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 0xbdea49536ffd842b2e4ccabd1c1d34b4499a4b55769b75a7149150c5b61d50fa. 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/f624d91f-0c66-4a04-a98a-6eeb37c0df63.json and https://artists.proofprofile.net/proofs/artist/f624d91f-0c66-4a04-a98a-6eeb37c0df63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).