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 0x80895cf9f8ea9e8482307330a84d2f6aa783c60787a5ac6c5832444e0308f720. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd9bff49-a477-4664-a169-fecd0d17dda0.json and https://artists.proofprofile.net/proofs/artist/fd9bff49-a477-4664-a169-fecd0d17dda0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Incredible Hans Zimmer | The Dark Knight Session 2
The Incredible Hans Zimmer | Pirates Of The Caribbean Session 4
The Incredible Hans Zimmer Inception Session 6
The Incredible Hans Zimmer | The Lion King Session 5
Follow The White Rabbit | The Matrix Album | RESURRECTIONS Session
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 0x0cfda03ddba0d498590929a18f75041a43fdf08d982194ba44c2d24c1d3d9d31. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:32Z), 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/GX53U2496723.