thumb|Louis Lortie Louis Lortie (born 27 April 1959) is a Canadian pianist. Education Born in Montreal, LortieJean-Pierre Thiollet, 88 notes pour piano solo, Neva Editions, 2015, "Solo nec plus u
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 0xde904bb513ee8dac08999ff4aafe6cfcf6fe6de19bc31920971b6c2529aa4b6e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/818556a0-4b72-4369-9562-842ef29aea1c.json and https://artists.proofprofile.net/proofs/artist/818556a0-4b72-4369-9562-842ef29aea1c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Saint-Saëns: Piano Concertos Nos. 1, 2 & 4
Liszt: Works for Piano & Orchestra, Vol. 3
d'Indy: Symphonie sur un Chant Montagnard Français, Saugefleurie, Médée & Prelude to Fervaal