Antico may refer to: People Andrea Antico ( 1480 – after 1538), Renaissance music printer active in Rome; Ottaviano Petrucci's first competitor Anthony Antico (1935–2020), American mobster Antico
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 0x174f998f44ddd2e9231c8168a148745c29bf50a0ddfb1f59c3f8617fde33c5ae. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/913b7163-80fc-483c-b7ad-c7521802bd99.json and https://artists.proofprofile.net/proofs/artist/913b7163-80fc-483c-b7ad-c7521802bd99.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).