Vassily Primakov () is a Russian concert pianist and recording artist known for his interpretations of Chopin. Education Primakov was born in Moscow and began studies at Moscow's Central Special Musi
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 0x66d44fed8ce51a9450faa07ae8c239da18d8743170d9589897809a88bd1b18f5. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8190f920-2f1d-4bd1-80ec-e099002cb3d1.json and https://artists.proofprofile.net/proofs/artist/8190f920-2f1d-4bd1-80ec-e099002cb3d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2001 Van Cliburn International Piano Competition Preliminary Round
2001 Van Cliburn International Piano Competition Semifinal Round