Deiro is a surname. Notable people with the surname include: Guido Deiro (1886–1950), Italian vaudeville star, recording artist, composer, and teacher Pietro Deiro (1888–1954), Italian accordionist
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 0xfff1a3afe8f2ca3897ee895a4b95d0c708e3a7465fd722b21bf212c5d3e3c13e. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2c9bb89-1e8b-4d78-ae39-6985dfd97335.json and https://artists.proofprofile.net/proofs/artist/a2c9bb89-1e8b-4d78-ae39-6985dfd97335.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).