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 0x9454fb9d0efcd0d7f3c29e6caf268c99b44cec6972531c0d1cb89f05b2778ef7. 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/29934d82-4773-4ed2-b097-47e3da315741.json and https://artists.proofprofile.net/proofs/artist/29934d82-4773-4ed2-b097-47e3da315741.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 0x19f0a2bba5b01b3bac8d5e0e59c1c20454c55d74ebf67fff44a447cfe977f9a8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ4UU2301021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f486026519a132de53b8d5eb3929d6cd4f5c9f2c3f94b9f583fdf1a6ee7122. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZ4UU2301022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f36814bc6291e28a997284fc5431bc861e0d82fd6dfdd7d1ef43f6f6e9bdfa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZ4UU2301018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f5bafbc7a9550eba502737e8707b08a19d98c29fe5c65c3ae3388819178579. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ4UU2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1b3055240de9339fafdbf47e30493c79f6f8761f102b2560f0f8000381dffc. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GX8KD2327697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece339695b468e7d08750871bc16fb98dd436c0b6613bb7c6fe78fb4644dad4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZ4UU2301019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ef633c7dd43973cff5d763701c632c4fcb7553a8fb2f63a3a065c10f82677c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ4UU2301024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0822fb54ce1e316910b6a9e0094ac3b93ae43f41ed977742bf50ac75505fecba. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZ4UU2300418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f30ce981868d7a2e0a568eeb0d2c6da58a6c1756fddcc101c99376d5aaec08. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ4UU2401665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff2d7586f651aa418b2ad07676f82e2328c3606c04526ae32693fcdace702d8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ4UU2402351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97efa531aeba28ed04af057f9ebf751ab22e2401b57543f641b57879147a594. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZ4UU2500591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2835b03ce60d9d514f2188376912f251d1a6e3ad89862e6e370cc85be404c82e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZ4UU2500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa321daf37e41581f04b31f8aa5caa0121fc035cee36def2160741a3b78e4db9. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZ4UU2500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68141934093b8ad742359e53092e833f40681d2b8a51af6d8aa3ed5b20579582. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZ4UU2500595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43610ee2fcea59fad28ce2a45681bf2d8c24a9bce0c6c6688944cb9ce40c652d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ4UU2501639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8563d94953ca58a58c6e3bf99fa74dc4c8fd361554cb43d1e4ce79fe67238ccd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ4UU2501640.