diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8475618fd..a336e5723 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 name: Nimbus CI
 on:
   push:
@@ -293,3 +303,16 @@ jobs:
           # popd
           make ${DEFAULT_MAKE_FLAGS} test
 
+  lint:
+    name: "Lint"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 2  # In PR, has extra merge commit: ^1 = PR, ^2 = base
+
+      - name: Check copyright year
+        if: ${{ !cancelled() }} && github.event_name == 'pull_request'
+        run: |
+          bash scripts/check_copyright_year.sh
diff --git a/config.nims b/config.nims
index 981feeb4a..1c6f1d231 100644
--- a/config.nims
+++ b/config.nims
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import strutils
 
 const currentDir = currentSourcePath()[0 .. ^(len("config.nims") + 1)]
diff --git a/docker/dist/Dockerfile.amd64 b/docker/dist/Dockerfile.amd64
index 873ac0d20..0986789f8 100644
--- a/docker/dist/Dockerfile.amd64
+++ b/docker/dist/Dockerfile.amd64
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # The build is reproducible only if this base image stays the same.
 FROM statusteam/nimbus-eth1:dist_base_eth1_20220326074403@sha256:5c1d2e982d404c08f6bba1f0cc1a678bffae3f6cee80a679edaa0b5e985dc05d
 
diff --git a/docker/dist/Dockerfile.arm b/docker/dist/Dockerfile.arm
index 9b740a8d7..dcee8d404 100644
--- a/docker/dist/Dockerfile.arm
+++ b/docker/dist/Dockerfile.arm
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # The build is reproducible only if this base image stays the same.
 # FROM statusteam/nimbus_beacon_node:dist_base_20210310012752_arm_v2@sha256:65919842dc7e17386399ae12b175e9996f5ef038ad6e228000392a1ff6465082
 FROM statusteam/nimbus-eth1:dist_base_eth1_20220324084342_arm
diff --git a/docker/dist/Dockerfile.arm64 b/docker/dist/Dockerfile.arm64
index c8cdffd9b..00f37f5c5 100644
--- a/docker/dist/Dockerfile.arm64
+++ b/docker/dist/Dockerfile.arm64
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # The build is reproducible only if this base image stays the same.
 FROM statusteam/nimbus-eth1:dist_base_eth1_20220326080423_arm64@sha256:8701b2994faa5cb03bcca69bc521ec128d3da02e3443843df272c7f1855ccac7
 
diff --git a/docker/dist/Dockerfile.macos b/docker/dist/Dockerfile.macos
index 4a5b36dc3..1822c927e 100644
--- a/docker/dist/Dockerfile.macos
+++ b/docker/dist/Dockerfile.macos
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # The build is reproducible only if this base image stays the same.
 FROM statusteam/nimbus-eth1:dist_base_eth1_20220326081110_macos@sha256:229eb12e0c1ce94fde18916c4620bb83ef906d24443d1dc02ce86f2a55af4eb8
 
diff --git a/docker/dist/Dockerfile.macos-arm64 b/docker/dist/Dockerfile.macos-arm64
index 5b409e912..a83379951 100644
--- a/docker/dist/Dockerfile.macos-arm64
+++ b/docker/dist/Dockerfile.macos-arm64
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # The build is reproducible only if this base image stays the same.
 FROM statusteam/nimbus-eth1:dist_base_eth1_20220326081110_macos@sha256:229eb12e0c1ce94fde18916c4620bb83ef906d24443d1dc02ce86f2a55af4eb8
 
diff --git a/docker/dist/Dockerfile.win64 b/docker/dist/Dockerfile.win64
index 1f010ad4a..74873dffc 100644
--- a/docker/dist/Dockerfile.win64
+++ b/docker/dist/Dockerfile.win64
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # The build is reproducible only if this base image stays the same.
 FROM statusteam/nimbus-eth1:dist_base_eth1_20220326081622_win64@sha256:d88d198a98a163bae6d76245b0359c8860198f63e32c431c99c3dbb8dc1de28a
 
diff --git a/docker/dist/base_image/Dockerfile.amd64 b/docker/dist/base_image/Dockerfile.amd64
index 64b258e76..6d1f6b00c 100644
--- a/docker/dist/base_image/Dockerfile.amd64
+++ b/docker/dist/base_image/Dockerfile.amd64
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # This Docker image can change from one build to another, because the upstream
 # Debian/Ubuntu package index is continuously updated and we have to run
 # `apt-get update` in here.
diff --git a/docker/dist/base_image/Dockerfile.arm b/docker/dist/base_image/Dockerfile.arm
index 1aebaf662..85095f9e2 100644
--- a/docker/dist/base_image/Dockerfile.arm
+++ b/docker/dist/base_image/Dockerfile.arm
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # This Docker image can change from one build to another, because the upstream
 # Debian/Ubuntu package index is continuously updated and we have to run
 # `apt-get update` in here.
diff --git a/docker/dist/base_image/Dockerfile.arm64 b/docker/dist/base_image/Dockerfile.arm64
index d6ec6ddb6..a74e5dcd5 100644
--- a/docker/dist/base_image/Dockerfile.arm64
+++ b/docker/dist/base_image/Dockerfile.arm64
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # This Docker image can change from one build to another, because the upstream
 # Debian/Ubuntu package index is continuously updated and we have to run
 # `apt-get update` in here.
diff --git a/docker/dist/base_image/Dockerfile.macos b/docker/dist/base_image/Dockerfile.macos
index 8b606a547..6a1ae3320 100644
--- a/docker/dist/base_image/Dockerfile.macos
+++ b/docker/dist/base_image/Dockerfile.macos
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # This Docker image can change from one build to another, because the upstream
 # Debian/Ubuntu package index is continuously updated and we have to run
 # `apt-get update` in here.
diff --git a/docker/dist/base_image/Dockerfile.win64 b/docker/dist/base_image/Dockerfile.win64
index eda9f1fb8..2dfdab531 100644
--- a/docker/dist/base_image/Dockerfile.win64
+++ b/docker/dist/base_image/Dockerfile.win64
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # This Docker image can change from one build to another, because the upstream
 # Debian/Ubuntu package index is continuously updated and we have to run
 # `apt-get update` in here.
diff --git a/docker/dist/base_image/build_osxcross.sh b/docker/dist/base_image/build_osxcross.sh
index e65384a15..73567e09a 100755
--- a/docker/dist/base_image/build_osxcross.sh
+++ b/docker/dist/base_image/build_osxcross.sh
@@ -1,5 +1,15 @@
 #!/bin/bash
 
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 set -e
 
 
diff --git a/docker/dist/binaries/Dockerfile.amd64 b/docker/dist/binaries/Dockerfile.amd64
index ef389c596..0ae9f3820 100644
--- a/docker/dist/binaries/Dockerfile.amd64
+++ b/docker/dist/binaries/Dockerfile.amd64
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 FROM debian:bullseye-slim
 
 SHELL ["/bin/bash", "-c"]
diff --git a/docker/dist/binaries/Dockerfile.arm b/docker/dist/binaries/Dockerfile.arm
index 989f4150f..d70255c97 100644
--- a/docker/dist/binaries/Dockerfile.arm
+++ b/docker/dist/binaries/Dockerfile.arm
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 FROM arm32v7/debian:bullseye-slim
 
 SHELL ["/bin/bash", "-c"]
diff --git a/docker/dist/binaries/Dockerfile.arm64 b/docker/dist/binaries/Dockerfile.arm64
index ead9d0f1a..adb40c8db 100644
--- a/docker/dist/binaries/Dockerfile.arm64
+++ b/docker/dist/binaries/Dockerfile.arm64
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 FROM arm64v8/debian:bullseye-slim
 
 SHELL ["/bin/bash", "-c"]
diff --git a/env.sh b/env.sh
index f90ba9a74..464aaf860 100755
--- a/env.sh
+++ b/env.sh
@@ -1,5 +1,15 @@
 #!/bin/bash
 
