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 0xd17f7c286b17602dffc8aa57d8a7a3f0fabc1d61a798559d45d7f260857ac3bb. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13b55fa2-59e7-49cf-bc20-1c7f97a8873d.json and https://artists.proofprofile.net/proofs/artist/13b55fa2-59e7-49cf-bc20-1c7f97a8873d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).