalances): Gwei =
   max(EFFECTIVE_BALANCE_INCREMENT, v.current_epoch_raw)
 template previous_epoch*(v: TotalBalances): Gwei =
@@ -157,7 +157,7 @@ func process_attestations*(
     if v.flags.contains RewardFlags.isPreviousEpochHeadAttester:
       info.balances.previous_epoch_head_attesters_raw += validator_balance
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#helpers
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#helpers
 # get_eligible_validator_indices
 func is_eligible_validator*(validator: RewardStatus): bool =
   validator.flags.contains(RewardFlags.isActiveInPreviousEpoch) or
@@ -176,8 +176,8 @@ func is_eligible_validator*(validator: ParticipationInfo): bool =
 
 from ./datatypes/eip4844 import BeaconState
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_unslashed_participating_indices
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_total_balance
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_unslashed_participating_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_total_balance
 func get_unslashed_participating_balances*(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
            eip4844.BeaconState): UnslashedParticipatingBalances =
@@ -245,7 +245,7 @@ func is_unslashed_participating_index(
     has_flag(epoch_participation[].item(validator_index), flag_index) and
     not state.validators[validator_index].slashed
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#justification-and-finalization
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#justification-and-finalization
 type FinalityState = object
   slot: Slot
   current_epoch_ancestor_root: Eth2Digest
@@ -313,7 +313,7 @@ proc weigh_justification_and_finalization(
   ## state.justification_bits[1:] = state.justification_bits[:-1]
   ## state.justification_bits[0] = 0b0
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#misc
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#misc
   const JUSTIFICATION_BITS_LENGTH = 4
 
   state.justification_bits = JustificationBits(
@@ -389,7 +389,7 @@ proc weigh_justification_and_finalization(
       current_epoch = current_epoch,
       checkpoint = shortLog(state.finalized_checkpoint)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#justification-and-finalization
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#justification-and-finalization
 proc process_justification_and_finalization*(
     state: var phase0.BeaconState,
     balances: TotalBalances, flags: UpdateFlags = {}) =
@@ -425,7 +425,7 @@ proc compute_unrealized_finality*(
     justified: finalityState.current_justified_checkpoint,
     finalized: finalityState.finalized_checkpoint)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#justification-and-finalization
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#justification-and-finalization
 proc process_justification_and_finalization*(
     state: var (altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
                 eip4844.BeaconState),
@@ -461,7 +461,7 @@ proc compute_unrealized_finality*(
     justified: finalityState.current_justified_checkpoint,
     finalized: finalityState.finalized_checkpoint)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#helpers
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#helpers
 func get_base_reward_sqrt*(state: phase0.BeaconState, index: ValidatorIndex,
     total_balance_sqrt: auto): Gwei =
   # Spec function recalculates total_balance every time, which creates an
@@ -509,7 +509,7 @@ func get_attestation_component_delta(is_unslashed_attester: bool,
   else:
     RewardDelta(penalties: base_reward)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#components-of-attestation-deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#components-of-attestation-deltas
 func get_source_delta*(validator: RewardStatus,
                        base_reward: uint64,
                        balances: TotalBalances,
@@ -587,7 +587,7 @@ func get_inactivity_penalty_delta*(validator: RewardStatus,
 
   delta
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_attestation_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_attestation_deltas
 func get_attestation_deltas(state: phase0.BeaconState, info: var phase0.EpochInfo) =
   ## Update rewards with attestation reward/penalty deltas for each validator.
 
