Saimir Pirgu (born 23 September 1981 in Elbasan) is an Albanian international opera singer (tenor). In 2014 he was awarded the Italian citizenship by the President of the Italian Republic Giorgio Napo
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 0x0d5a09f63c6485b01ea721db1918ca948bd5673db8a83b2d8e8286cf501f5956. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0c2a190-e4d0-45cd-ac48-eaede881aacc.json and https://artists.proofprofile.net/proofs/artist/e0c2a190-e4d0-45cd-ac48-eaede881aacc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.