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 0xdc395805bb18568e2c4f98ccde70cc9c3aed23b6951371ea0d1ab5ee6a94d0c8. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed65513d-5ae6-4f94-a312-634f5ea9c974.json and https://artists.proofprofile.net/proofs/artist/ed65513d-5ae6-4f94-a312-634f5ea9c974.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 0x35f0bec2aa88385760321c8eb63df531d3f927070626c68e3dc4c0f575190da6. 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/QZTB92507559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42f1e098153ecc3807dafdac96bbd75b83fe8e6ccb3d8816db349553de46b57. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB92507531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa227f8e39991aa14f59b12a1bd7cb04b35bda835138a22fc12660dfc3ca33d73. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:53:25Z), 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/QZWFL2537453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb550b9873174bba391a5f715032ef991645f6552a1707f7afd66e33ffed9c95a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWFL2591362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273bc6b51866d4e61190e7ad7de691a4ab593236d37cf93f5a122135602306b2. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:52Z), 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/QZWFL2591363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b362d1ee74fc9e5e20355da6c24c484365cacab325d0b17e0e25d35c967e00. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:58:01Z), 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/QT3F92568086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9671afa2707c6d72e25c61a1530a48117599ef0714980a423d4025f49ec679e. 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/QT3F92571126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5bfb7e58c127b4c0d978b145de6020110dfac180aabf2f2e92942b50d5cd15. 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/QT3F92574510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9607a75ed6a4d695d2d06749b5eaba02e8eedbc8e0f1ab92fffbde028a334a45. 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/QT3F92574316.