diff --git a/organ_measure.py b/organ_measure.py
index 84be518..621e7d0 100644
--- a/organ_measure.py
+++ b/organ_measure.py
@@ -338,3 +338,10 @@ def main():
 
 if __name__ == '__main__':
     main()
+# ╔══ SALKA ELMADANI AUTHORSHIP CERTIFICATE ══╗
+# © Salka Elmadani 2025-2026 — ALL RIGHTS RESERVED
+# Licensed under Business Source License 1.1 — https://inference-x.com
+# ─────────────────────────────────────────────────────────
+# SHA256: 0851280f9f83e9f30e35fd7efff164f806f506f94aa9cd983c8fdae7318a9864
+# SIG-ED25519: 7VtyjAri7KRdqUuc+WdkQkp50xKAkVRFqgqLHnJG0BkBltqVwJeYMScAkZ56b4mcsBWPhkj0Y8kS1fd2t/Y+BQ==
+# VERIFY: python3 verify_authorship.py organ_measure.py