Alexander Sparinsky (, ; is a Ukrainian musicologist, composer and producer. A member of Ukrainian Association of Cinematographers. Biography Sparinsky studied at the Kyiv Pedagogical Institute (no
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 0x0359ca8e14f62fad9cbcb110a906bffa433ae4639d50956e18b2e1484ff77ce1. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9843a914-00af-4950-84a7-2e2bfcca3fa6.json and https://artists.proofprofile.net/proofs/artist/9843a914-00af-4950-84a7-2e2bfcca3fa6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kids Cartoon Music (Instrumental Works collection for children)
Evolution (Electronic music and EDM from various years)
Ukraine - the Best (Thematic Ukrainian Edition)
Early Years (Instrumental Works Collection)
Russian Songs (Songs of Various Years in Russian)