1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda72c915c4616fd8cdf0a184c3b2f917fa77b4ea46b18fd21029fd55679ef830. 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/2dda66e8-a714-42a7-b2b6-4d57c8a6f2c1.json and https://artists.proofprofile.net/proofs/artist/2dda66e8-a714-42a7-b2b6-4d57c8a6f2c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kirchner, T.: Piano Quartet, Op. 84 / Schumann, R.: Piano Quartet, Op. 47
Piano Quartet in C Minor, Op. 84: I. Maestoso: Allegro molto
Piano Quartet in C Minor, Op. 84: II. Poco adagio
Piano Quartet in C Minor, Op. 84: III. Allegro
Piano Quartet in C Minor, Op. 84: IV. Animato
Piano Quartet in E-Flat Major, Op. 47: I. Sostenuto assai - Allegro ma non troppo
Piano Quartet in E-Flat Major, Op. 47: II. Scherzo: Molto vivace
Piano Quartet in E-Flat Major, Op. 47: III. Andante cantabile
Piano Quartet in E-Flat Major, Op. 47: IV. Finale: Vivace
Suk, J.: Piano Quartet, Op. 1 / Faure, G.: Piano Quartet No. 2
Piano Quartet in A Minor, Op. 1: I. Allegro appassionato
Piano Quartet in A Minor, Op. 1: II. Adagio
Piano Quartet in A Minor, Op. 1: III. Allegro con fuoco
Piano Quartet No. 2 in G Minor, Op. 45: I. Allegro molto moderato
Piano Quartet No. 2 in G Minor, Op. 45: II. Allegro molto
Piano Quartet No. 2 in G Minor, Op. 45: III. Adagio non troppo
Piano Quartet No. 2 in G Minor, Op. 45: IV. Adagio molto
Little Red Riding Hood and the Wolf, Op. 39/6 (Arr. By Dirk Mommertz)
The Sea and the Seagulls, Op. 39/2 (Arr. By Dirk Mommertz)
The Fair, Op. 33/6 (Arr. By Dirk Mommertz)
Funeral March, Op. 39/7 (Arr. By Dirk Mommertz)
Promenade I (Arr. By Dirk Mommertz & Grigory Gruzman)
The Gnome (Arr. By Dirk Mommertz & Grigory Gruzman)
Promenade II (Arr. By Dirk Mommertz & Grigory Gruzman)
The Old Castle (Arr. By Dirk Mommertz & Grigory Gruzman)
Promenade III (Arr. By Dirk Mommertz & Grigory Gruzman)
Tuileries (Arr. By Dirk Mommertz & Grigory Gruzman)
Bydlo (Arr. By Dirk Mommertz & Grigory Gruzman)
Promenade IV (Arr. By Dirk Mommertz & Grigory Gruzman)
Ballet of the Unhatched Chicks (Arr. By Dirk Mommertz & Grigory Gruzman)
Samuel Goldenberg and Schmuyle (Arr. By Dirk Mommertz & Grigory Gruzman)
Limoges (Arr. By Dirk Mommertz & Grigory Gruzman)
The Catacombs (Arr. By Dirk Mommertz & Grigory Gruzman)
Cum mortuis in lingua mortua (Arr. By Dirk Mommertz & Grigory Gruzman)
The Hut on Fowl's Legs - Baba Yaga (Arr. By Dirk Mommertz & Grigory Gruzman)
The Great Gate at Kiev (Arr. By Dirk Mommertz & Grigory Gruzman)
Songs My Mother Taught Me - Arr. By Fauré Quartett
Suite bergamasque: No. 3, Clair De Lune - Arr. by Matthias Kaufmann
Sometimes I'm Happy - Arr. By Jarkko Riihimäki
Glücklich Am Morgen - Arr. by Jarkko Riihimäki
Piano Quartet No. 2, Op. 2: III. Intermezzo. Allegro moderato
Klavierquartett in C-Moll Op. 13: I. Allegro
Strauss & Mahler - Piano Quartets & Lieder
Klavierquartett in C-Moll Op. 13: II. Scherzo
Klavierquartett in C-Moll Op. 13: III. Andante
Klavierquartett in C-Moll Op. 13: IV. Finale - Vivace
The Sound Of Yellow Lounge - Classical Music Mixed By DJ Clé