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 0x62a78ff328d59a4c05681db69943c03896b62e0cfaa96ce01f32ee000a9f3d7c. 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/59fb22c8-d553-4510-8f50-ab2612b827a4.json and https://artists.proofprofile.net/proofs/artist/59fb22c8-d553-4510-8f50-ab2612b827a4.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 0x46993972cd6ce0e765ee138de2378424c8e8e681ba63da225e7629352061479b. 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/UKRNU2100858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89338bcae7aae7f298348823ef34a5d0dfc4a3fe75d0e57860012a732b9c456e. 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/UKRNU2100859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7058d062c316181093c90c0fff3c5fb44ebbd334553c9f31819021f611f221. 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/UKRNU2100860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e32bdff53d3027563ce132dd755796cfc5d44a73861e48dbcabffb75b6e6d91. 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/UKRNU2100861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0623f310f7ee0d237f5ef435ca70b1c9bee3e1d156da1cfc33de2f19e99553dd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:39:40Z), 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/UKRNU2100862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f91308cb872df793313bd868338ea3c068c97d8c0a32a0cc207886712216a9d. 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/UKRNU2100863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869a6c3b61e837349a431924356ddb854954cbd3816771e1837c37a2e76c692b. 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/UKRNU2100864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2391b647e6df1620e138932bb990883219cae595ba3235fb295aed96d8397d3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/UKRNU2100865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abf0947c500c3cffdfb576f2ee195dc64801c84e661ab7c3ed5d44679ca521c. 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/UKRNU2100866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddee02eb9f9e987f861178dc7f08e90b4ef6fa7e39fd8fdef622316d6439b762. 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/AUTZK2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd50859f299629e61666b1d27280ff29718543ae64d002f4c5153a1455ac833. 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/AUTZK1900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2b3bf9f95c27b80a18e9a558de9700a26090b9d0076b631a7851c83092042e. 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/AUTZK2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be8d70ce3c258e16338ba75426afd49ae6e1d0ad5ef2789a4422c0913ccf1ce. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AUTZK2000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d255244a5ca48999679255869691bd0d2fa8919e1a91faf4d52d0f181d17872. 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/AUTZK2000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab73b211e4108cc722aa3f1198f89cdb3502942a5c25514c7c6b346b988dc26d. 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/AUTZK1700127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd223b20982136bf7a1e9dc9c8c2f2fe94ce6984c58e89565664eaecb366392db. 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/AUTZK1700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8512310108561459dd3abb91332297b29cd6c4613fdf3f091de20d9479b78b. 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/AUTZK1700129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc485ff4d9d98ad8ddb3ee56076f6d6434f6c2260d05646408e7f1bfdf7ac25a9. 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/AUTZK1700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e547a9192c61017609ebc96294e16aeac1f9e280343b5fef7427611782b6bc. 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/AUTZK1700131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c710e02446729659c5a983e1759fa0f76fc4779221f1fd1f31ab8998147f9c3. 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/AUTZK1700132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77459b4b1fda4df1924ee4dffe23b5a0a463bb43a176c1f02f3689dd8198472. 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/AUTZK1700133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2495aae60d1b30d3475c5aac2c1185bf0729c3b3729a6e33250dc1e3be8bfbc1. 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/AUTZK1700134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f513cd0dc3977f5a712cecce7667575075d8378fcf74729c701f7f3bf7254c. 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/AUTZK1700135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391a3f696d280f2d1e94671b4254a1d216a9806b8cf7300f54c19247ff6148f4. 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/AUTZK1700136.