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Agents MUST treat UNKNOWN as CLOSED.","synthetic_time":null,"receipt":{"receipt_id":"83753d3d-2496-415f-9b37-d251ddf6c792","issued_at":"2026-08-05T08:02:17.734Z","expires_at":"2026-08-05T08:03:17.734Z","issuer":"headlessoracle.com","receipt_mode":"live","schema_version":"v5.0","public_key_id":"key_2026_v1","mic":"XNYS","status":"UNKNOWN","source":"SYSTEM","halt_detection":"active","signature":"12b1f59ab8400301e2a1a398b0996c90c11bd450b7a0a798cce3b0003ed45a998a373e6131bfb39cbf0b7899d37ab0949a431ea0fa7b370cbc47c51774e7970b"},"canonical_payload":"eyJleHBpcmVzX2F0IjoiMjAyNi0wOC0wNVQwODowMzoxNy43MzRaIiwiaGFsdF9kZXRlY3Rpb24iOiJhY3RpdmUiLCJpc3N1ZWRfYXQiOiIyMDI2LTA4LTA1VDA4OjAyOjE3LjczNFoiLCJpc3N1ZXIiOiJoZWFkbGVzc29yYWNsZS5jb20iLCJtaWMiOiJYTllTIiwicHVibGljX2tleV9pZCI6ImtleV8yMDI2X3YxIiwicmVjZWlwdF9pZCI6IjgzNzUzZDNkLTI0OTYtNDE1Zi05YjM3LWQyNTFkZGY2Yzc5MiIsInJlY2VpcHRfbW9kZSI6ImxpdmUiLCJzY2hlbWFfdmVyc2lvbiI6InY1LjAiLCJzb3VyY2UiOiJTWVNURU0iLCJzdGF0dXMiOiJVTktOT1dOIn0=","public_key":"03dc27993a2c90856cdeb45e228ac065f18f69f0933c917b2336c1e75712f178","algorithm":"ed25519"},{"vector_id":"v1_health","description":"HEALTH OK — same schema as /v5/health. 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