Andrei Borisovich Diev (), born on 7 July 1958 in Minsk, BSSR (now Belarus), is a Russian pianist, Meritorious Artist (1995)Honorary title awarded by the decree of President of Russia № 1325 from Dece
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 0x10a19d4599cdeed4bbaa4c3775ee2c3fdeeb31d9c919cc26612ec6127c04e53b. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbf87ac4-f1bc-41b3-92d3-f8c8f3e17725.json and https://artists.proofprofile.net/proofs/artist/fbf87ac4-f1bc-41b3-92d3-f8c8f3e17725.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sergey Rachmaninov. 24 Preludes. Andrei Diev (Piano)