Natalia Ponomarchuk (Ukrainian: Наталія Пономарчук) (born 1969)Espectaculoteatrocervantes.com is a Ukrainian orchestral conductor. She is currently touring with the Ukrainian State Symphony Orchestra
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 0x723fec4dc1ff61ed8c7386bed37b5f255f534176cba298aa260c8d7d7189273f. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/244f6e18-355b-469d-bc71-95483533470a.json and https://artists.proofprofile.net/proofs/artist/244f6e18-355b-469d-bc71-95483533470a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).