Zatonsky () is a surname. Notable people with the surname include: Dmitry Zatonsky (born 1971), Russian ice hockey player Volodymyr Zatonsky (1888–1938), Soviet academic, politician, and activist
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 0x6bf842f0a45c22105095c159d8a738538543469c21c7b9e3f5f8384bb7e06034. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa89055a-f861-4f2c-bc11-8c64edea0b8e.json and https://artists.proofprofile.net/proofs/artist/fa89055a-f861-4f2c-bc11-8c64edea0b8e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.