@@ -631,7 +631,7 @@ func get_attestation_deltas(state: phase0.BeaconState, info: var phase0.EpochInf
         info.validators[proposer_index].delta.add(
           proposer_delta.get()[1])
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_base_reward
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_base_reward
 func get_base_reward_increment*(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
            eip4844.BeaconState,
@@ -642,7 +642,7 @@ func get_base_reward_increment*(
     state.validators[index].effective_balance div EFFECTIVE_BALANCE_INCREMENT
   increments * base_reward_per_increment
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_flag_index_deltas
 func get_flag_index_reward*(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
            eip4844.BeaconState,
@@ -656,16 +656,16 @@ func get_flag_index_reward*(
   else:
     0.Gwei
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_flag_index_deltas
 func get_unslashed_participating_increment*(
     info: altair.EpochInfo | bellatrix.BeaconState, flag_index: int): Gwei =
   info.balances.previous_epoch[flag_index] div EFFECTIVE_BALANCE_INCREMENT
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_flag_index_deltas
 func get_active_increments*(info: altair.EpochInfo | bellatrix.BeaconState): Gwei =
   info.balances.current_epoch div EFFECTIVE_BALANCE_INCREMENT
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#get_flag_index_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#get_flag_index_deltas
 iterator get_flag_index_deltas*(
     state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
            eip4844.BeaconState,
@@ -710,7 +710,7 @@ iterator get_flag_index_deltas*(
       else:
         (vidx, RewardDelta(rewards: 0.Gwei, penalties: 0.Gwei))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#modified-get_inactivity_penalty_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#modified-get_inactivity_penalty_deltas
 iterator get_inactivity_penalty_deltas*(
     cfg: RuntimeConfig, state: altair.BeaconState, info: altair.EpochInfo):
     (ValidatorIndex, Gwei) =
@@ -732,7 +732,7 @@ iterator get_inactivity_penalty_deltas*(
           state.inactivity_scores[vidx]
       yield (vidx, Gwei(penalty_numerator div penalty_denominator))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#modified-get_inactivity_penalty_deltas
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#modified-get_inactivity_penalty_deltas
 iterator get_inactivity_penalty_deltas*(
     cfg: RuntimeConfig,
     state: bellatrix.BeaconState | capella.BeaconState | eip4844.BeaconState,
@@ -756,7 +756,7 @@ iterator get_inactivity_penalty_deltas*(
           state.inactivity_scores[vidx]
       yield (vidx, Gwei(penalty_numerator div penalty_denominator))
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#rewards-and-penalties-1
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#rewards-and-penalties-1
 func process_rewards_and_penalties*(
     state: var phase0.BeaconState, info: var phase0.EpochInfo) =
   # No rewards are applied at the end of `GENESIS_EPOCH` because rewards are
@@ -779,7 +779,7 @@ func process_rewards_and_penalties*(
     decrease_balance(balance, v.delta.penalties)
     state.balances.asSeq()[idx] = balance
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#rewards-and-penalties
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#rewards-and-penalties
 func process_rewards_and_penalties*(
     cfg: RuntimeConfig,
     state: var (altair.BeaconState | bellatrix.BeaconState |
@@ -816,7 +816,7 @@ func process_rewards_and_penalties*(
     decrease_balance(balance, info.validators[vidx].delta.penalties)
     state.balances.asSeq()[vidx] = balance
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#registry-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#registry-updates
 func process_registry_updates*(
     cfg: RuntimeConfig, state: var ForkyBeaconState, cache: var StateCache):
     Result[void, cstring] =
@@ -869,9 +869,9 @@ func process_registry_updates*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#slashings
 func get_adjusted_total_slashing_balance*(
     state: ForkyBeaconState, total_balance: Gwei): Gwei =
   const multiplier =
@@ -888,16 +888,16 @@ func get_adjusted_total_slashing_balance*(
       {.fatal: "process_slashings: incorrect BeaconState type".}
   min(sum(state.slashings.data) * multiplier, total_balance)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#slashings
 func slashing_penalty_applies*(validator: Validator, epoch: Epoch): bool =
   validator.slashed and
   epoch + EPOCHS_PER_SLASHINGS_VECTOR div 2 == validator.withdrawable_epoch
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#slashings
 func get_slashing_penalty*(validator: Validator,
                           adjusted_total_slashing_balance,
                           total_balance: Gwei): Gwei =
@@ -907,9 +907,9 @@ func get_slashing_penalty*(validator: Validator,
                           adjusted_total_slashing_balance
   penalty_numerator div total_balance * increment
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#slashings
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/bellatrix/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#slashings
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/bellatrix/beacon-chain.md#slashings
 func process_slashings*(state: var ForkyBeaconState, total_balance: Gwei) =
   let
     epoch = get_current_epoch(state)
@@ -923,7 +923,7 @@ func process_slashings*(state: var ForkyBeaconState, total_balance: Gwei) =
         validator[], adjusted_total_slashing_balance, total_balance)
       decrease_balance(state, vidx, penalty)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#eth1-data-votes-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#eth1-data-votes-updates
 func process_eth1_data_reset*(state: var ForkyBeaconState) =
   let next_epoch = get_current_epoch(state) + 1
 
