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 0x190b2713a9d3e5750c8a9e58adb90d37d13585373b67ac6447ae9e7915a18c5d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0201dbe2-c210-4a9e-97fd-2aa74a11f9e2.json and https://artists.proofprofile.net/proofs/artist/0201dbe2-c210-4a9e-97fd-2aa74a11f9e2.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 0x4d4f953eaabfb1cdd6b7e35b47b00b111e2512691f2ba7cd99608558e25b7d74. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE5W32200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2292bce169f663b4d368d46c8a945ad064978f5ea878d40975364f18f975e1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5W32200787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e2374a1ebfaed150eafd81c050ef6b110b54d529d05630057ebc3748fcaa0e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5W32204071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a440827ac59fe038708eafbd9a2c7e0eb8177e9e5996eb3b58416ec4b63ff53. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5W32400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485429d1724249a73737067e174d08b90d9f65dea530a1fcce16cd7477841e6b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5W32414992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb0471f282d210b4fe381853b2ca8004fdaa982365c440d3d4bd29a8878dc55. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/SE5W32309267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e93fe9c8be59b7f497ff3896830c733aea6cbe03c918556e60ce346148c5cdd. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE5W32468104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b80780684ed2de8a2f098ef2ffe05299a640110d8f2773ff48ce04f2fd50e5. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/SE5W32309207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52a99dfa2881e05ce1cdc7bc5ceaeda5c5022da9b237b6951f5ff5561db9135. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/SE5W32306773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3d2c8d3ded7d2490ee4baf22fbf6b95bd5f3e163a9cb66bb600b27acadbe75. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/SE5W32308475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271a3cc34f1872fd1ebb42d016eae68f3f6c1235bd38d6aa405398d3381fa193. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5W32305399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8c6ada7b237679c4696da24e001bef94e52c9dff82ae49fbe52c1bdf0c119d. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/SE5W32307895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7319a3f2a7de38bb99bdb231978445a2457f5419927b3453bdc254b52736af8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5W32308972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606008b436a3648b763af12586be1a40c2cad5454091f260ddee67c501321b3f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/SE5W32300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee5b25fd03c1a742aa1ff0af4284c1a9ce11778545871d634c96789aea1de4a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SE5W32306473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b533d877f27b1d9e7068194eb7bd29c36e94a93dd713d50816827ca0ad19c40. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE5W32308481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb643851d1fb79bd3ef95d75adaf20135b9b3d07516a154c210ddda651fa75. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5W32104037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f86d30ef2bfc86543a095611616d1080f7cf3caebbe363872f5bc686dbfde37. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5W32305687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23d0a6bab7871ba4ac5fa05b6ce0d1c2104245f7bd5774271447b1c5230ca54. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5W32104126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fba7ecb59cc0d126ab5f2f7a22116e7178ad1ea35ce28442d42cc6768a17149. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5W32203237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb9a60b30933cf8d258cbbd27a2343672e1f55493ec403e87f07cf956b28525. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5W32294027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c39c16bfdec381a4b7f48a3828df9f50026f6c8d58f30a922675d431307876a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/SE5W32200841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c28a037565a74c63bb5ee0e968771986a70699dae1b75e4cfdd84991f65e17. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5W32200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2292bce169f663b4d368d46c8a945ad064978f5ea878d40975364f18f975e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5W32200787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaea4ac31149a8fb7725620b16359a9803ccb9d5086654079ec1ef5f6a55699f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE5W32202366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d91347906c7311c2dbfa3e0997f1398d7d617aa4cd22c4c3661579a3b3de7d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5W32202282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7c6e1a10042ef2321d633449d7c746e569ff26563288ec4ebc2453596ba8f2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5W32200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc47b9285b69c51db13fb65a020b59d14781fdaee4b52bfe1527cee1c5791cd. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/SE5W32201923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a03b309905b5b4e76a43b3d930212055d5fd620c3b13845b0307fe0da91a9aa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5W32200000.