Jens Hoffmann Mesén (born 1974 in San José, Costa Rica) is a writer, editor, educator, and exhibition maker. His work has attempted to expand the definition and context of exhibition making. From 2003
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 0x5c9e81e756a509c8912a2a80b1ca6a563dec18df4018bed5fde5bbd345b88608. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f361ed3d-1528-47db-80d7-141d7cac470f.json and https://artists.proofprofile.net/proofs/artist/f361ed3d-1528-47db-80d7-141d7cac470f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Virtuose Salonmusik des Kreises um Franz Liszt