@@ -931,7 +931,7 @@ func process_eth1_data_reset*(state: var ForkyBeaconState) =
   if next_epoch mod EPOCHS_PER_ETH1_VOTING_PERIOD == 0:
     state.eth1_data_votes = default(type state.eth1_data_votes)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#effective-balances-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#effective-balances-updates
 func process_effective_balance_updates*(state: var ForkyBeaconState) =
   # Update effective balances with hysteresis
   for vidx in state.validators.vindices:
@@ -953,14 +953,14 @@ func process_effective_balance_updates*(state: var ForkyBeaconState) =
       if new_effective_balance != effective_balance:
         state.validators.mitem(vidx).effective_balance = new_effective_balance
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slashings-balances-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slashings-balances-updates
 func process_slashings_reset*(state: var ForkyBeaconState) =
   let next_epoch = get_current_epoch(state) + 1
 
   # Reset slashings
   state.slashings[int(next_epoch mod EPOCHS_PER_SLASHINGS_VECTOR)] = 0.Gwei
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#randao-mixes-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#randao-mixes-updates
 func process_randao_mixes_reset*(state: var ForkyBeaconState) =
   let
     current_epoch = get_current_epoch(state)
@@ -973,12 +973,12 @@ func process_randao_mixes_reset*(state: var ForkyBeaconState) =
 func compute_historical_root*(state: var ForkyBeaconState): Eth2Digest =
   # Equivalent to hash_tree_root(foo: HistoricalBatch), but without using
   # significant additional stack or heap.
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#historicalbatch
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#historicalbatch
   # In response to https://github.com/status-im/nimbus-eth2/issues/921
   hash_tree_root([
     hash_tree_root(state.block_roots), hash_tree_root(state.state_roots)])
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#historical-roots-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#historical-roots-updates
 func process_historical_roots_update*(state: var ForkyBeaconState) =
   ## Set historical root accumulator
   let next_epoch = get_current_epoch(state) + 1
@@ -986,19 +986,19 @@ func process_historical_roots_update*(state: var ForkyBeaconState) =
   if next_epoch mod (SLOTS_PER_HISTORICAL_ROOT div SLOTS_PER_EPOCH) == 0:
     # Equivalent to hash_tree_root(foo: HistoricalBatch), but without using
     # significant additional stack or heap.
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#historicalbatch
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#historicalbatch
     # In response to https://github.com/status-im/nimbus-eth2/issues/921
     if not state.historical_roots.add state.compute_historical_root():
       raiseAssert "no more room for historical roots, so long and thanks for the fish!"
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#participation-records-rotation
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#participation-records-rotation
 func process_participation_record_updates*(state: var phase0.BeaconState) =
   # Rotate current/previous epoch attestations - using swap avoids copying all
   # elements using a slow genericSeqAssign
   state.previous_epoch_attestations.clear()
   swap(state.previous_epoch_attestations, state.current_epoch_attestations)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#participation-flags-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#participation-flags-updates
 func process_participation_flag_updates*(
     state: var (altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
                 eip4844.BeaconState)) =
@@ -1012,7 +1012,7 @@ func process_participation_flag_updates*(
   # grows. New elements are automatically initialized to 0, as required.
   doAssert state.current_epoch_participation.asList.setLen(state.validators.len)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#sync-committee-updates
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#sync-committee-updates
 func process_sync_committee_updates*(
     state: var (altair.BeaconState | bellatrix.BeaconState |
                 capella.BeaconState | eip4844.BeaconState)) =
@@ -1021,7 +1021,7 @@ func process_sync_committee_updates*(
     state.current_sync_committee = state.next_sync_committee
     state.next_sync_committee = get_next_sync_committee(state)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#inactivity-scores
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#inactivity-scores
 func process_inactivity_updates*(
     cfg: RuntimeConfig,
     state: var (altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
@@ -1074,7 +1074,7 @@ func process_historical_summaries_update*(
 
