Christov (feminine: Christova) is a Bulgarian surname, and is a variant of Christ. Notable people with the surname include: Carolyn Christov-Bakargiev (born 1957), Italian–American art historian, cr
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 0xf7fc3cb08093ea736caf5c6c3787261877fb0677269b41f74f5cd3c55f9d2756. Chain 2 (Bitcoin): anchored in block 953922 (2026-06-16T09:36:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b02bbff-ce81-4d14-9596-24c0ba7fb5f2.json and https://artists.proofprofile.net/proofs/artist/1b02bbff-ce81-4d14-9596-24c0ba7fb5f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).