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 0xa3d71367ffcb91bc12ec4aef7354e67ce8e8b53abb535827e7631e836098fa49. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fed8c3f1-26a8-4f30-b362-5962b4a3f6a3.json and https://artists.proofprofile.net/proofs/artist/fed8c3f1-26a8-4f30-b362-5962b4a3f6a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).