1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd14d13760fcc6130e47f84add4ad72a98a9115026e4801ce08e1629d4f56037. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e047526a-a94b-4bc6-a76a-81e741dcb855.json and https://artists.proofprofile.net/proofs/artist/e047526a-a94b-4bc6-a76a-81e741dcb855.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a39061d3a0da6c19063c585c171ec43ac8db9df666adee65b565e32fcea007c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2477908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d8de8442ac86362923c60a2f6c17d478bb24f826519acef151714b368c035f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2477909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339e592f61e4de4585200d7ecc91ee643ab65ef248bee0d8ed5021812e50a6e3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2477910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa93b15d62e8f4cb00de3a2ac823ce226e1f8f6944b609e0a022b5bc047812a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2477911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a42ca6e0f6b709894007c680812aa3f25ed0b3739980e089b6e9269217089f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2477922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14fb95ce9b6be5eeb0eeb5d4af04e763a71a9a292547f839309d7752a0830dd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2477923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f3af9d73fadc3445d374e121a7fbabb281412080bc51273855af28a502ce03. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2477928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f53c122d6a6238d4c8528c83046c158712a843d140a1f1159cc88d9637045d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2477932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bce7d708e37079b53efe228110125bc4863417142cf653b5d2256431c21669d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2477933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702e2b5568a4f1db7cde39b4e2bf0680dc0cc02d454f3442939078f9e41671e6. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2477937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a9464206916c2abe8d815216c30bd5bb516fe624159b79718ced4b8267b592. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDX62304950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27947b1a169842869dbdc11e32fa0401ff74dd51f7d3ba5065be42bba6db07b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDX62403580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752c4019a0505bc2b138e96698050e7f97e895ec8cb2cb0579d2caf933debd71. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2239881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa21af581980592d4533c58d5d7957c50bb33403eea92bc7ddc0a3abee785202. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2239882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218668200fb92c67e68b6676975d4c8fffb7a8a9b1ab7833cbe55df2eb1cbd39. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2492816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a440679d5b92b65fb7f513d8237f15553385856004000b1dd3683e478c8efa8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2354201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c6903aec697786d9c555dc233b248296fead869f7785d42f7e6967da97d6df. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30181ee7556d65407f8c082157cd69584fb7951a0bf02dd0460b97bbbd722d31. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad60ba21ac3d3f2b759e9bc11e1f1aa40eb8d4ff28bb2756ee4d3fe62e94669. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c31f90f199d1a5dfb9e5c6b33dc26b54817657f16d8f73791ecd62645bb86f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5466da012dda30f871819fb4e3ccaf56b7a3957ab94d7c152cdd630ea4222753. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3600dcb443c4fc03e79c86c1e8110cb71ec5ba1473aa2f7bd57ecdceed603b6. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9745c0b3c6e03c72cd76a38449e9fb754e284ed2bcf887656f10a962e6303d37. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744bdb479ad0c3c10006c51cf0001d80c417a4647a7e3ced1b604826c1970fa7. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a9622a55e3d7f81d1176e3e2bfbcbbdbcf5b71c5825eb568c26662ade5be90. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa6f78628a001c11a1b92a192a54abcf6aa3af49ac77ad76afb08080948a627. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4a5e5044c615d23430c154990d89ad074b65d13d5eab03aec3bfa0bb8a7833. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14cf7c0065ae537c8afc01754be3bfbadc5391b9447ae264c07bf873349138c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c106004c58034bf6b729a6f4c7de14b717ad604b4334e163e8ae18f282f726f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c80160a208c41fc7c2fbc898c741298cc58cb57cadb7d4d09b5ff0f05fd772. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18108282f3107c1afc83e488edf26316c4ca684ada0d0260c4886fc25b830d3c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59a29dc82785946677246c3871a6dc679d98a86219f2351df99838608e5b854. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571bae8928d1323511d8926f65b4e12f428f6165f6ee9549b2daae71f310c66f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2402157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d87a15924328ddba993712d4db0e0d3f12e8c12096aa6bae7bb41a08bab483e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDX62305580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfa46b22537ca6780fa558aeb4bb7c2d08902aa64cbc793135bb27f42470a5d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDX62305590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c88210bde16bef280e0968818f92d7800733350041c2772550afafe7020f64a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDX62305620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0097a5ab511e84231b76ed128d14bc37e639fe815b8bf752c3d2cad18c35f83. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM42K2281234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838b6e9fff7ee279463b2de60af1d02f0bee3ff08c1c17c42d11aadd6d5ac846. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS642279771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120dc6f42d87d95b4f4321372a2ef57544a69936853aeae418459aa992d733ca. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS662267623.