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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dac9098a6e07d37b2c3dba11d533a9761cb0ce24d058785bab193d87e2dd53. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21e682de-5c76-44b5-a271-748a3963f591.json and https://artists.proofprofile.net/proofs/artist/21e682de-5c76-44b5-a271-748a3963f591.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Volker, Op. 203: No. 1, Abschied von Alzey. Larghetto
Volker, Op. 203: No. 2, Da er zum Bannerträger erkoren war. Andante
Volker, Op. 203: No. 3, Im Rosengarten zu Worms. Tranquillo
Volker, Op. 203: No. 4, Da Siegfried erschlagen war. Allegro
Volker, Op. 203: No. 5, Was er von Werbelein gelernt. Larghetto
Volker, Op. 203: No. 6, Dank zu Bechelaren. Adagio con moto
Volker, Op. 203: No. 7, Auf der Nachtwache. Kampflied
Volker, Op. 203: No. 8, Auf der Nachtwache. Schlummerlied
Volker, Op. 203: No. 9, Schwanengesang. Larghetto
Weinberg / Weprik / Shostakovich: Piano Trios
Piano Trio, Op. 24: I. Praludium und Arie: Larghetto
Piano Trio, Op. 24: II. Toccata. Allegro marcato
Piano Trio, Op. 24: IV. Finale. Allegro moderato
3 Folk Dances, Op. 13b: No. 1, Allegro moderato (Version for piano trio)
3 Folk Dances, Op. 13b: No. 2, Lento (Version for piano trio)
3 Folk Dances, Op. 13b: No. 3, Allegro (Version for piano trio)
Piano Trio No. 2 in E Minor, Op. 67: I. Andante
Piano Trio No. 2 in E Minor, Op. 67: II. Allegro con brio
Piano Trio No. 2 in E Minor, Op. 67: III. Largo
Piano Trio No. 2 in E Minor, Op. 67: IV. Allegretto
heimwehgefiedert: No. 1, Schneide das Augenlid ab
heimwehgefiedert: No. 4, Vögel mit Wurzeln
heimwehgefiedert: No. 7, Nicht müde werden
2 Gesänge, Op. 91: No. 1, Gestillte Sehnsucht
2 Gesänge, Op. 91: No. 2, Geistliches Wiegenlied
Judische Volkslieder, Sammlung I, Op. 7 (Excerpts Arr. for Voice, Viola & Piano): No. 1. Mein Spielen
Judische Volkslieder, Sammlung III, Op. 10: No. 3. Das goldene Kalb (Arr. for Voice, Viola & Piano)
Judische Volkslieder, Sammlung I, Op. 7 (Excerpts Arr. for Voice, Viola & Piano): No. 2. Das Gebet
3 Lieder, Op. 3a: No. 1, Nun die Schatten dunkeln
3 Lieder, Op. 3a: No. 2, Wonne der Wehmut
3 Lieder, Op. 3a: No. 3, Aus den Himmelsaugen droben
Shostakovich, D.: Aphorisms / Weinberg, M.: Children's Notebooks / Nemtsov, S.: 20 Sketches
Children's Notebook, Book 1, Op. 16: No. 1, Larghetto
Children's Notebook, Book 1, Op. 16: No. 2, Allegro
Children's Notebook, Book 1, Op. 16: No. 3, Moderato maestoso
Children's Notebook, Book 1, Op. 16: No. 4, Tempo di valse
Children's Notebook, Book 1, Op. 16: No. 5, Allegretto
Children's Notebook, Book 1, Op. 16: No. 6, Presto
Children's Notebook, Book 1, Op. 16: No. 7, Andante tranquillo
Children's Notebook, Book 1, Op. 16: No. 8, Larghetto
Children's Notebook, Book 2, Op. 19: No. 1, Largo
Children's Notebook, Book 2, Op. 19: No. 2, Allegretto
Children's Notebook, Book 2, Op. 19: No. 3, Moderato
Children's Notebook, Book 2, Op. 19: No. 4, Lento
Children's Notebook, Book 2, Op. 19: No. 5, Allegro
Children's Notebook, Book 2, Op. 19: No. 6, Andantino
Children's Notebook, Book 2, Op. 19: No. 7, Marziale lugubre
Children's Notebook, Book 2, Op. 19: No. 8, Andante
Children's Notebook, Book 3, Op. 23: No. 1, Allegro marcato
Children's Notebook, Book 3, Op. 23: No. 2, Allegro commodo
Children's Notebook, Book 3, Op. 23: No. 3, Moderato
Children's Notebook, Book 3, Op. 23: No. 4, Prestissmo
The Krein Family: World Premiere Recordings
Shostakovich, D.: 24 Preludes / Zaderatsky, V.P.: 24 Preludes
Wolfsohn, J.: Jewish Rhapsody / Hebrew Suite / Paraphrases On Old Jewish Folk Songs / Liszt, F.: Hungarian Rhapsodies
Geringas, David / Nemtsov, Jascha: Eli Zion - From St. Petersburg To Jerusalem
Schneiderman, Helene / Nemtsov, Jascha: On Wings of Jewish Songs
Raff: Works for Violin and Piano, Vol. 2
Raff: Works for Violin and Piano, Vol. 1
Meyer / Nemtsov: Jewish Songs Without Words
Bernhard Sekles: Fanasietten Op.42 - Andantino
Milken Archive of Jewish Music: The American Experience
Violin Sonata No. 4 in G Minor, Op. 129, "Chromatic Sonata"
Raff: Violin and Piano Works, Vol. 4 - Violin Sonatas No. 4 and 5
Sonatillen, Op. 99: No. 1. Allegro agitato
Violin Sonata No. 5 in C Minor, Op. 145: I. Allegro patetico
Violin Sonata No. 5 in C Minor, Op. 145: II. Andante
Violin Sonata No. 5 in C Minor, Op. 145: III. Presto
Violin Sonata No. 5 in C Minor, Op. 145: IV. Allegro agitato