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 0x10c528886bb4974c7d54f1a3f230068eeed37ff80d48660ff6b7970db6575e73. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc9100b5-6c77-4b0d-a571-bb0f0f80f90e.json and https://artists.proofprofile.net/proofs/artist/bc9100b5-6c77-4b0d-a571-bb0f0f80f90e.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 0x0b7f0790a866fdc6dc92645df18b95335a55fe6c9adde30a968b355e0f1079a8. 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/USAT20505472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c9a0d880e58646b133c2227f6c0765c41a44d961dbc82c364585c805c51242. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USAT20502850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bee53fb4897aac1f36edde4e5424d0b2ddfdc9ef1995c3a93b07562789ca3fc. 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/USAT20505473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc094ce7a9dc9bfd3957718e9da61f73efeca95b738289fdf3d677ac94f9eeaec. 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/USAT20503424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c63b30947e2094de1eb67494b9e523a3579a83b90ca1b648a1aa4341bff057. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USAT20505479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96846de1178b6b233704154a8a9c44e9c0e639223d012409c41d8cc60607903. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAT20505481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2346c3de58b2fb696d40800c21f2a7db9d136e4ca27d9c68516ee3c734813b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAT20502089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6ec9ccb6be1b186d3f1b5e6c1b943b877d017b94dcb9adb39c693501665d04. 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/USAT20505471.
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 0xc60e1e83ad74fcde34d4f10ae2d0f5e80de8d39c6e6aa36b3ef10379a1320408. 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/USAT20505474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbf7bed374ffd277479df0235653500ef1a4f310958c6e58dd4de5c3ac1f250. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USAT20505475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed0c45504da074bba5426ed7ea30770ecd9c8d058150ffc06553951d9810ff1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USAT20505476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69061aa551a1239f7cad84cadd7845ba64ff1dccdb7b7957fd0a941611c4d2d6. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/USAT20505477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa800c2cb92c7b5d19dcbbeadaf739f1eaa820c8102d362d6402a42415e2be338. 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/USAT20505478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60adc925ff6f3a44ec1322b6d79da859d9f96974fc8598f40fb7f7b53a1d5170. 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/USAT20505480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0698299f81db64d7bf4e85af2bb3a4022878c8e28d86e7261dc752b5596c252e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USAT20505482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387a4b9ec5ad1aeae6ba2ac0e0d090d4c15463304b83a73244801ec14c8a8ef4. 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/USAT20505177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c50d399b2d56bda7a7fd4b7615e56162c632a6c8389ab0848f68934f3c98e. 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/USAT20505178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922af9d89f2c410b6084ba4b1fa8c9319060829ba7e640e3fbdcf9dd5bb02eff. 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/USAT20502851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1923c7e016404dfdd0b485463429cc17791019b69ac87a2c82489376fe4880d7. 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/USAT20505180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96768e50f4f004fd7b9818e462413b74ac60d052eed1c2b4e55938b0392d5e00. 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/USAT20505182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18212c1dfdf828cd4db8d2f5997a85e0a9722ef89e2c711bbab0d24fc1667441. 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/USAT20503426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a7d4ab2e063382d80a7df3eafe4f5b7e359b1ff851465d75f7fe9dc26763ff. 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/USAT20505183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca76b430c7933947e6fd6c251fe47fc2c817044283523c752c376a8b7b0e37d5. 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/USAT20505184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa149ac9ff49d925dd072a657f9d61b0fc490f9283ad67ea641b087229ad2a822. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAT20505185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013fe416d1f4aaee8013a0b7d0c60597c80fbcd0c5331c7708a8624039fe4bdf. 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/USAT20505186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250e5564767c45c5215c8c07a661e86fd2d72f2013a9a19df9c947627970371f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAT20505187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468568632a9ab4481d095f05e759da83c487e8d9a5c53455d8cc0bd458ad2180. 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/USAT20505188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da314f122c4765081f7a1fc85f927704134444b823d3d5d4db2d540fd2d983f. 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/USAT20505470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd943c8d12f3dcec4842515e6dac46e4788bc3d8b86ec5fc5e94a692f2f5a44a9. 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/USAT20502090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a69c0e460d5070c510fb82dad8c7a941f98afd013eec2eb96df0c3b159d38b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAT20505189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f629fc6818f866b390cfb382b52cab820975a549961b6d2b2bcda0b7836a70. 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/QZNB82417673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97195f82d9c183f01e3cb28688a80295ea284382722310ad85d71f0f312860e1. 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/QZNC62320101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0936f8548ee69e979ad6842669846b6886b334309b3878372d6e15b2e2fda3d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNC62320102.