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 0xf67d173cac83c665cb4a459ab24f786cc560866fad05aacf3924c688234d1323. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0f93899-a97b-4d7d-925c-663eef9d6d41.json and https://artists.proofprofile.net/proofs/artist/d0f93899-a97b-4d7d-925c-663eef9d6d41.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 0xc65296d2b0425b2366a9dcce50c7e4dfa7d3a2f6bd1cfde534dce565104e6aeb. 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/QZFZ72560297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302b59e079aa76ded42bff6429169c10b565c7dc6a9af85aba9879ef9bc286a5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:27Z), 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/QZFZ72562840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fe5c0cafdaa261abfaa5e94df078ac89a6d4d3400c7c246a919f65e7d8db1c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:57:33Z), 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/QZFZ72562877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9da5f54be27b058996acf6d2b1f6f8591af359845e0fbd50aa9fb9131732be. 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/QZFZ72562869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6e71cedc4154d2c90e9fe8e13f3ca5011ffaa01c10627bb484d10e0044eda4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:57Z), 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/QZWFF2562191.