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 0xb1c8d6461522e944e544f9233439256bc5ed5b221968cea9e53aa0ab270ab9ca. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fa9cd45-1b64-4d34-87d6-2ef620e5c1a3.json and https://artists.proofprofile.net/proofs/artist/3fa9cd45-1b64-4d34-87d6-2ef620e5c1a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).