{"ok":true,"verified_count":200,"rows_examined":200,"tip_seq":29648,"first_seq_checked":29449,"failed_at_seq":null,"error":null,"timestamp":"2026-05-31T21:25:44.790254+00:00","promise":"Verified the last 200 audit_log rows form an unbroken HMAC chain. Each row's previous_hmac matched the prior row's entry_hmac. Anyone can re-run this check at /api/v1/proof/verify-chain — no auth required."}