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 0xc6e9bf0c393b42aa98b579a0d3deb1288c14a53fcfa1e374002fa51ae8002d88. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36119cbe-21b9-4d30-9261-d78f2a4dc4c7.json and https://artists.proofprofile.net/proofs/artist/36119cbe-21b9-4d30-9261-d78f2a4dc4c7.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 0x71ecd5af2905fa7eedf8ce789bcf816695d448b90c33289fc6cd73cc3fb48cfd. 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/CAADD1610007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4322b6a4ee4d267e91b41854bea87b759e7f1bb7b650e85e12e3f8923b474f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CAD431908001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5f97eecab4fa55ce7ebf8d3e75e507a350eb39dd24208715879b3f94e145be. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:06Z), 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/CAD431908004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea221cd69a0a28ca33a3dfacafa172d54b5ad3b71ed94ac81f45fb676c61dac. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:52:56Z), 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/CAD431908005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb315a4a495dd7bbea6ed76fc9e26b6712ce4161676589e915233f1b3886dcd7f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAADD2337003.