thumb|Sitkovetsky Trio in 2023, Alexander on the left Alexander Sitkovetsky (born 1983) is a British violinist. Biography Family Sitkovetsky was born in Moscow to a musical family; his father being
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 0xa7a2a9853ce92e58a7fd57b7653fd5cef5a7947b3b552c895d6174c48310048f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dec432d9-3a27-491e-968c-c6f12755f9c4.json and https://artists.proofprofile.net/proofs/artist/dec432d9-3a27-491e-968c-c6f12755f9c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).