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 0xb8639f77f1d78fa04e0bc177eb6e1770786a4bea846b69d014b0bf5a63fed6f9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7111a214-4575-439a-a2d0-e14c108a00ff.json and https://artists.proofprofile.net/proofs/artist/7111a214-4575-439a-a2d0-e14c108a00ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Piano Concerto No. 24 in C Minor, K. 491: III. Allegretto
Géza Anda and Clara Haskil play Bach and Bartók (Lucerne Festival Historic Performances Vol. 17)
Lucerne Festival Historic Performances: Isaac Stern
Lucerne Festival Historic Performances: Pierre Fournier
Lucerne Festival Historic Performances: Rafael Kubelik (Béla Bartók: Herzog Blaubarts Burg, Sz. 48)
Lucerne Festival Historic Performances: Annie Fischer & Leon Fleisher
Lucerne Festival Historic Performances: Carl Schuricht (Live)
Lucerne Festival Historic Performances: Wolfgang Schneiderhan (Live)
Herbert von Karajan - The Early Lucerne Years
Lucerne Festival Historic Performances: Wilhelm Furtwängler (Live) [Schumann: Manfred Overture & Symphony No. 4 - Beethoven: Symphony No. 3 'Eroica']
Lucerne Festival Historic Performances: Paul Kletzki
Lucerne Festival Historic Performances: George Szell (Live)
Lucerne Festival Historic Performances: Nathan Milstein (Mendelssohn & Dvořák: Violin Concertos) [Live]
Mendelssohn: Die erste Walpurgisnacht, Op. 60, MWV D 3 & Violin Concerto in E Minor, Op. 64, MWV O 14 (Live)