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 0x7c4fa4140823d24d703fe1bed27fc8465950490301e8b97e706236633dea3091. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40442ca8-7a34-4fab-b9d1-5935321afa6b.json and https://artists.proofprofile.net/proofs/artist/40442ca8-7a34-4fab-b9d1-5935321afa6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Royal Philharmonic Orchestra Play Classics from the Stage and Screen
The Royal Philharmonic Orchestra Plays the Shows, Vol. 1
The Royal Philharmonic Orchestra Plays The Rolling Stones
The Royal Philharmonic Orchestra Plays the Music of Simon and Garfunkel
The Definitive Collection of George Gershwin
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 0x547aee7a488c275573bf0628bd003956d63e467f530c56a0f65940c2ddd9dac4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBYJV0805836.
George Gershwin: The Definitive Collection, Vol. 4
Sorry Kids, The Moon Isn't Made Of Cheese