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 0xef06ab5cc80efbf882452644a1e7dea4b6c89b054563141903c3e67e3463f6a9. 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/c986a142-d342-4254-b7f4-9cc8cc0c52c3.json and https://artists.proofprofile.net/proofs/artist/c986a142-d342-4254-b7f4-9cc8cc0c52c3.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 0x493f9cabcbde9844f321bbb59c6db7186234c36b2f9c473d715332d63feb2615. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR96X1643933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0deeaff6fb71d93f88f88211949e8e57c2a54656107e8d98758ccb3420780cb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR96X1643938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10d1e82cacf2a4c3cca314c227a897fd0aac40dc030f03a9b4e69439985e449. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FR96X1643939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964f3deb40c02fdc783b0b0262a3f49c4ceecf1e2cde1f2297b788359b5ac540. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR96X1643940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1e68df3d4a90395b6574fc016fb79f5c830db3fefaab9cce9383d35bc69315. 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/FR96X1643941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c429cb38c9456271bba247e2d22ac4a3931c0bb33a888ecf7291269d7d8eb7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR96X1643946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7572f3e72d6dd3536befdf3b646aef098842c6bc6116752231b4ccde18092a13. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR96X1650994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc074ceb65227853f6a9a01b7785991922a613b5e82a518061ee702d6d53331. 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/FR96X1650996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6e89a2ea96fd2706494e3bbcc3e94c46a281a50d9b6190efdca4760ea8485a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR96X1650999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a273a46b62564565fb197b81293eab078e5c95c49d7cbc97912ab7f285ce2a9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR96X1651005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ae36f0c4179519d75d41cfe893a08b18e9d1a8520c3be62a4a6bd14971c2f6. 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/FR96X1651009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3554171effee2c967a06654b01ee33d348b3c6ca9b5857b20f2749ca001d64c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR96X1651010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642fca0c9dce8d07ed701af81362e423d3d9e779dd7df3bc57686d5dec44589b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX53U2323824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03eea98e558a056adf4ab01d597cfaed5a48ce628dadea0a09df34abeac33ae. 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/GBMA22496580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101b2899d770cac60a7c8d3e5646ba669bb1850dcac56a6f202964316c6e03a3. 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/ARQIW2405380.