Antonio Mosca (27 May 1870 – 29 May 1951) was an Italian painter. Biography Mosca was born in Pieve di Cento, and died in Bologna. Born to a humble family, he obtained a stipend from the Pious Legacy
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 0xf346cc6f0923b354683039dc8cfed70206f7b50f8ccb04187999df30b281da9a. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bb86363-0e90-492d-a7d9-3779d207e0ab.json and https://artists.proofprofile.net/proofs/artist/9bb86363-0e90-492d-a7d9-3779d207e0ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).