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 0x5ad964ab3c634b836562efd363d436457845fdd4a679392e496640a3d03764ff. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89ce5074-d156-42ba-856e-603cd1574585.json and https://artists.proofprofile.net/proofs/artist/89ce5074-d156-42ba-856e-603cd1574585.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 0x25f4d936c001c7943bfea359fd3f578744a75ac8cd60dcbc9d7ddbf0f9049a7d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USHM22011098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022d70d099bd397aa8ad9c56013ad3e83f8e099e509335eab0bc308fa2171ac5. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:27:30Z), 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/USHM22011100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b3ed219dfc8a13d89f6e60011282825d05cc99d1d354de1d3dea40f17e5a56. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:54:08Z), 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/USHM22011101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9757a596a4ed57d633000db22ecf7380963cd25c40b7205276a71635f668e4f5. 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/USHM22011104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccea0d67c53c2559a2d5671ae93737fc11bf836b2b703c3cdd259ce60d80da45. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:52:44Z), 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/USHM22011105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293e14d1a87c0dd2c5df63e9f736823e6ec0a808ffe375bcba77f9b7cada9dc8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM22011107.