Alfred Viola (June 16, 1919 – February 21, 2007) was an American jazz guitarist who worked with Frank Sinatra for 25 years. He played the mandolin on the soundtrack of the film The Godfather. Biograp
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 0x1a030fe4cf43f3f74326824943d03e26c469f6ba19b57059f99c8f8e24282f85. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b30937dd-38f3-478c-a4f2-a4e7256402fc.json and https://artists.proofprofile.net/proofs/artist/b30937dd-38f3-478c-a4f2-a4e7256402fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).