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # We use ${BASH_SOURCE[0]} instead of $0 to allow sourcing this file
 # and we fall back to a Zsh-specific special var to also support Zsh.
 REL_PATH="$(dirname ${BASH_SOURCE[0]:-${(%):-%x}})"
diff --git a/examples/decompile_smart_contract.nim b/examples/decompile_smart_contract.nim
index 881eea5cc..4ff268801 100644
--- a/examples/decompile_smart_contract.nim
+++ b/examples/decompile_smart_contract.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import ../nimbus/vm/code_stream, strformat
 
 var c = newCodeStreamFromUnescaped("0x6003600202600055")
diff --git a/hive_integration/nodocker/build_sims.sh b/hive_integration/nodocker/build_sims.sh
index d880d6a2c..6bf65d050 100644
--- a/hive_integration/nodocker/build_sims.sh
+++ b/hive_integration/nodocker/build_sims.sh
@@ -1,5 +1,15 @@
 #!/usr/bin/env bash
 
+# Nimbus
+# Copyright (c) 2021-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 set -e
 SIM_DIR="hive_integration/nodocker"
 USE_SYSTEM_NIM=1
diff --git a/hive_integration/nodocker/engine/auths_tests.nim b/hive_integration/nodocker/engine/auths_tests.nim
index 03b241636..81d309a50 100644
--- a/hive_integration/nodocker/engine/auths_tests.nim
+++ b/hive_integration/nodocker/engine/auths_tests.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[base64, times, strutils],
   test_env,
diff --git a/hive_integration/nodocker/engine/base_spec.nim b/hive_integration/nodocker/engine/base_spec.nim
index 91e7e2260..0a6a670c3 100644
--- a/hive_integration/nodocker/engine/base_spec.nim
+++ b/hive_integration/nodocker/engine/base_spec.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[options],
   eth/common,
diff --git a/hive_integration/nodocker/engine/cancun/blobs.nim b/hive_integration/nodocker/engine/cancun/blobs.nim
index d1551bad0..a5f472a30 100644
--- a/hive_integration/nodocker/engine/cancun/blobs.nim
+++ b/hive_integration/nodocker/engine/cancun/blobs.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   eth/common/eth_types,
   stint,
diff --git a/hive_integration/nodocker/engine/cancun/customizer.nim b/hive_integration/nodocker/engine/cancun/customizer.nim
index cd91d989b..2d3db84f2 100644
--- a/hive_integration/nodocker/engine/cancun/customizer.nim
+++ b/hive_integration/nodocker/engine/cancun/customizer.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[options, strutils, typetraits, random],
   stew/byteutils,
diff --git a/hive_integration/nodocker/engine/cancun/helpers.nim b/hive_integration/nodocker/engine/cancun/helpers.nim
index 282e81305..b5b7c3bc5 100644
--- a/hive_integration/nodocker/engine/cancun/helpers.nim
+++ b/hive_integration/nodocker/engine/cancun/helpers.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[tables, strutils, typetraits],
   stint,
diff --git a/hive_integration/nodocker/engine/cancun/step_desc.nim b/hive_integration/nodocker/engine/cancun/step_desc.nim
index dacbab93f..ca4285092 100644
--- a/hive_integration/nodocker/engine/cancun/step_desc.nim
+++ b/hive_integration/nodocker/engine/cancun/step_desc.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   ../types,
   ../test_env,
diff --git a/hive_integration/nodocker/engine/cancun/step_devp2p_peering.nim b/hive_integration/nodocker/engine/cancun/step_devp2p_peering.nim
index cb635d0a6..381174b56 100644
--- a/hive_integration/nodocker/engine/cancun/step_devp2p_peering.nim
+++ b/hive_integration/nodocker/engine/cancun/step_devp2p_peering.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   ./step
 
diff --git a/hive_integration/nodocker/engine/cancun/step_devp2p_pooledtx.nim b/hive_integration/nodocker/engine/cancun/step_devp2p_pooledtx.nim
index 7237ca969..17347a6e4 100644
--- a/hive_integration/nodocker/engine/cancun/step_devp2p_pooledtx.nim
+++ b/hive_integration/nodocker/engine/cancun/step_devp2p_pooledtx.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   eth/common,
diff --git a/hive_integration/nodocker/engine/cancun/step_launch_client.nim b/hive_integration/nodocker/engine/cancun/step_launch_client.nim
index bfe4778b7..0e39e3e42 100644
--- a/hive_integration/nodocker/engine/cancun/step_launch_client.nim
+++ b/hive_integration/nodocker/engine/cancun/step_launch_client.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   ./step_desc,
diff --git a/hive_integration/nodocker/engine/cancun/step_newpayloads.nim b/hive_integration/nodocker/engine/cancun/step_newpayloads.nim
index 005ab13b8..0aefd95f8 100644
--- a/hive_integration/nodocker/engine/cancun/step_newpayloads.nim
+++ b/hive_integration/nodocker/engine/cancun/step_newpayloads.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   chronicles,
diff --git a/hive_integration/nodocker/engine/cancun/step_paralel.nim b/hive_integration/nodocker/engine/cancun/step_paralel.nim
index e221dc3d2..de4a4c7c6 100644
--- a/hive_integration/nodocker/engine/cancun/step_paralel.nim
+++ b/hive_integration/nodocker/engine/cancun/step_paralel.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   ./step
 
