Elmira Sergeyevna Zherzdeva (; 6 March 1936 – 18 May 2023) was a Soviet and Russian singer and Meritorious Artist (since 1992). Early life and career Zherzdeva was born in Bolokhovo, Soviet Union.
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 0x8efed25cbfdb987dd46fdc9363e15b54579bd4da1a3f77f82e93414f87ff8182. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a710d6f-9151-438c-9712-26858a63e84d.json and https://artists.proofprofile.net/proofs/artist/7a710d6f-9151-438c-9712-26858a63e84d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).