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 0xc0b462f0d76e7b1ea1cb69c30ccb90ff713b650c352a5e875e984e8550023df8. 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/f0b8b37c-0687-4ec5-9ed2-8803924fc32b.json and https://artists.proofprofile.net/proofs/artist/f0b8b37c-0687-4ec5-9ed2-8803924fc32b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).