Igor Konstantin Buketoff (29 May 19157 September 2001) was an American conductor, arranger and teacher. He had a special affinity with Russian classical music and with Sergei Rachmaninoff in particul
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21d3016751b10f7e44c2c181ad0f2c5284ab6a63c224622849f7f845ccea1b2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73b90a60-093d-44be-8daa-71c9803a1a2e.json and https://artists.proofprofile.net/proofs/artist/73b90a60-093d-44be-8daa-71c9803a1a2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rachmaninoff: Monna Vanna & Piano Concerto No. 4