diff --git a/hive_integration/nodocker/engine/cancun/step_sendblobtx.nim b/hive_integration/nodocker/engine/cancun/step_sendblobtx.nim
index 97b1a5739..ebf1fb40f 100644
--- a/hive_integration/nodocker/engine/cancun/step_sendblobtx.nim
+++ b/hive_integration/nodocker/engine/cancun/step_sendblobtx.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   eth/common,
diff --git a/hive_integration/nodocker/engine/cancun/step_sendmodpayload.nim b/hive_integration/nodocker/engine/cancun/step_sendmodpayload.nim
index bed5d5bc8..27436d5bf 100644
--- a/hive_integration/nodocker/engine/cancun/step_sendmodpayload.nim
+++ b/hive_integration/nodocker/engine/cancun/step_sendmodpayload.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   chronicles,
diff --git a/hive_integration/nodocker/engine/cancun_tests.nim b/hive_integration/nodocker/engine/cancun_tests.nim
index a8cf3fef9..cb25aa51e 100644
--- a/hive_integration/nodocker/engine/cancun_tests.nim
+++ b/hive_integration/nodocker/engine/cancun_tests.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[tables, math, strutils],
   chronos,
diff --git a/hive_integration/nodocker/engine/client_pool.nim b/hive_integration/nodocker/engine/client_pool.nim
index 204cd4302..a2831bf48 100644
--- a/hive_integration/nodocker/engine/client_pool.nim
+++ b/hive_integration/nodocker/engine/client_pool.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   json_rpc/rpcclient,
   ./engine_env
diff --git a/hive_integration/nodocker/engine/clmock.nim b/hive_integration/nodocker/engine/clmock.nim
index 13befea80..607fed39d 100644
--- a/hive_integration/nodocker/engine/clmock.nim
+++ b/hive_integration/nodocker/engine/clmock.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[tables],
   chronicles,
diff --git a/hive_integration/nodocker/engine/engine/bad_hash.nim b/hive_integration/nodocker/engine/engine/bad_hash.nim
index b2c2d8738..0c5349058 100644
--- a/hive_integration/nodocker/engine/engine/bad_hash.nim
+++ b/hive_integration/nodocker/engine/engine/bad_hash.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   chronicles,
diff --git a/hive_integration/nodocker/engine/engine/engine_spec.nim b/hive_integration/nodocker/engine/engine/engine_spec.nim
index 98d22c4ab..a98ef1c66 100644
--- a/hive_integration/nodocker/engine/engine/engine_spec.nim
+++ b/hive_integration/nodocker/engine/engine/engine_spec.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   ../types,
   ../test_env,
diff --git a/hive_integration/nodocker/engine/engine/fork_id.nim b/hive_integration/nodocker/engine/engine/fork_id.nim
index cd333e22f..fd1d5169a 100644
--- a/hive_integration/nodocker/engine/engine/fork_id.nim
+++ b/hive_integration/nodocker/engine/engine/fork_id.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   ./engine_spec
diff --git a/hive_integration/nodocker/engine/engine/forkchoice.nim b/hive_integration/nodocker/engine/engine/forkchoice.nim
index ce0052c3e..f17db877c 100644
--- a/hive_integration/nodocker/engine/engine/forkchoice.nim
+++ b/hive_integration/nodocker/engine/engine/forkchoice.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   ./engine_spec
diff --git a/hive_integration/nodocker/engine/engine/invalid_ancestor.nim b/hive_integration/nodocker/engine/engine/invalid_ancestor.nim
index bb595b32a..3531fbfa5 100644
--- a/hive_integration/nodocker/engine/engine/invalid_ancestor.nim
+++ b/hive_integration/nodocker/engine/engine/invalid_ancestor.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   chronicles,
diff --git a/hive_integration/nodocker/engine/engine/invalid_payload.nim b/hive_integration/nodocker/engine/engine/invalid_payload.nim
index 853367651..3508436ae 100644
--- a/hive_integration/nodocker/engine/engine/invalid_payload.nim
+++ b/hive_integration/nodocker/engine/engine/invalid_payload.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   chronicles,
diff --git a/hive_integration/nodocker/engine/engine/misc.nim b/hive_integration/nodocker/engine/engine/misc.nim
index 9f0d4f73b..eb24339f6 100644
--- a/hive_integration/nodocker/engine/engine/misc.nim
+++ b/hive_integration/nodocker/engine/engine/misc.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   ./engine_spec,
   ../../../../nimbus/common/hardforks
diff --git a/hive_integration/nodocker/engine/engine/payload_attributes.nim b/hive_integration/nodocker/engine/engine/payload_attributes.nim
index 700f4878a..4b7174d3a 100644
--- a/hive_integration/nodocker/engine/engine/payload_attributes.nim
+++ b/hive_integration/nodocker/engine/engine/payload_attributes.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   chronicles,
diff --git a/hive_integration/nodocker/engine/engine/payload_execution.nim b/hive_integration/nodocker/engine/engine/payload_execution.nim
index bfd927ca8..5b3b56bbe 100644
--- a/hive_integration/nodocker/engine/engine/payload_execution.nim
+++ b/hive_integration/nodocker/engine/engine/payload_execution.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   ./engine_spec
diff --git a/hive_integration/nodocker/engine/engine/payload_id.nim b/hive_integration/nodocker/engine/engine/payload_id.nim
index a25c3dec7..da211a836 100644
--- a/hive_integration/nodocker/engine/engine/payload_id.nim
+++ b/hive_integration/nodocker/engine/engine/payload_id.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   ./engine_spec
diff --git a/hive_integration/nodocker/engine/engine/prev_randao.nim b/hive_integration/nodocker/engine/engine/prev_randao.nim
index fb488bb09..f6d74786d 100644
--- a/hive_integration/nodocker/engine/engine/prev_randao.nim
+++ b/hive_integration/nodocker/engine/engine/prev_randao.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   ./engine_spec
diff --git a/hive_integration/nodocker/engine/engine/reorg.nim b/hive_integration/nodocker/engine/engine/reorg.nim
index 98c08dc14..79878cdd6 100644
--- a/hive_integration/nodocker/engine/engine/reorg.nim
+++ b/hive_integration/nodocker/engine/engine/reorg.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   chronicles,
diff --git a/hive_integration/nodocker/engine/engine/rpc.nim b/hive_integration/nodocker/engine/engine/rpc.nim
index 033c2506e..bec9250f0 100644
--- a/hive_integration/nodocker/engine/engine/rpc.nim
+++ b/hive_integration/nodocker/engine/engine/rpc.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   ./engine_spec
diff --git a/hive_integration/nodocker/engine/engine/suggested_fee_recipient.nim b/hive_integration/nodocker/engine/engine/suggested_fee_recipient.nim
index 98e3dc4b9..6d2f54be9 100644
--- a/hive_integration/nodocker/engine/engine/suggested_fee_recipient.nim
+++ b/hive_integration/nodocker/engine/engine/suggested_fee_recipient.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils,
   ./engine_spec
diff --git a/hive_integration/nodocker/engine/engine/versioning.nim b/hive_integration/nodocker/engine/engine/versioning.nim
index 8fb3d903b..f0135d2ad 100644
--- a/hive_integration/nodocker/engine/engine/versioning.nim
+++ b/hive_integration/nodocker/engine/engine/versioning.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # Test versioning of the Engine API methods
 import
   std/strutils,
diff --git a/hive_integration/nodocker/engine/engine_callsigs.nim b/hive_integration/nodocker/engine/engine_callsigs.nim
index 8059f80f1..bab5b09b9 100644
--- a/hive_integration/nodocker/engine/engine_callsigs.nim
+++ b/hive_integration/nodocker/engine/engine_callsigs.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   web3/ethtypes,
   web3/engine_api_types,
diff --git a/hive_integration/nodocker/engine/engine_client.nim b/hive_integration/nodocker/engine/engine_client.nim
index eda5f93c0..0ec38ad9b 100644
--- a/hive_integration/nodocker/engine/engine_client.nim
+++ b/hive_integration/nodocker/engine/engine_client.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[times, json, strutils],
   stew/byteutils,
diff --git a/hive_integration/nodocker/engine/engine_env.nim b/hive_integration/nodocker/engine/engine_env.nim
index 7535e7d54..59500aeab 100644
--- a/hive_integration/nodocker/engine/engine_env.nim
+++ b/hive_integration/nodocker/engine/engine_env.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/os,
   eth/keys,
diff --git a/hive_integration/nodocker/engine/engine_sim.nim b/hive_integration/nodocker/engine/engine_sim.nim
index 16ec93596..b0da8ce92 100644
--- a/hive_integration/nodocker/engine/engine_sim.nim
+++ b/hive_integration/nodocker/engine/engine_sim.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/times,
   chronicles,
diff --git a/hive_integration/nodocker/engine/engine_tests.nim b/hive_integration/nodocker/engine/engine_tests.nim
index 584d890d1..32481efb8 100644
--- a/hive_integration/nodocker/engine/engine_tests.nim
+++ b/hive_integration/nodocker/engine/engine_tests.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   eth/common/eth_types,
   ./engine/engine_spec,
diff --git a/hive_integration/nodocker/engine/exchange_cap_tests.nim b/hive_integration/nodocker/engine/exchange_cap_tests.nim
index 4348919b0..671e89763 100644
--- a/hive_integration/nodocker/engine/exchange_cap_tests.nim
+++ b/hive_integration/nodocker/engine/exchange_cap_tests.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[options],
   eth/common/eth_types,
diff --git a/hive_integration/nodocker/engine/helper.nim b/hive_integration/nodocker/engine/helper.nim
index b0398e11b..2251ddae9 100644
--- a/hive_integration/nodocker/engine/helper.nim
+++ b/hive_integration/nodocker/engine/helper.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   eth/[common, rlp],
   ../../../nimbus/beacon/execution_types,
diff --git a/hive_integration/nodocker/engine/test_env.nim b/hive_integration/nodocker/engine/test_env.nim
index 7fe2aa80b..d1316f661 100644
--- a/hive_integration/nodocker/engine/test_env.nim
+++ b/hive_integration/nodocker/engine/test_env.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   chronicles,
   eth/keys,
diff --git a/hive_integration/nodocker/engine/tx_sender.nim b/hive_integration/nodocker/engine/tx_sender.nim
index aa38c8d4c..3eae7fbf0 100644
--- a/hive_integration/nodocker/engine/tx_sender.nim
+++ b/hive_integration/nodocker/engine/tx_sender.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[tables],
   eth/keys,
