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 0xff425a852ef39b8f1c5487b6bfb3470f0dd3c92811a2568149374ef50d7e9f47. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79533c02-0c9f-4ed1-a1ad-63955ac24817.json and https://artists.proofprofile.net/proofs/artist/79533c02-0c9f-4ed1-a1ad-63955ac24817.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).