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 0x3e1a539373250eb58ca5fa355107d3d0a31c872f5e8faa252ebbfab9fd6c8ae4. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cbed6e4-cdc6-4b72-aa2d-4dfb77a7af36.json and https://artists.proofprofile.net/proofs/artist/2cbed6e4-cdc6-4b72-aa2d-4dfb77a7af36.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).