Margarita Levchuk (Belarusian Маргарыта Аляксандраўна Ляўчук, Marharyta Liauchuk; born 16 April 1990) is a Belarusian opera singer (soprano). She is a soloist of the Musical House "Classics"; a solois
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 0x16f6729ecff834a69da5c749f186c0277d526f63701771fbd75ae78af655cd47. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b25af83-6f07-4283-bcb5-b4ed42a98731.json and https://artists.proofprofile.net/proofs/artist/9b25af83-6f07-4283-bcb5-b4ed42a98731.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).