   ok()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#epoch-processing
 proc process_epoch*(
     cfg: RuntimeConfig, state: var phase0.BeaconState, flags: UpdateFlags,
     cache: var StateCache, info: var phase0.EpochInfo): Result[void, cstring] =
@@ -1133,7 +1133,7 @@ func init*(
            eip4844.BeaconState): T =
   init(result, state)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/beacon-chain.md#epoch-processing
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/beacon-chain.md#epoch-processing
 proc process_epoch*(
     cfg: RuntimeConfig,
     state: var (altair.BeaconState | bellatrix.BeaconState),
@@ -1145,7 +1145,7 @@ proc process_epoch*(
 
   info.init(state)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#justification-and-finalization
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#justification-and-finalization
   process_justification_and_finalization(state, info.balances, flags)
 
   # state.slot hasn't been incremented yet.
@@ -1160,13 +1160,13 @@ proc process_epoch*(
 
   process_inactivity_updates(cfg, state, info)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#process_rewards_and_penalties
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#process_rewards_and_penalties
   process_rewards_and_penalties(cfg, state, info)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#registry-updates
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#registry-updates
   ? process_registry_updates(cfg, state, cache)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slashings
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slashings
   process_slashings(state, info.balances.current_epoch)
 
   process_eth1_data_reset(state)
@@ -1191,7 +1191,7 @@ proc process_epoch*(
 
   info.init(state)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#justification-and-finalization
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#justification-and-finalization
   process_justification_and_finalization(state, info.balances, flags)
 
   # state.slot hasn't been incremented yet.
@@ -1206,13 +1206,13 @@ proc process_epoch*(
 
   process_inactivity_updates(cfg, state, info)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#process_rewards_and_penalties
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#process_rewards_and_penalties
   process_rewards_and_penalties(cfg, state, info)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#registry-updates
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#registry-updates
   ? process_registry_updates(cfg, state, cache)
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#slashings
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#slashings
   process_slashings(state, info.balances.current_epoch)
 
   process_eth1_data_reset(state)
diff --git a/beacon_chain/spec/validator.nim b/beacon_chain/spec/validator.nim
index 31664e962..1525112eb 100644
--- a/beacon_chain/spec/validator.nim
+++ b/beacon_chain/spec/validator.nim
@@ -24,8 +24,8 @@ const
   PIVOT_VIEW_SIZE = SEED_SIZE + ROUND_SIZE
   TOTAL_SIZE = PIVOT_VIEW_SIZE + POSITION_WINDOW_SIZE
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#compute_shuffled_index
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#compute_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#compute_shuffled_index
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#compute_committee
 # Port of https://github.com/protolambda/zrnt/blob/master/eth2/beacon/shuffle.go
 # Shuffles or unshuffles, depending on the `dir` (true for shuffling, false for unshuffling
 func shuffle_list*(input: var seq[ValidatorIndex], seed: Eth2Digest) =
@@ -155,13 +155,13 @@ func get_shuffled_active_validator_indices*(
   withState(state):
     cache.get_shuffled_active_validator_indices(forkyState.data, epoch)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_active_validator_indices
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_active_validator_indices
 func count_active_validators*(state: ForkyBeaconState,
                               epoch: Epoch,
                               cache: var StateCache): uint64 =
   cache.get_shuffled_active_validator_indices(state, epoch).lenu64
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_committee_count_per_slot
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_committee_count_per_slot
 func get_committee_count_per_slot*(num_active_validators: uint64): uint64 =
   clamp(
     num_active_validators div SLOTS_PER_EPOCH div TARGET_COMMITTEE_SIZE,
@@ -186,7 +186,7 @@ iterator get_committee_indices*(committee_count_per_slot: uint64): CommitteeInde
     let committee_index = CommitteeIndex.init(idx).expect("value clamped")
     yield committee_index
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#compute_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#compute_committee
 func compute_committee_slice*(
     active_validators, index, count: uint64): Slice[int] =
   doAssert active_validators <= ValidatorIndex.high.uint64
@@ -232,7 +232,7 @@ func compute_committee_len*(
 
