Lukas Johannes Hagen (born 8 May 1962) is an Austrian violinist and music educator. He is first violinist of the Hagen Quartet. Life Born in Salzburg, Hagen is the eldest son of a solo viola player
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 0xe11d3e5d149ca877bc362366704c2fc2dc83f1f5f8cc0a905e698809903cf977. 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/a11584a9-0a60-4ea1-9835-2bb0263b781a.json and https://artists.proofprofile.net/proofs/artist/a11584a9-0a60-4ea1-9835-2bb0263b781a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Haydn, J.: Violin Concerto in G Major / Haydn, M.: Violin Concerto in B-Flat Major / Mozart: Adagio