Igor may refer to: Igor (given name), an East Slavic given name and a list of people with the name Arts, entertainment, and media Igor (character), a stock character Igors (Discworld), a fictional
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 0x6598070c7bc29f47e7d10e9071ddcddf6b2dc92d36ed723e38fb2a3fb38cf35d. Chain 2 (Bitcoin): anchored in block 953888 (2026-06-16T04:55:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cf3ffe2-53a8-48fe-9c9a-d5903f144557.json and https://artists.proofprofile.net/proofs/artist/0cf3ffe2-53a8-48fe-9c9a-d5903f144557.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).