   (slice.b - slice.a + 1).uint64
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_beacon_committee
 iterator get_beacon_committee*(
     state: ForkyBeaconState, slot: Slot, index: CommitteeIndex,
     cache: var StateCache): (int, ValidatorIndex) =
@@ -272,7 +272,7 @@ func get_beacon_committee*(
   withState(state):
     get_beacon_committee(forkyState.data, slot, index, cache)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_beacon_committee
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_beacon_committee
 func get_beacon_committee_len*(
     state: ForkyBeaconState, slot: Slot, index: CommitteeIndex,
     cache: var StateCache): uint64 =
@@ -295,7 +295,7 @@ func get_beacon_committee_len*(
   withState(state):
     get_beacon_committee_len(forkyState.data, slot, index, cache)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#compute_shuffled_index
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#compute_shuffled_index
 func compute_shuffled_index*(
     index: uint64, index_count: uint64, seed: Eth2Digest): uint64 =
   ## Return the shuffled index corresponding to ``seed`` (and ``index_count``).
@@ -330,7 +330,7 @@ func compute_shuffled_index*(
 
   cur_idx_permuted
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#compute_proposer_index
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#compute_proposer_index
 func compute_proposer_index(state: ForkyBeaconState,
     indices: seq[ValidatorIndex], seed: Eth2Digest): Opt[ValidatorIndex] =
   ## Return from ``indices`` a random index sampled by effective balance.
@@ -357,7 +357,7 @@ func compute_proposer_index(state: ForkyBeaconState,
       return Opt.some(candidate_index)
     i += 1
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_beacon_proposer_index
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_beacon_proposer_index
 func get_beacon_proposer_index*(
     state: ForkyBeaconState, cache: var StateCache, slot: Slot):
     Opt[ValidatorIndex] =
@@ -395,7 +395,7 @@ func get_beacon_proposer_index*(
 
     return res
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#get_beacon_proposer_index
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#get_beacon_proposer_index
 func get_beacon_proposer_index*(state: ForkyBeaconState, cache: var StateCache):
     Opt[ValidatorIndex] =
   get_beacon_proposer_index(state, cache, state.slot)
@@ -406,7 +406,7 @@ func get_beacon_proposer_index*(state: ForkedHashedBeaconState,
   withState(state):
     get_beacon_proposer_index(forkyState.data, cache, slot)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#aggregation-selection
 func is_aggregator*(committee_len: uint64, slot_signature: ValidatorSig): bool =
   let
     modulo = max(1'u64, committee_len div TARGET_AGGREGATORS_PER_COMMITTEE)
diff --git a/beacon_chain/spec/weak_subjectivity.nim b/beacon_chain/spec/weak_subjectivity.nim
index 607557214..9079bfe59 100644
--- a/beacon_chain/spec/weak_subjectivity.nim
+++ b/beacon_chain/spec/weak_subjectivity.nim
@@ -29,7 +29,7 @@ func compute_weak_subjectivity_period(
       SAFETY_DECAY * validator_count div (2 * 100 * cfg.MIN_PER_EPOCH_CHURN_LIMIT)
   return weak_subjectivity_period
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/weak-subjectivity.md#checking-for-stale-weak-subjectivity-checkpoint
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/weak-subjectivity.md#checking-for-stale-weak-subjectivity-checkpoint
 func is_within_weak_subjectivity_period*(cfg: RuntimeConfig, current_slot: Slot,
                                          ws_state: ForkedHashedBeaconState,
                                          ws_checkpoint: Checkpoint): bool =
diff --git a/beacon_chain/validators/action_tracker.nim b/beacon_chain/validators/action_tracker.nim
index 7ea894dcd..012006672 100644
--- a/beacon_chain/validators/action_tracker.nim
+++ b/beacon_chain/validators/action_tracker.nim
@@ -80,7 +80,7 @@ type
 func hash*(x: AggregatorDuty): Hash =
   hashAllFields(x)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#phase-0-attestation-subnet-stability
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#phase-0-attestation-subnet-stability
 func randomStabilitySubnet(
     self: ActionTracker, epoch: Epoch): tuple[subnet_id: SubnetId, expiration: Epoch] =
   (
@@ -178,7 +178,7 @@ proc updateSlot*(tracker: var ActionTracker, wallSlot: Slot) =
   # One stability subnet per known validator
   static: doAssert RANDOM_SUBNETS_PER_VALIDATOR == 1
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#phase-0-attestation-subnet-stability
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#phase-0-attestation-subnet-stability
   let expectedSubnets =
     min(ATTESTATION_SUBNET_COUNT.int, tracker.knownValidators.len)
 
