diff --git a/.env b/.env
index 251251be8..7d675b607 100644
--- a/.env
+++ b/.env
@@ -1,3 +1,17 @@
+## ===----------------------------------------------------------------------===
+## 
+## This source file is part of the DiscogsService open source project
+## 
+## Copyright (c) 2025 Röck+Cöde VoF. and the DiscogsService project authors
+## Licensed under Apache license v2.0
+## 
+## See LICENSE for license information
+## See CONTRIBUTORS for the list of DiscogsService project authors
+##
+## SPDX-License-Identifier: Apache-2.0
+## 
+## ===----------------------------------------------------------------------===
+
 # --- DOCUMENTATION ---
 
 DOCC_ARCHIVE_OUTPUT=./${SPM_LIBRARY_TARGET}.doccarchive
diff --git a/.gitignore b/.gitignore
index 8fbf40e5f..fac8b4a6f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,17 @@
+## ===----------------------------------------------------------------------===
+## 
+## This source file is part of the DiscogsService open source project
+## 
+## Copyright (c) 2025 Röck+Cöde VoF. and the DiscogsService project authors
+## Licensed under Apache license v2.0
+## 
+## See LICENSE for license information
+## See CONTRIBUTORS for the list of DiscogsService project authors
+##
+## SPDX-License-Identifier: Apache-2.0
+## 
+## ===----------------------------------------------------------------------===
+
 # Mac OS
 .DS_Store
 .netrc
diff --git a/Makefile b/Makefile
index 3891ab7a3..f8bd6d08f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,17 @@
+## ===----------------------------------------------------------------------===
+## 
+## This source file is part of the DiscogsService open source project
+## 
+## Copyright (c) 2025 Röck+Cöde VoF. and the DiscogsService project authors
+## Licensed under Apache license v2.0
+## 
+## See LICENSE for license information
+## See CONTRIBUTORS for the list of DiscogsService project authors
+##
+## SPDX-License-Identifier: Apache-2.0
+## 
+## ===----------------------------------------------------------------------===
+
 # ENVIRONMENT VARIABLES
 
 environment ?= .env
diff --git a/Package.swift b/Package.swift
index f959ad003..38da85187 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,5 +1,19 @@
 // swift-tools-version: 5.10
 
+// ===----------------------------------------------------------------------===
+// 
+// This source file is part of the DiscogsService open source project
+// 
+// Copyright (c) 2025 Röck+Cöde VoF. and the DiscogsService project authors
+// Licensed under Apache license v2.0
+// 
+// See LICENSE for license information
+// See CONTRIBUTORS for the list of DiscogsService project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+// 
+// ===----------------------------------------------------------------------===
+
 import PackageDescription
 
 let package = Package(