diff --git a/hive_integration/nodocker/engine/types.nim b/hive_integration/nodocker/engine/types.nim
index c379ab493..2ae59a6c1 100644
--- a/hive_integration/nodocker/engine/types.nim
+++ b/hive_integration/nodocker/engine/types.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[options, typetraits, strutils],
   eth/common,
diff --git a/hive_integration/nodocker/engine/withdrawal_tests.nim b/hive_integration/nodocker/engine/withdrawal_tests.nim
index 71fa4779a..0491716f0 100644
--- a/hive_integration/nodocker/engine/withdrawal_tests.nim
+++ b/hive_integration/nodocker/engine/withdrawal_tests.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   withdrawals/wd_base_spec,
   withdrawals/wd_block_value_spec,
diff --git a/hive_integration/nodocker/engine/withdrawals/wd_base_spec.nim b/hive_integration/nodocker/engine/withdrawals/wd_base_spec.nim
index 42672029b..a489eed11 100644
--- a/hive_integration/nodocker/engine/withdrawals/wd_base_spec.nim
+++ b/hive_integration/nodocker/engine/withdrawals/wd_base_spec.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[options],
   stint,
diff --git a/hive_integration/nodocker/engine/withdrawals/wd_block_value_spec.nim b/hive_integration/nodocker/engine/withdrawals/wd_block_value_spec.nim
index 6568c37e9..aa745c247 100644
--- a/hive_integration/nodocker/engine/withdrawals/wd_block_value_spec.nim
+++ b/hive_integration/nodocker/engine/withdrawals/wd_block_value_spec.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   stint,
   chronicles,
diff --git a/hive_integration/nodocker/engine/withdrawals/wd_history.nim b/hive_integration/nodocker/engine/withdrawals/wd_history.nim
index 8924ff459..067e3d6fd 100644
--- a/hive_integration/nodocker/engine/withdrawals/wd_history.nim
+++ b/hive_integration/nodocker/engine/withdrawals/wd_history.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[tables, sets, strutils],
   eth/common/eth_types,
diff --git a/hive_integration/nodocker/engine/withdrawals/wd_max_init_code_spec.nim b/hive_integration/nodocker/engine/withdrawals/wd_max_init_code_spec.nim
index 1a488bdfb..b67f4c108 100644
--- a/hive_integration/nodocker/engine/withdrawals/wd_max_init_code_spec.nim
+++ b/hive_integration/nodocker/engine/withdrawals/wd_max_init_code_spec.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/typetraits,
   chronos,
diff --git a/hive_integration/nodocker/engine/withdrawals/wd_payload_body_spec.nim b/hive_integration/nodocker/engine/withdrawals/wd_payload_body_spec.nim
index e7d431002..3fa6ed9b8 100644
--- a/hive_integration/nodocker/engine/withdrawals/wd_payload_body_spec.nim
+++ b/hive_integration/nodocker/engine/withdrawals/wd_payload_body_spec.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   chronos,
   ./wd_base_spec,
diff --git a/hive_integration/nodocker/engine/withdrawals/wd_reorg_spec.nim b/hive_integration/nodocker/engine/withdrawals/wd_reorg_spec.nim
index bdb88f342..14f4d4381 100644
--- a/hive_integration/nodocker/engine/withdrawals/wd_reorg_spec.nim
+++ b/hive_integration/nodocker/engine/withdrawals/wd_reorg_spec.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/tables,
   stint,
diff --git a/hive_integration/nodocker/engine/withdrawals/wd_sync_spec.nim b/hive_integration/nodocker/engine/withdrawals/wd_sync_spec.nim
index 5b613ac3c..50a73ed92 100644
--- a/hive_integration/nodocker/engine/withdrawals/wd_sync_spec.nim
+++ b/hive_integration/nodocker/engine/withdrawals/wd_sync_spec.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   chronicles,
   json_rpc/rpcclient,
diff --git a/hive_integration/nodocker/pyspec/test_env.nim b/hive_integration/nodocker/pyspec/test_env.nim
index 70e75cc9a..71698bc69 100644
--- a/hive_integration/nodocker/pyspec/test_env.nim
+++ b/hive_integration/nodocker/pyspec/test_env.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[json],
   eth/p2p as eth_p2p,
diff --git a/nimbus.nims b/nimbus.nims
new file mode 100644
index 000000000..0bfa11823
--- /dev/null
+++ b/nimbus.nims
@@ -0,0 +1,121 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
+mode = ScriptMode.Verbose
+
+packageName   = "nimbus"
+version       = "0.1.0"
+author        = "Status Research & Development GmbH"
+description   = "An Ethereum 2.0 Sharding Client for Resource-Restricted Devices"
+license       = "Apache License 2.0"
+skipDirs      = @["tests", "examples"]
+# we can't have the result of a custom task in the "bin" var - https://github.com/nim-lang/nimble/issues/542
+# bin           = @["build/nimbus"]
+
+requires "nim >= 1.2.0",
+  "bncurve",
+  "chronicles",
+  "chronos",
+  "eth",
+  "json_rpc",
+  "libbacktrace",
+  "nimcrypto",
+  "stew",
+  "stint",
+  "rocksdb",
+  "ethash",
+  "blscurve",
+  "evmc",
+  "web3"
+
+binDir = "build"
+
+when declared(namedBin):
+  namedBin = {
+    "nimbus/nimbus": "nimbus",
+    "fluffy/fluffy": "fluffy",
+    "lc_proxy/lc_proxy": "lc_proxy",
+    "fluffy/tools/portalcli": "portalcli",
+  }.toTable()
+
+proc buildBinary(name: string, srcDir = "./", params = "", lang = "c") =
+  if not dirExists "build":
+    mkDir "build"
+  # allow something like "nim nimbus --verbosity:0 --hints:off nimbus.nims"
+  var extra_params = params
+  for i in 2..<paramCount():
+    extra_params &= " " & paramStr(i)
+  exec "nim " & lang & " --out:build/" & name & " " & extra_params & " " & srcDir & name & ".nim"
+
+proc test(path: string, name: string, params = "", lang = "c") =
+  # Verify stack usage is kept low by setting 750k stack limit in tests.
+  const stackLimitKiB = 750
+  when not defined(windows):
+    const (buildOption, runPrefix) = ("", "ulimit -s " & $stackLimitKiB & " && ")
+  else:
+    # No `ulimit` in Windows.  `ulimit -s` in Bash is accepted but has no effect.
+    # See https://public-inbox.org/git/alpine.DEB.2.21.1.1709131448390.4132@virtualbox/
+    # Also, the command passed to NimScript `exec` on Windows is not a shell script.
+    # Instead, we can set stack size at link time.
+    const (buildOption, runPrefix) =
+      (" -d:windowsNoSetStack --passL:-Wl,--stack," & $(stackLimitKiB * 1024), "")
+
+  buildBinary name, (path & "/"), params & buildOption
+  exec runPrefix & "build/" & name
+
+task test, "Run tests":
+  test "tests", "all_tests", "-d:chronicles_log_level=ERROR -d:unittest2DisableParamFiltering"
+
+task test_rocksdb, "Run rocksdb tests":
+  test "tests/db", "test_kvstore_rocksdb", "-d:chronicles_log_level=ERROR -d:unittest2DisableParamFiltering"
+
+task test_evm, "Run EVM tests":
+  test "tests", "evm_tests", "-d:chronicles_log_level=ERROR -d:unittest2DisableParamFiltering"
+
+## Fluffy tasks
+
+task fluffy, "Build fluffy":
+  buildBinary "fluffy", "fluffy/", "-d:chronicles_log_level=TRACE -d:chronosStrictException -d:PREFER_BLST_SHA256=false"
+
+task lc_bridge, "Build light client bridge":
+  buildBinary "beacon_light_client_bridge", "fluffy/", "-d:chronicles_log_level=TRACE -d:chronosStrictException -d:PREFER_BLST_SHA256=false -d:libp2p_pki_schemes=secp256k1"
+
+task fluffy_test, "Run fluffy tests":
+  # Need the nimbus_db_backend in state network tests as we need a Hexary to
+  # start from, even though it only uses the MemoryDb.
+  test "fluffy/tests/portal_spec_tests/mainnet", "all_fluffy_portal_spec_tests", "-d:chronicles_log_level=ERROR -d:chronosStrictException -d:nimbus_db_backend=sqlite -d:PREFER_BLST_SHA256=false"
+  # Running tests with a low `mergeBlockNumber` to make the tests faster.
+  # Using the real mainnet merge block number is not realistic for these tests.
+  test "fluffy/tests", "all_fluffy_tests", "-d:chronicles_log_level=ERROR -d:chronosStrictException -d:nimbus_db_backend=sqlite -d:PREFER_BLST_SHA256=false -d:mergeBlockNumber:38130"
+  # test "fluffy/tests/beacon_light_client_tests", "all_beacon_light_client_tests", "-d:chronicles_log_level=ERROR -d:chronosStrictException -d:nimbus_db_backend=sqlite -d:PREFER_BLST_SHA256=false"
+
+task fluffy_tools, "Build fluffy tools":
+  buildBinary "beacon_chain_bridge", "fluffy/tools/bridge/", "-d:chronicles_log_level=TRACE -d:chronosStrictException -d:PREFER_BLST_SHA256=false -d:libp2p_pki_schemes=secp256k1"
+  buildBinary "eth_data_exporter", "fluffy/tools/", "-d:chronicles_log_level=TRACE -d:chronosStrictException -d:PREFER_BLST_SHA256=false"
+  buildBinary "content_verifier", "fluffy/tools/", "-d:chronicles_log_level=TRACE -d:chronosStrictException -d:PREFER_BLST_SHA256=false"
+  buildBinary "blockwalk", "fluffy/tools/", "-d:chronicles_log_level=TRACE -d:chronosStrictException"
+  buildBinary "portalcli", "fluffy/tools/", "-d:chronicles_log_level=TRACE -d:chronosStrictException -d:PREFER_BLST_SHA256=false"
+
+task utp_test_app, "Build uTP test app":
+  buildBinary "utp_test_app", "fluffy/tools/utp_testing/", "-d:chronicles_log_level=TRACE -d:chronosStrictException"
+
+task utp_test, "Run uTP integration tests":
+  test "fluffy/tools/utp_testing", "utp_test", "-d:chronicles_log_level=ERROR -d:chronosStrictException"
+
+task fluffy_test_portal_testnet, "Build test_portal_testnet":
+  buildBinary "test_portal_testnet", "fluffy/scripts/", "-d:chronicles_log_level=DEBUG -d:chronosStrictException -d:unittest2DisableParamFiltering -d:PREFER_BLST_SHA256=false"
+
+## Nimbus Verified Proxy tasks
+
+task nimbus_verified_proxy, "Build Nimbus verified proxy":
+  buildBinary "nimbus_verified_proxy", "nimbus_verified_proxy/", "-d:chronicles_log_level=TRACE -d:chronosStrictException -d:PREFER_BLST_SHA256=false -d:libp2p_pki_schemes=secp256k1"
+
+task nimbus_verified_proxy_test, "Run Nimbus verified proxy tests":
+  test "nimbus_verified_proxy/tests", "test_proof_validation", "-d:chronicles_log_level=ERROR -d:chronosStrictException -d:nimbus_db_backend=sqlite -d:PREFER_BLST_SHA256=false"
diff --git a/nimbus/common/genesis.nim b/nimbus/common/genesis.nim
index 2fa11668a..37cf90229 100644
--- a/nimbus/common/genesis.nim
+++ b/nimbus/common/genesis.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/tables,
   eth/[common, eip1559],
diff --git a/nimbus/common/genesis_alloc.nim b/nimbus/common/genesis_alloc.nim
index 7c7767dab..03b4bf17c 100644
--- a/nimbus/common/genesis_alloc.nim
+++ b/nimbus/common/genesis_alloc.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # Constants containing the genesis allocation of built-in genesis blocks.
 # Their content is an RLP-encoded list of (address, balance) tuples.
 
