Todor Todorov may refer to: Todor Todorov (bobsleigh) (born 1961), Bulgarian bobsledder Todor Todorov (gymnast) (1928–2023), Bulgarian Olympic gymnast Todor Todorov (sculptor) (born 1951), Bulgari
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 0x2d831c88860b5605032c2333b63c37ba5adf89a80bf10457d5b034b72e5a3858. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8182e5e8-3209-465e-8f0a-d86b2bd4a3f7.json and https://artists.proofprofile.net/proofs/artist/8182e5e8-3209-465e-8f0a-d86b2bd4a3f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).