In-browser simulation: this page runs entirely in your browser with sample data. It illustrates the WitnessOS governed-action flow (policy evaluation, hash-chained events, signed receipts). No real action is executed here. The real proof, recorded 5 Sep 2026 with an externally anchored E4 receipt (RFC 3161 TSA, revocation-verified at issuance), independently re-verified offline from the export bundle: VERDICT PASS, grade E4 (Anchored).