diff --git a/beacon_chain/validators/slashing_protection_v2.nim b/beacon_chain/validators/slashing_protection_v2.nim
index a03eab181..406de7713 100644
--- a/beacon_chain/validators/slashing_protection_v2.nim
+++ b/beacon_chain/validators/slashing_protection_v2.nim
@@ -36,7 +36,7 @@ import
 # - https://notes.ethereum.org/@djrtwo/Bkn3zpwxB#Validator-responsibilities
 #
 # Phase 0 spec - Honest Validator - how to avoid slashing
-# - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#how-to-avoid-slashing
+# - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#how-to-avoid-slashing
 #
 # In-depth reading on slashing conditions
 #
@@ -58,7 +58,7 @@ import
 #   2. An attester can get slashed for signing
 #      two attestations that together violate
 #      the Casper FFG slashing conditions.
-# - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#ffg-vote
+# - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#ffg-vote
 #   The "source" is the current_justified_epoch
 #   The "target" is the current_epoch
 #
diff --git a/beacon_chain/validators/validator_duties.nim b/beacon_chain/validators/validator_duties.nim
index 4cd4df6b2..64833d77c 100644
--- a/beacon_chain/validators/validator_duties.nim
+++ b/beacon_chain/validators/validator_duties.nim
@@ -961,7 +961,7 @@ proc handleAttestations(node: BeaconNode, head: BlockRef, slot: Slot) =
   # We need to run attestations exactly for the slot that we're attesting to.
   # In case blocks went missing, this means advancing past the latest block
   # using empty slots as fillers.
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#validator-assignments
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#validator-assignments
   let
     epochRef = node.dag.getEpochRef(
       attestationHead.blck, slot.epoch, false).valueOr:
@@ -1158,13 +1158,13 @@ proc signAndSendAggregate(
           return
         res.get()
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#aggregation-selection
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#aggregation-selection
     if not is_aggregator(
         shufflingRef, slot, committee_index, selectionProof):
       return
 
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#construct-aggregate
-    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#aggregateandproof
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#construct-aggregate
+    # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#aggregateandproof
     var
       msg = SignedAggregateAndProof(
         message: AggregateAndProof(
@@ -1536,8 +1536,8 @@ proc handleValidatorDuties*(node: BeaconNode, lastSlot, slot: Slot) {.async.} =
 
