Jukka Santeri Tiensuu (born 30 August 1948) is a Finnish contemporary classical composer, harpsichordist, pianist and conductor. Career Tiensuu was born in Helsinki. After extensive musical studies (
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 0x24e4fa6a6f4434e7baebbe94119d00cce3c7889dd3fa36a90dd5a2d072efb8f8. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2feadc19-f97a-4b21-b0a0-1ae531b31e9d.json and https://artists.proofprofile.net/proofs/artist/2feadc19-f97a-4b21-b0a0-1ae531b31e9d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Harpsichord Recital: Tiensuu, Jukka - Couperin, F. / Scarlatti, D. / Kouneva, P. / Tiensuu, J. / Salmenhaara, E. / Cage (The Frivolous Harpsichord)
Tiensuu, J.: Nemo / Clarinet Concerto, Puro / Spirit
Tiensuu: Vie - Missa - False memories I-III
Tiensuu: Tengo lunaire / oddjob / Plus IV / Prelude non-mesure / Beat / Erz