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 0x5c1d48a656ad94bbfe1cf80888bcc9c88d2e8e95a3d06afb66fc78b7743b8838. 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/b00e9888-ac2c-444a-a6ea-12f903db2334.json and https://artists.proofprofile.net/proofs/artist/b00e9888-ac2c-444a-a6ea-12f903db2334.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 0x6821b76cbc63ad50bfd19fbc24bf7d1ab95574892491309d59a0903ae69bda35. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHZ52083698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd69224a5d3a0d7ae2c11afaa316ad3e8bd4e301afcdb834716bbcf6cc25656. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QMFME2250960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99723f966c1d2d64d2839142f5aed74a345519070386fcb661e464e6ff0c277c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME2250961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee63bbbfe5bbfe41018bed3d3f51237ae28c8be253d1b91caaacbecb6fcd6a2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME2250962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2223a510e8723cc85defc42b207ebf4340db234ec47b0bc6fa956f33b5c88. 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/QMFME2250964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41961336d829745dcb8ec861f54f90d43611a396d6a3af9782963da2aeadf5d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME2250965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d893d26407546c6f9f394c5b4d7a6bd3797bd0510dfe9efb74c03a6d9010ba8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:31:43Z), 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/QMFME2250963.
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 0x5d6a71041f6608f95c3118a5480c212c2f9e889cc1cc62b8fbfb6e7a14634a7c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMFME2250966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70bf0297446292625c6252de8a9d2f9aa8c358cedb6d67d93f86bc50f10e9d7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMFME2250967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda846ae1a5ef928fc644f6b141c9531d91a0a763dcbfe5bd5bb25688d080cba. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFME2250968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c49b12f471a884a091d8884084505bb3d2a2e6c4ae7143424d28b5a4c1437b. 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/QM4TX2253747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ac7fb8e3c0ee0cb5ab3bdae4e0345d2cebcd1470f43a014e14c2defb6050fe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:28:37Z), 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/QM4TX2253751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb64f2869c43f1fc16e98199da4cb9255aebcbb3dfebf3c324b11e623005c304. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QM4TX2253744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80aa768c5c738ccd1bfe218ae153be6961296e6f50801e0b9ac3fd9557c342c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TX2253745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25047c3518a0f3db73a0550cba0086de1af351415b0ed2b20c27e8d2148a1da8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM4TX2253746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d51a273f393792c138013c17017c264bc2103a41c59a3f2753a1350c99f77e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX2253748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1f07af4437e1d325eed460b75cd2ef07667f719d4cbffeb17c5ae9be1933c7. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QM4TX2253749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4f4e981849e828aa5259e1d7a80c4b0608447665ddf63cc28e88381087ddd8. 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/QM4TX2253750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92488fe0d8dc6bcbbbeb5242cf8bbc8b2f08fa089b5826e047fe6581622c6c93. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QM4TX2253752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6f02dba2749a9e6a2bfae8c3c2586388da67446f3a733ffab1d25a997122f8. 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/QM4TX2253753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e967f35cc2df06134cbf8c3e4df801772936b60e1e76a30a72437fffbbe45c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMG2312239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d946b99a5f438956a6c0878525dcd2db77b07cee07bb03fd3e940d6ca7067. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA62274180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba19c568183d56e186cfc844003bb3a2da396b9699ac6cc3f7e298e502cf24c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMDA62223663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5029999360a416af50d5a26c63e8d63c398e823dff92337b7f2893bda0eea8f9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMBZ92266735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7b037fd247a2b500f950ae4d48e6f41ca010cb54885c037b7936112619447e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TX2219090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3f411fd336a174fe2d8773893d687add2c32598300c5a221ae7d8299e98dd5. 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/QM4TX2253692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cb1cea404097b9c06610953f98854e2b03519b7f258c752b5d160f3f1a28e6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TX2253669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4577a35300470471948a8c67a219f7c4a86f962374025d4b61c89a2325598b89. 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/QM4TX2253616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73682bb783a987bd87b2de1052bed892dcb0c403e7c9823a148c7c1e78fc5b22. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2253648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffbb5743e80d62a38266eaee20d8b83067925c3edbca0559259a5c5df1c1255. 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/QM4TX2253562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01add91a3083f7ed67f3d578e1fca0c7ff47eb89e840ed512f8440b7491365cc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2253638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f09774e3cfbf7171e3e34f14cdae8203ec97a1f42e5ac4bdd182759b2ce04f. 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/USLZJ2534557.