Vaccaro is a surname. Notable people with the surname include: Adolfo Vaccaro (1927–2020), Paraguayan football player and coach Alessandra Melucco Vaccaro (1940–2000), Italian historian and archaeo
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 0xa9914f84b4d575e8cfc1e2e2fb2cd9d4f5c3bf877247f28314ced9f1e732c813. 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/56d3322a-6dac-41ac-8924-925bd0ce0e51.json and https://artists.proofprofile.net/proofs/artist/56d3322a-6dac-41ac-8924-925bd0ce0e51.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.