Leonov (masculine, ) or Leonova (feminine, ) is a Russian surname. Notable people with the surname include: Aleksandra Leonova (born 1964), Russian women's basketball player Aleksandr Leonov (born 19
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 0xd2792dead5f55a21bfd16548c0b662d2fade04ba81ceb3ba4aa8603bb3b9b39d. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77d7e8b8-a9bb-4cb5-a787-ae0c88e6bdbd.json and https://artists.proofprofile.net/proofs/artist/77d7e8b8-a9bb-4cb5-a787-ae0c88e6bdbd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).