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 0x84e8d81da8e96427c6d0891ef744c500865cdf2f248134633f7c7f97f7e92aaf. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f788a0b8-3798-4ba7-a822-d8fd3e57a7cc.json and https://artists.proofprofile.net/proofs/artist/f788a0b8-3798-4ba7-a822-d8fd3e57a7cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).