diff --git a/nimbus/constants.nim b/nimbus/constants.nim
index 9da071cc6..ca43ea4e6 100644
--- a/nimbus/constants.nim
+++ b/nimbus/constants.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 {.used.}
 
 import
diff --git a/nimbus/core/dao.nim b/nimbus/core/dao.nim
index 5068f2c41..c93870b08 100644
--- a/nimbus/core/dao.nim
+++ b/nimbus/core/dao.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import eth/common, stew/byteutils, ../db/accounts_cache
 
 const
diff --git a/nimbus/core/pow/difficulty.nim b/nimbus/core/pow/difficulty.nim
index 363f51fd7..e6fc3e33b 100644
--- a/nimbus/core/pow/difficulty.nim
+++ b/nimbus/core/pow/difficulty.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   ../../common/common
 
diff --git a/nimbus/core/tx_pool.nim b/nimbus/core/tx_pool.nim
index c806f5f7e..e83378dd4 100644
--- a/nimbus/core/tx_pool.nim
+++ b/nimbus/core/tx_pool.nim
@@ -1,5 +1,5 @@
 # Nimbus
-# Copyright (c) 2018 Status Research & Development GmbH
+# Copyright (c) 2018-2023 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
 #    http://www.apache.org/licenses/LICENSE-2.0)
diff --git a/nimbus/core/tx_pool/tx_tasks/tx_packer.nim b/nimbus/core/tx_pool/tx_tasks/tx_packer.nim
index b0be72ce6..9fefe4948 100644
--- a/nimbus/core/tx_pool/tx_tasks/tx_packer.nim
+++ b/nimbus/core/tx_pool/tx_tasks/tx_packer.nim
@@ -1,5 +1,5 @@
 # Nimbus
-# Copyright (c) 2018 Status Research & Development GmbH
+# Copyright (c) 2018-2023 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
 #    http://www.apache.org/licenses/LICENSE-2.0)
diff --git a/nimbus/db/core_db/persistent.nim b/nimbus/db/core_db/persistent.nim
index 51f8de6cb..071359445 100644
--- a/nimbus/db/core_db/persistent.nim
+++ b/nimbus/db/core_db/persistent.nim
@@ -1,3 +1,6 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
 #    http://www.apache.org/licenses/LICENSE-2.0)
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
diff --git a/nimbus/db/distinct_tries.nim b/nimbus/db/distinct_tries.nim
index fb7ebca7c..342b678fe 100644
--- a/nimbus/db/distinct_tries.nim
+++ b/nimbus/db/distinct_tries.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # The point of this file is just to give a little more type-safety
 # and clarity to our use of SecureHexaryTrie, by having distinct
 # types for the big trie containing all the accounts and the little
diff --git a/nimbus/db/geth_db.nim b/nimbus/db/geth_db.nim
index c6d132bb3..49f312c5a 100644
--- a/nimbus/db/geth_db.nim
+++ b/nimbus/db/geth_db.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import eth/[rlp, common], core_db
 
 const
diff --git a/nimbus/db/incomplete_db.nim b/nimbus/db/incomplete_db.nim
index f7430f505..32ea6b9f3 100644
--- a/nimbus/db/incomplete_db.nim
+++ b/nimbus/db/incomplete_db.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 #[
 FIXME-Adam: I feel like this and distinct_tries should either be combined or more clearly separated.
 
diff --git a/nimbus/db/kvstore_rocksdb.nim b/nimbus/db/kvstore_rocksdb.nim
index ea5c8f01f..58244e90c 100644
--- a/nimbus/db/kvstore_rocksdb.nim
+++ b/nimbus/db/kvstore_rocksdb.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 {.push raises: [].}
 
 import
diff --git a/nimbus/db/ledger/,gitignore b/nimbus/db/ledger/.gitignore
similarity index 100%
rename from nimbus/db/ledger/,gitignore
rename to nimbus/db/ledger/.gitignore
diff --git a/nimbus/db/ledger/backend/accounts_cache_desc.nim b/nimbus/db/ledger/backend/accounts_cache_desc.nim
index 7e0ecb28f..2e9d026d9 100644
--- a/nimbus/db/ledger/backend/accounts_cache_desc.nim
+++ b/nimbus/db/ledger/backend/accounts_cache_desc.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   ../accounts_cache as impl,
   ../base/base_desc
diff --git a/nimbus/db/ledger/backend/accounts_ledger_desc.nim b/nimbus/db/ledger/backend/accounts_ledger_desc.nim
index 22d1c5f07..f8dd3f0f0 100644
--- a/nimbus/db/ledger/backend/accounts_ledger_desc.nim
+++ b/nimbus/db/ledger/backend/accounts_ledger_desc.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   ../accounts_ledger as impl,
   ../base/base_desc
diff --git a/nimbus/db/ledger/distinct_ledgers.nim b/nimbus/db/ledger/distinct_ledgers.nim
index 8d6e14a48..8627112aa 100644
--- a/nimbus/db/ledger/distinct_ledgers.nim
+++ b/nimbus/db/ledger/distinct_ledgers.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # The point of this file is just to give a little more type-safety
 # and clarity to our use of SecureHexaryTrie, by having distinct
 # types for the big trie containing all the accounts and the little
diff --git a/nimbus/db/notused/capturedb.nim b/nimbus/db/notused/capturedb.nim
index c87951c44..2dd9cf55e 100644
--- a/nimbus/db/notused/capturedb.nim
+++ b/nimbus/db/notused/capturedb.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import eth/trie/db
 
