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 0x21b1000249184dd65453d281287be9841b60149513a82d4ba8c2aaa794d6da3c. 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/17aa9fd6-a189-4c5d-a764-9d8fa5995671.json and https://artists.proofprofile.net/proofs/artist/17aa9fd6-a189-4c5d-a764-9d8fa5995671.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 0x897d45180ae0740bb88e49207756456d2d12edb22fb97a8e83ca2fc24189ecb7. 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/QM6P41978438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e32143486d8fd084586979dd6580f58cacb5c2968147708b2a414ca82b3b4b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6N22146392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d995a1c7b93d7cb36da540ad4fc5bed40ac0a2571b2a33fd9681e2f8007e50. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/GX3HH2178178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de499cacd5bdac28b03e8ee721ca7bbc4c396e05adb2ce3ab8648367d5fae05. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:14:26Z), 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/QMDA72194234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73df36b57a210c558c2b02e2404fa6bb9c42d982e6e355d5b2b02e216ac33e54. 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/USA2P2222806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470d6c5f131edda0dbf3a2ec5f3c4b11e8c4d7ea490759f0a3d591b6a8d78912. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USA2P2222805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470d6c5f131edda0dbf3a2ec5f3c4b11e8c4d7ea490759f0a3d591b6a8d78912. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:47:25Z), 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/USA2P2222805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039712007fe6f341cb36bd4501dcd200460e0d6fa6835a9632bb6397791bfce6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NL1ZN2302125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c45dc1daeae32305e76db871d12a31f68b4e87686fc664320c464a0b47fd23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BE8LH2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d515cf18e10c78efa8432417130cdc853cc13f7dcfe7a921990b6caf572bec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BE8LH2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea288ce6ccf790a629f15cd4aaf58c53308a8026e2303b632951b1cdaf6f0e64. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BE8LH2400267.