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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76417de31738926e8de48ea73e523c9a4b0a6f7def67a7d9b73a85bdd4811f7. 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/b44e7622-85e7-4f32-9b0e-7853d7d79e52.json and https://artists.proofprofile.net/proofs/artist/b44e7622-85e7-4f32-9b0e-7853d7d79e52.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef83a0075b2fec04b74fc20801f9075a9ed1bb5b5dfed3296f66dfd3cb4c47ea. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QMFME1442111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43632b6fe1cbe76d2d933d5f8361bf85d056b1ff429b490f5fb4944064e7b13e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMFME1442116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1754d6124544f71c35adcbaa0d252b0db4dc5be76ac1911013345b68439fc35. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US6R21408666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc454c46c3aa7ae42918448d6d1c278ce86ee6f9b2108502f78de640139396ce5. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:19Z), 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/US6R21408667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ceba37ee4f83fd22162fb75aa301259828b5d8c38ca4353ceb00bfa868ab92. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:23:44Z), 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/US6R21420958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9d9c98dc7f41260e49205b4ca1875e53bbe5e5edfb79241971bc6a3ff4c638. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6N21471969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcfcb0538e6e916fbb83640336549e091ad68f8edeced0a89f2ad2c8cf96843. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:32:13Z), 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/QMBZ91732270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5076d1b38e4602567075e6a6c8e2eabf75dc554c2a2d445f6d672077861afbb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA61842164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ea8fe5e147774c4b8cf153a98612e13bd7a66f79b77a5d8db0215e769e15ca. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMDA61875115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d88b6cbae20d1f0379f25be91ef1ed2cfe92ee2658a185d5782e032ad40eb5. 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/QM4TW1846459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9fd696f9d83b236151f6a86f46cf6e653ae41a77ce96d87707f0c5fcdf478c. 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/QM6MZ1868834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08827c8d50ad4465660f87106d1437f2199a2d7005dc113f6f47f7e4521f9a1c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P41989861.