1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d82c87c383e43e620cbfbc01b191401635986ff746b3cca1c2c6b0b8c24693. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cba55671-5f71-49c3-8ac7-9ed00634d93e.json and https://artists.proofprofile.net/proofs/artist/cba55671-5f71-49c3-8ac7-9ed00634d93e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bridges: The Best of the Private Music Recordings