diff --git a/docs/how-to/zot/enforce-tag-immutability.md b/docs/how-to/zot/enforce-tag-immutability.md
index 4d65d82..c6f27d2 100644
--- a/docs/how-to/zot/enforce-tag-immutability.md
+++ b/docs/how-to/zot/enforce-tag-immutability.md
@@ -1,6 +1,7 @@
 ---
 title: Enforce Tag Immutability
 modified: 2026-02-21
+last-reviewed: 2026-04-14
 tags:
   - how-to
   - zot
@@ -26,3 +27,4 @@ This approach requires authentication to be meaningful — without auth, everyon
 ## Related
 
 - [[harden-zot-registry]] — Parent goal (includes this requirement)
+- [[zot]] — Zot registry service reference