Simon Vouet (; 9 January 1590 – 30 June 1649) was a French painter who studied and rose to prominence in Italy before being summoned by Louis XIII to serve as Premier peintre du Roi in France. He and
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271c298d82844246160a58449f51df637cdbcac6047c18ce6301f94f916bfb6e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffa9bcf6-3f2f-4676-8abd-4d63fcdc4793.json and https://artists.proofprofile.net/proofs/artist/ffa9bcf6-3f2f-4676-8abd-4d63fcdc4793.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).