   updateValidatorMetrics(node) # the important stuff is done, update the vanity numbers
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#broadcast-aggregate
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#broadcast-sync-committee-contribution
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#broadcast-aggregate
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#broadcast-sync-committee-contribution
   # Wait 2 / 3 of the slot time to allow messages to propagate, then collect
   # the result in aggregates
   static:
diff --git a/beacon_chain/validators/validator_pool.nim b/beacon_chain/validators/validator_pool.nim
index 8e506d52b..cacfaf5fd 100644
--- a/beacon_chain/validators/validator_pool.nim
+++ b/beacon_chain/validators/validator_pool.nim
@@ -353,7 +353,7 @@ proc signData(v: AttachedValidator,
   else:
     v.signWithDistributedKey(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#signature
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#signature
 proc getBlockSignature*(v: AttachedValidator, fork: Fork,
                         genesis_validators_root: Eth2Digest, slot: Slot,
                         block_root: Eth2Digest,
@@ -432,7 +432,7 @@ proc getBlockSignature*(v: AttachedValidator, fork: Fork,
             fork, genesis_validators_root, web3SignerBlock)
         await v.signData(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#aggregate-signature
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#aggregate-signature
 proc getAttestationSignature*(v: AttachedValidator, fork: Fork,
                               genesis_validators_root: Eth2Digest,
                               data: AttestationData
@@ -448,7 +448,7 @@ proc getAttestationSignature*(v: AttachedValidator, fork: Fork,
       let request = Web3SignerRequest.init(fork, genesis_validators_root, data)
       await v.signData(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#broadcast-aggregate
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#broadcast-aggregate
 proc getAggregateAndProofSignature*(v: AttachedValidator,
                                     fork: Fork,
                                     genesis_validators_root: Eth2Digest,
@@ -467,7 +467,7 @@ proc getAggregateAndProofSignature*(v: AttachedValidator,
         fork, genesis_validators_root, aggregate_and_proof)
       await v.signData(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#prepare-sync-committee-message
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#prepare-sync-committee-message
 proc getSyncCommitteeMessage*(v: AttachedValidator,
                               fork: Fork,
                               genesis_validators_root: Eth2Digest,
@@ -498,7 +498,7 @@ proc getSyncCommitteeMessage*(v: AttachedValidator,
       )
     )
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#aggregation-selection
 proc getSyncCommitteeSelectionProof*(v: AttachedValidator, fork: Fork,
                                      genesis_validators_root: Eth2Digest,
                                      slot: Slot,
@@ -518,7 +518,7 @@ proc getSyncCommitteeSelectionProof*(v: AttachedValidator, fork: Fork,
       )
       await v.signData(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/altair/validator.md#broadcast-sync-committee-contribution
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/altair/validator.md#broadcast-sync-committee-contribution
 proc getContributionAndProofSignature*(v: AttachedValidator, fork: Fork,
                                        genesis_validators_root: Eth2Digest,
                                        contribution_and_proof: ContributionAndProof
@@ -534,7 +534,7 @@ proc getContributionAndProofSignature*(v: AttachedValidator, fork: Fork,
         fork, genesis_validators_root, contribution_and_proof)
       await v.signData(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#randao-reveal
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#randao-reveal
 proc getEpochSignature*(v: AttachedValidator, fork: Fork,
                         genesis_validators_root: Eth2Digest, epoch: Epoch
                        ): Future[SignatureResult] {.async.} =
@@ -549,7 +549,7 @@ proc getEpochSignature*(v: AttachedValidator, fork: Fork,
         fork, genesis_validators_root, epoch)
       await v.signData(request)
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#aggregation-selection
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#aggregation-selection
 proc getSlotSignature*(v: AttachedValidator, fork: Fork,
                        genesis_validators_root: Eth2Digest, slot: Slot
                       ): Future[SignatureResult] {.async.} =
diff --git a/docs/attestation_flow.md b/docs/attestation_flow.md
index 6ce7aac69..bfc377192 100644
--- a/docs/attestation_flow.md
+++ b/docs/attestation_flow.md
@@ -6,10 +6,10 @@ This is a WIP document to explain the attestation flows.
 
 It is important to distinguish attestation `validation` from attestation `verification`.
 - Attestation `validation` is defined in the P2P specs. Validated attestations can be forwarded on GossipSub.
-  - Aggregated: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
-  - Unaggregated: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
+  - Aggregated: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
+  - Unaggregated: https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#beacon_attestation_subnet_id
 - Attestation `verification` is defined in the consensus specs. Verified attestations can affect fork choice and may be included in a block.
-  - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#attestations
+  - https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#attestations
 
 From the specs it seems like gossip attestation `validation` is a superset of consensus attestation `verification`.
 
