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 0xdf1b9ca0c772725961faa12834d981bf4471dfc55a0204c01a98c9c7aa1f73c1. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f272ad2-c5d9-4af0-b2db-f7955a8953e4.json and https://artists.proofprofile.net/proofs/artist/0f272ad2-c5d9-4af0-b2db-f7955a8953e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).