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 0x08a36f29a19ca14e64cd206917b3f51b1174f2fd028e801656f46b94c33bc987. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5520f76-945a-46fa-a04a-b3da1fc2b73f.json and https://artists.proofprofile.net/proofs/artist/d5520f76-945a-46fa-a04a-b3da1fc2b73f.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 0xef108431a5b0419a2c39cc8b04b4e894120ef3b8afd334bafa600b938c030b69. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZFZ62010371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc703528963dd1bfe0c38f1fd45497a3235875c1e23c8144d1695fc4b962f66c6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6J2034313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc9bfaddaa197ba38c7b3af95832c1fc54c97710c973164c9ba43dc002f2e80. 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/QZFYY2211719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd240b2d52708cf8bf64904dafce6c3884207f923b763013c1dd4e51b7931ccb2. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZFYY2211726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa041363ae82f1a8cde25ebce1ea353baf48e69da388182d14b4b72264f6e8f42. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZES72327399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e01eb5a4e53765a7b9e2dca415c7a4859b7fbc13164466ed9161d39f5fa2ed. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWU2208923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617c241e5a749240603e9d47c3bb297499db65f0a9fe7af43fe7b4c3289e3934. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:16:38Z), 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/QZDA72597239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617c241e5a749240603e9d47c3bb297499db65f0a9fe7af43fe7b4c3289e3934. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZDA72597239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764a21f02a146e719e442412d5985ca5c508b26c751034bf0f003c2f3b8f532f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN82553313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285ed191f45fe82fa9360972b6f391ac440e5ff7582187c5ac5b7cbdc6ce6015. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHN82553315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d1240efba337b701c7cffd6bca022368efcd73bf8a8c8c9f7905b6a114d36e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN82553316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969b8213d82221ac2d6e09a23ff172c31319aa6e55aed35fa38d5bcf3621ac95. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN82553317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53272585f865805aee2d1df680f03db719a5a3632ccdd02342981c5dc5b9675. 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/QZHN82553318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0356a78aa655a4963a18cf5831acf2944ffeaa21cf305621207d0c71ad004dc6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN82553319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc559cb422167203e30e0968556a02dfcf33ed7ee9dd4264a85e1fca75221c6b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB92534901.