 type
diff --git a/nimbus/db/select_backend.nim b/nimbus/db/select_backend.nim
index 6e7432a21..7188c2608 100644
--- a/nimbus/db/select_backend.nim
+++ b/nimbus/db/select_backend.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import strutils, eth/db/kvstore
 
 export kvstore
diff --git a/nimbus/db/values_from_bytes.nim b/nimbus/db/values_from_bytes.nim
index 476ae06cf..0a9b490ad 100644
--- a/nimbus/db/values_from_bytes.nim
+++ b/nimbus/db/values_from_bytes.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # This code was duplicated enough times around the codebase
 # that it seemed worth factoring it out.
 
diff --git a/nimbus/evm/async/data_sources.nim b/nimbus/evm/async/data_sources.nim
index 72f425b6e..adc7d0399 100644
--- a/nimbus/evm/async/data_sources.nim
+++ b/nimbus/evm/async/data_sources.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/options,
   chronos,
diff --git a/nimbus/evm/async/data_sources/json_rpc_data_source.nim b/nimbus/evm/async/data_sources/json_rpc_data_source.nim
index 4530f0090..0c177001a 100644
--- a/nimbus/evm/async/data_sources/json_rpc_data_source.nim
+++ b/nimbus/evm/async/data_sources/json_rpc_data_source.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[sequtils, typetraits, options, times],
   chronicles,
diff --git a/nimbus/evm/async/operations.nim b/nimbus/evm/async/operations.nim
index 773c83bc0..dd1aaf201 100644
--- a/nimbus/evm/async/operations.nim
+++ b/nimbus/evm/async/operations.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   chronos,
   stint,
diff --git a/nimbus/evm/blake2b_f.nim b/nimbus/evm/blake2b_f.nim
index a4c956922..e3bd2d76b 100644
--- a/nimbus/evm/blake2b_f.nim
+++ b/nimbus/evm/blake2b_f.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import nimcrypto/utils
 
 # Blake2 `F` compression function
diff --git a/nimbus/evm/blscurve.nim b/nimbus/evm/blscurve.nim
index 80776d5b9..c6aeacc99 100644
--- a/nimbus/evm/blscurve.nim
+++ b/nimbus/evm/blscurve.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import blscurve/bls_backend, stint
 
 when BLS_BACKEND == Miracl:
diff --git a/nimbus/evm/evmc_helpers.nim b/nimbus/evm/evmc_helpers.nim
index b329267fc..c816f3770 100644
--- a/nimbus/evm/evmc_helpers.nim
+++ b/nimbus/evm/evmc_helpers.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   eth/common,
   stint,
diff --git a/nimbus/evm/map_to_curve_g1.nim b/nimbus/evm/map_to_curve_g1.nim
index 3759858fd..7b9005ee1 100644
--- a/nimbus/evm/map_to_curve_g1.nim
+++ b/nimbus/evm/map_to_curve_g1.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import blscurve/miracl/[common, milagro]
 
 # IETF Standard Draft: https://tools.ietf.org/html/draft-irtf-cfrg-hash-to-curve-10
diff --git a/nimbus/evm/modexp.nim b/nimbus/evm/modexp.nim
index c1f20c232..a91bb7902 100644
--- a/nimbus/evm/modexp.nim
+++ b/nimbus/evm/modexp.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/strutils
 
diff --git a/nimbus/evm/nimdoc.cfg b/nimbus/evm/nimdoc.cfg
index df141c1a4..fc16164cd 100644
--- a/nimbus/evm/nimdoc.cfg
+++ b/nimbus/evm/nimdoc.cfg
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2021-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # breaks circular import/include dependencies
 -d:kludge:2
 
diff --git a/nimbus/launcher.nim b/nimbus/launcher.nim
index 3563f60d1..988b1eb6f 100644
--- a/nimbus/launcher.nim
+++ b/nimbus/launcher.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import os, osproc, json
 
 when defined(windows):
diff --git a/nimbus/rpc/rpc_types.nim b/nimbus/rpc/rpc_types.nim
index 8be2b0595..8790a7e5e 100644
--- a/nimbus/rpc/rpc_types.nim
+++ b/nimbus/rpc/rpc_types.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   json_rpc/jsonmarshal,
   stew/byteutils,
diff --git a/nimbus/stateless_runner.nim b/nimbus/stateless_runner.nim
index 137c3c510..0e0e7130b 100644
--- a/nimbus/stateless_runner.nim
+++ b/nimbus/stateless_runner.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[options, times],
   chronicles,
diff --git a/nimbus/sync/protocol/les/flow_control.nim b/nimbus/sync/protocol/les/flow_control.nim
index 1dd07bf5e..1ebfe2598 100644
--- a/nimbus/sync/protocol/les/flow_control.nim
+++ b/nimbus/sync/protocol/les/flow_control.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[tables, sets],
   chronicles, chronos,
diff --git a/nimbus/sync/protocol/les/private/les_types.nim b/nimbus/sync/protocol/les/private/les_types.nim
index b6eae8785..be4fdec1e 100644
--- a/nimbus/sync/protocol/les/private/les_types.nim
+++ b/nimbus/sync/protocol/les/private/les_types.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[hashes, tables, sets],
   eth/common
diff --git a/nimbus/sync/protocol/les_protocol.nim b/nimbus/sync/protocol/les_protocol.nim
index d95f9506b..da41a397f 100644
--- a/nimbus/sync/protocol/les_protocol.nim
+++ b/nimbus/sync/protocol/les_protocol.nim
@@ -1,12 +1,12 @@
-#
-#                 Ethereum P2P
-#              (c) Copyright 2018
-#       Status Research & Development GmbH
-#
-#            Licensed under either of
-#  Apache License, version 2.0, (LICENSE-APACHEv2)
-#            MIT license (LICENSE-MIT)
-#
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
 
 import
   std/[times, tables, options, sets, hashes, strutils],
diff --git a/nimbus/sync/snap/worker/pass.nim b/nimbus/sync/snap/worker/pass.nim
index 2c7fe5539..d51a7f13e 100644
--- a/nimbus/sync/snap/worker/pass.nim
+++ b/nimbus/sync/snap/worker/pass.nim
@@ -1,10 +1,12 @@
+# Nimbus
+# Copyright (c) 2022-2023 Status Research & Development GmbH
+# Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
 #    http://www.apache.org/licenses/LICENSE-2.0)
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
 #    http://opensource.org/licenses/MIT)
-# at your option. This file may not be copied, modified, or distributed
-# except according to those terms.
-
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
 {.push raises: [].}
 
 import
diff --git a/nimbus/sync/snap/worker/pass/pass_desc.nim b/nimbus/sync/snap/worker/pass/pass_desc.nim
index 161cdea2e..7a145c3ca 100644
--- a/nimbus/sync/snap/worker/pass/pass_desc.nim
+++ b/nimbus/sync/snap/worker/pass/pass_desc.nim
@@ -1,9 +1,12 @@
+# Nimbus
+# Copyright (c) 2022-2023 Status Research & Development GmbH
+# Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
 #    http://www.apache.org/licenses/LICENSE-2.0)
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
 #    http://opensource.org/licenses/MIT)
-# at your option. This file may not be copied, modified, or distributed
-# except according to those terms.
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
 
