Salvatore Pace (1679 – April 13, 1733) was an Italian painter of the late-Baroque. Biography He was born in Naples and trained and worked in the studio of Francesco Solimena. He often restored works
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4266b6ec93e6927d16a557ed0eb5f5cdb33b98becfdf5b87ae3eccc5fc02382. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c865c02-5ed6-4bb0-b1c1-04d23fcf3dde.json and https://artists.proofprofile.net/proofs/artist/4c865c02-5ed6-4bb0-b1c1-04d23fcf3dde.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).