Piero is an Italian given name. Notable people with the name include: Piero Angela (1928–2022), Italian television host Piero Barucci (born 1933), Italian academic and politician Piero Cari (born 200
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 0x5565f8cab76bb478e6046bb32c5e4da6425de67e2e5e48c0d61c94acdc7a85d9. 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/818ba028-bad5-4f7d-b2a9-5b72ca07660c.json and https://artists.proofprofile.net/proofs/artist/818ba028-bad5-4f7d-b2a9-5b72ca07660c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).