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 0x994b62ddc918fbbb3f06a901d8e7db9801f1137d1c8e991881755c04706b28c4. 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/637a6fe8-13b5-467d-b164-906bef82ebcb.json and https://artists.proofprofile.net/proofs/artist/637a6fe8-13b5-467d-b164-906bef82ebcb.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 0xa26d8d490144d1fbe254739aa09100df8bb77bd31d509bdc7322689d7c79ab20. Chain 2 (Bitcoin): anchored in block 957523 (2026-07-11T04:55:40Z), 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/INO132200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2544fe3864b8164ea3db56f13c34fb3b5577e0a89275bd53d80bf7ebc0bc5a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA062302500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2287cd3ef3a1713a4dd37372d36a029b7ecd633b75b318bd331dc6c12cc21e82. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:08Z), 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/INSD11947770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b536ad6ecbdce529214bd9e0942319357b1cc9aa01cc1138f239bf3bac23d23. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIZ2456687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6339f86f31cb09441fad8fcf5439bd19778cf3616fdd50a24a954822ed091bdd. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:03Z), 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/TCAJA2456533.