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 0x471a8fc9a7cfbfa869b07f0b1296e72c1c844a66c70402bb947a4fa56dbbc1e3. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1558a933-9e40-4030-8dfd-76a58e9a5d4a.json and https://artists.proofprofile.net/proofs/artist/1558a933-9e40-4030-8dfd-76a58e9a5d4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).