diff --git a/schemas/artifactdeleted.json b/schemas/artifactdeleted.json
index 926333bf..eaec1eb0 100644
--- a/schemas/artifactdeleted.json
+++ b/schemas/artifactdeleted.json
@@ -27,6 +27,13 @@
         "timestamp": {
           "type": "string",
           "format": "date-time"
+        },
+        "chain_id": {
+          "type": "string",
+          "minLength": 1
+        },
+        "links": {
+          "$ref": "links/embeddedlinksarray.json"
         }
       },
       "additionalProperties": false,
@@ -98,4 +105,4 @@
     "context",
     "subject"
   ]
-}
\ No newline at end of file
+}
diff --git a/schemas/artifactdownloaded.json b/schemas/artifactdownloaded.json
index b0d97a6f..6f4c48f3 100644
--- a/schemas/artifactdownloaded.json
+++ b/schemas/artifactdownloaded.json
@@ -27,6 +27,13 @@
         "timestamp": {
           "type": "string",
           "format": "date-time"
+        },
+        "chain_id": {
+          "type": "string",
+          "minLength": 1
+        },
+        "links": {
+          "$ref": "links/embeddedlinksarray.json"
         }
       },
       "additionalProperties": false,
@@ -98,4 +105,4 @@
     "context",
     "subject"
   ]
-}
\ No newline at end of file
+}