diff --git a/scripts/run_leo_negative_permissions_canary.py b/scripts/run_leo_negative_permissions_canary.py
index f2f53f8..76403b3 100644
--- a/scripts/run_leo_negative_permissions_canary.py
+++ b/scripts/run_leo_negative_permissions_canary.py
@@ -29,6 +29,7 @@ APPLY_PREREQS_SQL = ROOT / "scripts" / "kb_apply_prereqs.sql"
 READ_ROLE_SQL = ROOT / "ops" / "observatory_read_role.sql"
 DATABASE = "teleo_canonical"
 IAM_USER = "sa-observatory-read-adapter@teleo-501523.iam"
+PARTICIPANT_HANDLE = "m3taversal"
 DEFAULT_IMAGE = "postgres:16-alpine"
 CANARY_LABEL = "leo-negative-permissions"
 
@@ -72,7 +73,7 @@ create table public.private_notes (
 );
 
 insert into public.agents (id, handle, kind)
-values ('11111111-1111-1111-1111-111111111111', 'm3ta', 'human');
+values ('11111111-1111-1111-1111-111111111111', '__PARTICIPANT_HANDLE__', 'human');
 
 create table kb_stage.kb_proposals (
   id uuid primary key,
@@ -280,6 +281,11 @@ def fingerprint(container: str) -> dict[str, Any]:
     query = f"""
 select jsonb_build_object(
   'database', current_database(),
+  'participant_handle', (
+    select handle
+      from public.agents
+     where id = '11111111-1111-1111-1111-111111111111'
+  ),
   'principal', (
     select jsonb_build_object(
       'rolname', rolname,
@@ -371,6 +377,7 @@ def operation_suite(container: str, password: str) -> list[dict[str, Any]]:
     fake_payload = "'{\"apply_payload\":{}}'::jsonb"
     proposal_id = "'55555555-5555-5555-5555-555555555555'::uuid"
     reviewer_id = "'11111111-1111-1111-1111-111111111111'::uuid"
+    reviewer_handle = sql_literal(PARTICIPANT_HANDLE)
     operations = [
         allowed_operation(
             "session_read_only_defaults",
@@ -477,7 +484,7 @@ def operation_suite(container: str, password: str) -> list[dict[str, Any]]:
                 password,
                 [
                     "select kb_stage.approve_strict_proposal("
-                    f"{proposal_id}, 'revise_strategy', {fake_payload}, 'm3ta', "
+                    f"{proposal_id}, 'revise_strategy', {fake_payload}, {reviewer_handle}, "
                     "'I approve this in chat')"
                 ],
             ),
@@ -491,7 +498,7 @@ def operation_suite(container: str, password: str) -> list[dict[str, Any]]:
                 password,
                 [
                     "select kb_stage.assert_approved_proposal("
-                    f"{proposal_id}, 'revise_strategy', {fake_payload}, 'm3ta', {reviewer_id}, "
+                    f"{proposal_id}, 'revise_strategy', {fake_payload}, {reviewer_handle}, {reviewer_id}, "
                     "now(), 'fake review')"
                 ],
             ),
@@ -505,7 +512,7 @@ def operation_suite(container: str, password: str) -> list[dict[str, Any]]:
                 password,
                 [
                     "select kb_stage.finish_approved_proposal("
-                    f"{proposal_id}, 'revise_strategy', {fake_payload}, 'm3ta', {reviewer_id}, "
+                    f"{proposal_id}, 'revise_strategy', {fake_payload}, {reviewer_handle}, {reviewer_id}, "
                     "now(), 'fake review', 'kb-apply')"
                 ],
             ),
@@ -606,6 +613,11 @@ def main() -> int:
             "production_contacted": False,
             "canonical_production_rows_contacted": False,
         },
+        "identity_policy": {
+            "participant_handle": PARTICIPANT_HANDLE,
+            "reviewer_handle": PARTICIPANT_HANDLE,
+            "exact_handle_required": True,
+        },
         "operations": [],
         "passed": False,
     }
@@ -680,7 +692,7 @@ def main() -> int:
         }:
             raise CanaryError(f"disposable container isolation mismatch: {isolation}")
 
-        admin_psql(container, BOOTSTRAP_SQL)
+        admin_psql(container, BOOTSTRAP_SQL.replace("__PARTICIPANT_HANDLE__", PARTICIPANT_HANDLE))
         admin_psql(container, APPLY_PREREQS_SQL.read_text(encoding="utf-8"))
         admin_psql(
             container,
diff --git a/tests/test_leo_negative_permissions_canary.py b/tests/test_leo_negative_permissions_canary.py
index 2fa9edc..8e5ebc7 100644
--- a/tests/test_leo_negative_permissions_canary.py
+++ b/tests/test_leo_negative_permissions_canary.py
@@ -28,6 +28,11 @@ def test_leo_negative_permissions_canary_runs_real_postgres_lifecycle(tmp_path:
     receipt = json.loads(output.read_text(encoding="utf-8"))
     assert receipt["passed"] is True
     assert receipt["current_tier"] == "T2_runtime"
+    assert receipt["identity_policy"] == {
+        "exact_handle_required": True,
+        "participant_handle": "m3taversal",
+        "reviewer_handle": "m3taversal",
+    }
     assert receipt["scope"] == {
         "canonical_production_rows_contacted": False,
         "container_network": "none",
@@ -65,6 +70,8 @@ def test_leo_negative_permissions_canary_runs_real_postgres_lifecycle(tmp_path:
         "claim_table_ownership_escalation",
     }
     assert all(operation["passed"] for operation in operations.values())
+    assert receipt["fingerprint"]["before"]["participant_handle"] == "m3taversal"
+    assert receipt["fingerprint"]["after"]["participant_handle"] == "m3taversal"
     assert receipt["fingerprint"]["unchanged"] is True
     assert receipt["fingerprint"]["before_sha256"] == receipt["fingerprint"]["after_sha256"]
     assert receipt["cleanup"]["passed"] is True