 {.push raises: [].}
 
diff --git a/nimbus/tracer.nim b/nimbus/tracer.nim
index c8733a0b5..7704b016f 100644
--- a/nimbus/tracer.nim
+++ b/nimbus/tracer.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[strutils, json],
   ./common/common,
diff --git a/nimbus/utils/utils.nim b/nimbus/utils/utils.nim
index 3d8c80e14..bdc819df8 100644
--- a/nimbus/utils/utils.nim
+++ b/nimbus/utils/utils.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[math, times, strutils],
   eth/[rlp, common/eth_types_rlp],
diff --git a/premix/configuration.nim b/premix/configuration.nim
index 57b7fa91c..931aeb7e8 100644
--- a/premix/configuration.nim
+++ b/premix/configuration.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[os, parseopt, strutils],
   eth/common, stint, ../nimbus/config
diff --git a/premix/downloader.nim b/premix/downloader.nim
index 7a22f8190..b5a059c00 100644
--- a/premix/downloader.nim
+++ b/premix/downloader.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[json, strutils],
   json_rpc/[rpcclient], httputils,
diff --git a/premix/dumper.nim b/premix/dumper.nim
index 03327f622..4654e5ec6 100644
--- a/premix/dumper.nim
+++ b/premix/dumper.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 #
 # helper tool to dump debugging data for persisted block
 # usage: dumper [--datadir:your_path] --head:blockNumber
diff --git a/premix/graphql_downloader.nim b/premix/graphql_downloader.nim
index ec57db065..360e60344 100644
--- a/premix/graphql_downloader.nim
+++ b/premix/graphql_downloader.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2021-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/json,
   chronos, stew/results, eth/common,
diff --git a/premix/hunter.nim b/premix/hunter.nim
index bbdb98a12..2865906d7 100644
--- a/premix/hunter.nim
+++ b/premix/hunter.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[json, tables, hashes],
   eth/trie/trie_defs,
diff --git a/premix/js_tracer.nim b/premix/js_tracer.nim
index 1399eefb9..e2c5858e0 100644
--- a/premix/js_tracer.nim
+++ b/premix/js_tracer.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 const postStateTracer* = """{
   postState: {},
 
diff --git a/premix/parser.nim b/premix/parser.nim
index 1dc6b613d..d339cd6e0 100644
--- a/premix/parser.nim
+++ b/premix/parser.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   json, strutils, options, os,
   eth/common, httputils, nimcrypto/utils,
diff --git a/premix/persist.nim b/premix/persist.nim
index 34b9ab883..39e926011 100644
--- a/premix/persist.nim
+++ b/premix/persist.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 # use this module to quickly populate db with data from geth/parity
 
 import
diff --git a/premix/premix.nim b/premix/premix.nim
index 9954ddbcc..5e8fd07dc 100644
--- a/premix/premix.nim
+++ b/premix/premix.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[json, strutils, os],
   downloader, stint,
diff --git a/premix/premixcore.nim b/premix/premixcore.nim
index b5c51f7db..828224d3b 100644
--- a/premix/premixcore.nim
+++ b/premix/premixcore.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   json, strutils, os,
   stint, chronicles, eth/common,
diff --git a/premix/prestate.nim b/premix/prestate.nim
index 7a357f109..3a103533f 100644
--- a/premix/prestate.nim
+++ b/premix/prestate.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   json, stint, stew/byteutils,
   ../nimbus/db/[core_db, storage_types], eth/[rlp, common],
diff --git a/premix/regress.nim b/premix/regress.nim
index a33507e96..52b13f279 100644
--- a/premix/regress.nim
+++ b/premix/regress.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   chronicles,
   ../nimbus/[vm_state, vm_types],
diff --git a/scripts/check_copyright_year.sh b/scripts/check_copyright_year.sh
new file mode 100644
index 000000000..519bd028a
--- /dev/null
+++ b/scripts/check_copyright_year.sh
@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2023 Status Research & Development GmbH. Licensed under
+# either of:
+# - Apache License, version 2.0
+# - MIT license
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
+excluded_files="config.yaml"
+excluded_extensions="json|md|png|txt|toml|gz|key|rlp"
+
+current_year=$(date +"%Y")
+outdated_files=()
+while read -r file; do
+  if ! grep -qE 'Copyright \(c\) .*'$current_year' Status Research & Development GmbH' "$file"; then
+    outdated_files+=("$file")
+  fi
+done < <(git diff --name-only --diff-filter=AM --ignore-submodules HEAD^ HEAD | grep -vE '(\.('$excluded_extensions')|'$excluded_files')$' || true)
+
+if (( ${#outdated_files[@]} )); then
+  echo "The following files do not have an up-to-date copyright year:"
+  for file in "${outdated_files[@]}"; do
+    echo "- $file"
+  done
+  exit 2
+fi
diff --git a/scripts/print_version.nims b/scripts/print_version.nims
index ffebc925a..d9e2dfbd2 100644
--- a/scripts/print_version.nims
+++ b/scripts/print_version.nims
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2018-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import ../nimbus/version
 
 echo NimbusVersion
diff --git a/stateless/does-not-compile/json_from_tree.nim b/stateless/does-not-compile/json_from_tree.nim
index 14c290295..c8f58a477 100644
--- a/stateless/does-not-compile/json_from_tree.nim
+++ b/stateless/does-not-compile/json_from_tree.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   stew/[byteutils, endians2], json, strutils,
   eth/[common, rlp],
diff --git a/stateless/does-not-compile/json_witness_gen.nim b/stateless/does-not-compile/json_witness_gen.nim
index 3a97d0906..3b34239e1 100644
--- a/stateless/does-not-compile/json_witness_gen.nim
+++ b/stateless/does-not-compile/json_witness_gen.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   randutils, random, parseopt, strutils, os,
   eth/[common, rlp], eth/trie/[hexary, db, trie_defs],
diff --git a/stateless/multi_keys.nim b/stateless/multi_keys.nim
index 989e02944..4dbbe3edc 100644
--- a/stateless/multi_keys.nim
+++ b/stateless/multi_keys.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   eth/common, eth/trie/nibbles, algorithm,
   ./witness_types
diff --git a/stateless/randutils.nim b/stateless/randutils.nim
index 517439024..65ee92854 100644
--- a/stateless/randutils.nim
+++ b/stateless/randutils.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import random, sets, nimcrypto/sysrand
 
 type
diff --git a/stateless/stack_based_witness_builder.nim b/stateless/stack_based_witness_builder.nim
index de037943f..cf9fee1ad 100644
--- a/stateless/stack_based_witness_builder.nim
+++ b/stateless/stack_based_witness_builder.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 proc getBranchStack*(wb: WitnessBuilder; key: openArray[byte]): string =
   var
     node = wb.db.get(wb.root.data)
diff --git a/stateless/test_block_witness.nim b/stateless/test_block_witness.nim
index bc6957858..d7612e36d 100644
--- a/stateless/test_block_witness.nim
+++ b/stateless/test_block_witness.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   unittest2, os, json, strutils,
   eth/[common, rlp], eth/trie/trie_defs,
diff --git a/stateless/test_fuzz.nim b/stateless/test_fuzz.nim
index 4c04839d2..a674edac9 100644
--- a/stateless/test_fuzz.nim
+++ b/stateless/test_fuzz.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   testutils/fuzzing, ../../nimbus/db/core_db,
   ./tree_from_witness, ./witness_types
diff --git a/stateless/test_witness_json.nim b/stateless/test_witness_json.nim
index 4808c04ab..586fa3d66 100644
--- a/stateless/test_witness_json.nim
+++ b/stateless/test_witness_json.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   eth/common, json, os, unittest2,
   ../../nimbus/db/core_db,
diff --git a/stateless/test_witness_keys.nim b/stateless/test_witness_keys.nim
index 0358463e1..36a16c34a 100644
--- a/stateless/test_witness_keys.nim
+++ b/stateless/test_witness_keys.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   randutils, random, unittest2, stew/byteutils, os,
   eth/[common, rlp], eth/trie/[trie_defs, nibbles],
diff --git a/stateless/tree_from_witness.nim b/stateless/tree_from_witness.nim
index 145409ae9..2f72d829f 100644
--- a/stateless/tree_from_witness.nim
+++ b/stateless/tree_from_witness.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   typetraits,
   faststreams/inputs, eth/[common, rlp], stint,
diff --git a/stateless/witness_from_tree.nim b/stateless/witness_from_tree.nim
index e6cbdd7e5..6a7099690 100644
--- a/stateless/witness_from_tree.nim
+++ b/stateless/witness_from_tree.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 {.push raises: [].}
 
 import
diff --git a/stateless/witness_types.nim b/stateless/witness_types.nim
index 26fe26b47..76046f116 100644
--- a/stateless/witness_types.nim
+++ b/stateless/witness_types.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2020-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import stew/bitops2
 
