Kirill Vladimirovich Pokrovsky (Kирилл Владимирович Покровский; 25 March 1962 – 1 June 2015) was a Russian composer and musician. Kirill Pokrovsky learned to play and compose music from a young age,
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 0xc775bc8bdec85da3832396322c72ef2d3625b1e406bf50120208f64155c4de6e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c61e7852-3e02-46c2-a9d2-35a51b16211e.json and https://artists.proofprofile.net/proofs/artist/c61e7852-3e02-46c2-a9d2-35a51b16211e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).