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 0x40f5932275792e3c1f2d7e557ac859f227ad1e6ce341233ad7e6261daaae4d99. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/033ddcb5-9703-4ec2-9fb8-0e97b3eb1b92.json and https://artists.proofprofile.net/proofs/artist/033ddcb5-9703-4ec2-9fb8-0e97b3eb1b92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).