 {.push raises: [].}
diff --git a/tests/db/test_kvstore_rocksdb.nim b/tests/db/test_kvstore_rocksdb.nim
index 21e9c7cd3..f80fb01ad 100644
--- a/tests/db/test_kvstore_rocksdb.nim
+++ b/tests/db/test_kvstore_rocksdb.nim
@@ -1,3 +1,14 @@
+# Nimbus
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
+
 {.used.}
 
 import
diff --git a/tests/macro_assembler.nim b/tests/macro_assembler.nim
index 96eab20fa..6906d30a8 100644
--- a/tests/macro_assembler.nim
+++ b/tests/macro_assembler.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[macrocache, strutils],
   eth/keys,
diff --git a/tests/nim.cfg b/tests/nim.cfg
index 4a0dfe881..e1aa9c227 100644
--- a/tests/nim.cfg
+++ b/tests/nim.cfg
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 -d:chronicles_line_numbers
 -d:"chronicles_sinks=textblocks"
 # comment this out, to run the tests in a serial manner:
diff --git a/tests/persistBlockTestGen.nim b/tests/persistBlockTestGen.nim
index 552a2853c..10c4b5cf1 100644
--- a/tests/persistBlockTestGen.nim
+++ b/tests/persistBlockTestGen.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   json, stint,
   ../nimbus/[tracer, config],
diff --git a/tests/rpcclient/eth_api.nim b/tests/rpcclient/eth_api.nim
index 576279bc9..0c9e27186 100644
--- a/tests/rpcclient/eth_api.nim
+++ b/tests/rpcclient/eth_api.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   strutils,
   json_serialization/std/[sets, net],
diff --git a/tests/test_config.nim b/tests/test_config.nim
index 68fbb7762..1051d4ff5 100644
--- a/tests/test_config.nim
+++ b/tests/test_config.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[parseopt, strutils, options]
 
diff --git a/tests/test_configuration.nim b/tests/test_configuration.nim
index 9bb1098c2..9717a372f 100644
--- a/tests/test_configuration.nim
+++ b/tests/test_configuration.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[os],
   pkg/[unittest2],
diff --git a/tests/test_difficulty.nim b/tests/test_difficulty.nim
index 90f8e927e..777264229 100644
--- a/tests/test_difficulty.nim
+++ b/tests/test_difficulty.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[strutils, tables, os, json],
   unittest2,
diff --git a/tests/test_forkid.nim b/tests/test_forkid.nim
index 1525e0e6d..06baafe32 100644
--- a/tests/test_forkid.nim
+++ b/tests/test_forkid.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   unittest2,
   ../nimbus/common/common,
diff --git a/tests/test_genesis.nim b/tests/test_genesis.nim
index 3bdaf91e6..edf3d652c 100644
--- a/tests/test_genesis.nim
+++ b/tests/test_genesis.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[os],
   unittest2,
diff --git a/tests/test_misc.nim b/tests/test_misc.nim
index eb1c9a21e..942f9c901 100644
--- a/tests/test_misc.nim
+++ b/tests/test_misc.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   unittest2,
   eth/common/eth_types,
diff --git a/tests/test_op_arith.nim b/tests/test_op_arith.nim
index c41031648..c858f1cd8 100644
--- a/tests/test_op_arith.nim
+++ b/tests/test_op_arith.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import macro_assembler, unittest2
 
 proc opArithMain*() =
diff --git a/tests/test_op_bit.nim b/tests/test_op_bit.nim
index 9738c1327..543008f17 100644
--- a/tests/test_op_bit.nim
+++ b/tests/test_op_bit.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import macro_assembler, unittest2
 
 proc opBitMain*() =
diff --git a/tests/test_op_custom.nim b/tests/test_op_custom.nim
index e80c73233..d20b3d051 100644
--- a/tests/test_op_custom.nim
+++ b/tests/test_op_custom.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   macro_assembler,
   unittest2,
diff --git a/tests/test_op_env.nim b/tests/test_op_env.nim
index bb8e6239b..8a8cd2917 100644
--- a/tests/test_op_env.nim
+++ b/tests/test_op_env.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   macro_assembler, unittest2,
   stew/byteutils, ../nimbus/common/common,
diff --git a/tests/test_op_memory.nim b/tests/test_op_memory.nim
index 390fa1e2a..3bc841c5b 100644
--- a/tests/test_op_memory.nim
+++ b/tests/test_op_memory.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[macros, strutils],
   macro_assembler, unittest2
diff --git a/tests/test_op_misc.nim b/tests/test_op_misc.nim
index 57a62cea8..0d81cde8a 100644
--- a/tests/test_op_misc.nim
+++ b/tests/test_op_misc.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   macro_assembler,
   unittest2,
diff --git a/tests/test_transaction_json.nim b/tests/test_transaction_json.nim
index aaa266d72..99fa93a26 100644
--- a/tests/test_transaction_json.nim
+++ b/tests/test_transaction_json.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[json, os, tables, strutils],
   unittest2,
diff --git a/tests/test_txpool.nim b/tests/test_txpool.nim
index 724c82505..e15a862c7 100644
--- a/tests/test_txpool.nim
+++ b/tests/test_txpool.nim
@@ -1,5 +1,5 @@
 # Nimbus
-# Copyright (c) 2018-2019 Status Research & Development GmbH
+# Copyright (c) 2018-2023 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
 #    http://www.apache.org/licenses/LICENSE-2.0)
diff --git a/tests/test_txpool2.nim b/tests/test_txpool2.nim
index 4a0a0b73c..3fea20d66 100644
--- a/tests/test_txpool2.nim
+++ b/tests/test_txpool2.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2022-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   std/[tables,  os],
   eth/[keys],
diff --git a/tests/test_wire_protocol.nim b/tests/test_wire_protocol.nim
index 05eea2b46..018c3ebf9 100644
--- a/tests/test_wire_protocol.nim
+++ b/tests/test_wire_protocol.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   eth/p2p, eth/p2p/rlpx,
   chronos, testutils/unittests,
diff --git a/tests/tracerTestGen.nim b/tests/tracerTestGen.nim
index 52db5abd1..f9879c1f0 100644
--- a/tests/tracerTestGen.nim
+++ b/tests/tracerTestGen.nim
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2019-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 import
   json,
   ../nimbus/common/common, # must be early (compilation annoyance)
diff --git a/tools/evmstate/config.nims b/tools/evmstate/config.nims
index e2a72237a..a4a048198 100644
--- a/tools/evmstate/config.nims
+++ b/tools/evmstate/config.nims
@@ -1 +1,11 @@
+# Nimbus
+# Copyright (c) 2022-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 switch("define", "chronicles_runtime_filtering=on")
diff --git a/tools/t8n/config.nims b/tools/t8n/config.nims
index f82c60fa4..2319ebd43 100644
--- a/tools/t8n/config.nims
+++ b/tools/t8n/config.nims
@@ -1,3 +1,13 @@
+# Nimbus
+# Copyright (c) 2022-2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+#    http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+#    http://opensource.org/licenses/MIT)
+# at your option. This file may not be copied, modified, or distributed except
+# according to those terms.
+
 if defined(evmc_enabled):
   # evmcLoadVMShowDetail log output will intefere with t8n ouput
   switch("define", "chronicles_enabled=off")