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 0x6c04c06bdf4977437f2a58ab0ac5d7a578d6e0cc9b6199a96e0e72ad5cf1c4dd. 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/4482da1c-c2f2-4de1-b61c-1f4b1d80b7b3.json and https://artists.proofprofile.net/proofs/artist/4482da1c-c2f2-4de1-b61c-1f4b1d80b7b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Change The World (The Voice Performance)
I Don’t Need No Doctor (The Voice Performance)
Will It Go Round In Circles (The Voice Performance)
Pickin’ Wildflowers (The Voice Performance)
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 0x6d86afff14a15e334cbeff41f8ab5a44e533275801495b0e84bd6dd0882b61b6. 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/QZFD41800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3f767fdc7c44ddab1812ed7b9be9649573767788737e61401f393979f047f4. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QM6N22365497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480e756d7ce7997dc51348883d2d21558900f2e9f37ab57f1121d34fb014b6b5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:11Z), 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/QMBZ92337752.