thumb Parashkev Hadjiev (Bulgarian: Парашкев Хаджиев; born in Sofia, Bulgaria, 27 April 1912 – 1992) was a Bulgarian composer. He was the son of conductor Todor Hadjiev, an early champion of Bulgaria
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 0xd6d83afe86cd5a27e1dfbfc80d5410645a2891d7a2bfa784f7d2c6cda6cb1f4f. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4eb03712-1258-4e37-a6a1-a4631ac81405.json and https://artists.proofprofile.net/proofs/artist/4eb03712-1258-4e37-a6a1-a4631ac81405.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Парашкев Хаджиев: Сребърните пантофки - музика из балета
Парашкев Хаджиев: Мария-Десислава, Опера
Парашкев Хаджиев: Мария Десислава, опера
Парадокси: Три едноактни опери от Парашкев Хаджиев