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 0x91e29c9a06c0525fadcd966aaf0045da0fce04f8f75888ef84e55413e15c11bd. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acfd4f3f-0ea6-4ed0-b0f0-f22dac6b1ddf.json and https://artists.proofprofile.net/proofs/artist/acfd4f3f-0ea6-4ed0-b0f0-f22dac6b1ddf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).