diff --git a/cookbook/introduction/22_Provenance_Tracking.ipynb b/cookbook/introduction/22_Provenance_Tracking.ipynb
index ce285f3d..7df9ab1d 100644
--- a/cookbook/introduction/22_Provenance_Tracking.ipynb
+++ b/cookbook/introduction/22_Provenance_Tracking.ipynb
@@ -129,7 +129,7 @@
     "\n",
     "print(\"\\n--- ordered chain ---\")\n",
     "for e in prov.trace_lineage(\"claim_biomass_increase\"):\n",
-    "    print(f\"{e.entity_id} | v{getattr(e, 'version', '?')} | {e.activity_id}\")"
+    "    print(f\"{e.entity_id} | seq#{e.sequence_id} | {e.activity_id}\")"
    ]
   },
   {
@@ -200,7 +200,9 @@
     "print(\"Checksum verified:\", ok)\n",
     "\n",
     "print(\"Computed:\", compute_checksum(entry_biomass)[:16], \"...\")\n",
-    "print(\"Stored:  \", entry_biomass.checksum[:16] if getattr(entry_biomass, 'checksum', None) else \"(see entry fields)\")"
+    "print(\"Stored:  \", entry_biomass.checksum[:16] if getattr(entry_biomass, 'checksum', None) else \"(see entry fields)\")\n",
+    "chain = prov.verify_chain()\n",
+    "print(\"Chain verification:\", json.dumps(chain, default=str)[:200])\n"
    ]
   },
   {