@@ -51,8 +51,8 @@ These GossipSub topics are used to listen for attestations:
 - Unaggregated: `/eth2/{$forkDigest}/beacon_attestation_{subnetIndex}/ssz_snappy`
 
 The attestations are then validated by `validateAttestation()` or `validateAggregate()` in either `attestationValidator()` or `aggregateValidator()` according to the P2P specs.
-- https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
-- https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#attestation-subnets
+- https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#beacon_aggregate_and_proof
+- https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#attestation-subnets
 
 Finally, valid attestations are added to the local `attestationPool`.
 Attestations are dropped in case of an error.
diff --git a/docs/block_flow.md b/docs/block_flow.md
index 3637dc65e..0eec8bc33 100644
--- a/docs/block_flow.md
+++ b/docs/block_flow.md
@@ -9,7 +9,7 @@ Important distinction:
   https://github.com/ethereum/consensus-specs/blob/v1.1.10/specs/phase0/p2p-interface.md#beacon_block.
   A validated block can be forwarded on gossipsub.
 - and we distinguish `verification` which is defined in consensus specs:
-  https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/beacon-chain.md#block-processing
+  https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/beacon-chain.md#block-processing
   A block needs to be verified to enter fork choice, the DAG and the BeaconChainDB
 
 In particular in terms of costly checks validating a block only requires checking:
@@ -103,7 +103,7 @@ It is important to note that 3 data structures are sharing the same `AsyncQueue[
 Blocks are listened to via the gossipsub topic `/eth2/{$forkDigest}/beacon_block/ssz_snappy` (`topicBeaconBlocks` variable)
 
 They are then:
-- validated by `blockValidator()` in the Eth2Processor by `validateBeaconBlock()` according to spec https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#beacon_block
+- validated by `blockValidator()` in the Eth2Processor by `validateBeaconBlock()` according to spec https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#beacon_block
 - Important: P2P validation is not full verification (state transition and internal cryptographic signatures were not checked)
 - enqueued in the shared block queue `AsyncQueue[BlockEntry]` in case of success
 - dropped in case of error
@@ -115,7 +115,7 @@ Logs:
 
 ### Gossip flow out
 
-- After validation in `blockValidator()` in the Eth2Processor by `validateBeaconBlock()` according to spec https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/p2p-interface.md#beacon_block
+- After validation in `blockValidator()` in the Eth2Processor by `validateBeaconBlock()` according to spec https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/p2p-interface.md#beacon_block
 - Important: P2P validation is not full verification (state transition and internal cryptographic signatures were not checked)
 - We jump into libp2p/protocols/pubsub/pubsub.nim in the method `validate(PubSub, message)`
 - which was called by `rpcHandler(GossipSub, PubSubPeer, RPCMsg)`
diff --git a/tests/consensus_spec/fixtures_utils.nim b/tests/consensus_spec/fixtures_utils.nim
index cca9ec220..13e948778 100644
--- a/tests/consensus_spec/fixtures_utils.nim
+++ b/tests/consensus_spec/fixtures_utils.nim
@@ -74,7 +74,7 @@ type
     rewards*: List[uint64, Limit VALIDATOR_REGISTRY_LIMIT]
     penalties*: List[uint64, Limit VALIDATOR_REGISTRY_LIMIT]
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#eth1block
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#eth1block
   Eth1Block* = object
     timestamp*: uint64
     deposit_root*: Eth2Digest
diff --git a/tests/testblockutil.nim b/tests/testblockutil.nim
index 216367fdc..e4045a554 100644
--- a/tests/testblockutil.nim
+++ b/tests/testblockutil.nim
@@ -26,7 +26,7 @@ const
   MockPrivKeys* = MockPrivKeysT()
   MockPubKeys* = MockPubKeysT()
 
-# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/tests/core/pyspec/eth2spec/test/helpers/keys.py
+# https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/tests/core/pyspec/eth2spec/test/helpers/keys.py
 func `[]`*(_: MockPrivKeysT, index: ValidatorIndex|uint64): ValidatorPrivKey =
   # 0 is not a valid BLS private key - 1000 helps interop with rust BLS library,
   # lighthouse. EF tests use 1 instead of 1000.
@@ -268,7 +268,7 @@ func makeAttestationData*(
     "Computed epoch was " & $slot.epoch &
     "  while the state current_epoch was " & $current_epoch
 
-  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.0/specs/phase0/validator.md#attestation-data
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.1/specs/phase0/validator.md#attestation-data
   AttestationData(
     slot: slot,
     index: committee_index.uint64,