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 0xc4b3a857edac3e804b30cec7e89cc1a3f2f4146cc02413c1928c63e950ca2c66. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/296f75ca-9b7e-4745-8a55-3a1dcf86fc87.json and https://artists.proofprofile.net/proofs/artist/296f75ca-9b7e-4745-8a55-3a1dcf86fc87.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dolly Suite, Op. 56: No. 6 Le pas Espagnol
6 Preludes and Fugues, Op. 35: No. 3 in B Minor, Praeludium
6 Preludes and Fugues, Op. 35: No. 3 in B Minor, Fuga
Études, L. 136: No. 6 Pour les huit doigts
7 Piano Pieces in Fughetta Form, Op. 126: No. 1 Nicht schnell, leise vorzutragen
7 Piano Pieces in Fughetta Form, Op. 126: No. 2 Mässig
Geniuses of the Romantic Period, Vol. XI
Silhouettes, Op. 8: No. 6 Poco sostenuto
Jeux d'enfants, Op. 22: No. 6 Trompette et tambour
Polonaise in A-Flat Major, Op. 53 "Heroic"
6 Études, Op. 52: No. 5 Prélude et fugue
6 Études, Op. 52: No. 6 En forme de valse
Geniuses of the Romantic Period, Vol. XII
3 Études, Op. 31: No. 3 in E Major, La Nuit
24 Preludes, Op. 37: No. 5 Vivace assai quasi presto
24 Preludes, Op. 37: No. 6 Moderato, in carattere d'un corale
Suite Española No. 1, Op. 47: No. 5 Asturias
Suite Española No. 1, Op. 47: No. 6 Aragón
12 Etudes, Op. 8: No. 5 Etude in E Major
12 Etudes, Op. 8: No. 6 Etude in A Major
Années de pèlerinage I, S. 160: No. 1 Chapelle de Guillaume Tell
6 Preludes and Fugues, Op. 35: No. 1 in E Minor, Praeludium
Hungarian Dances, WoO 1: No. 1 in G Minor, Allegro molto (Arr. for Piano 4 Hands)
12 Études dans tous les tons majeurs, Op. 35: No. 1 in A Major, Allegretto
6 Pieces, Op. 19: No. 1 in G Minor, Rêverie du soir
4 Fugues, Op. 72: No. 1 in D Minor, Nicht schnell
6 Moments musicaux, D. 780: No. 1 in C Major, Moderato
Frühlingsboten, Op. 55: No. 1 Winterruhe
Années de pèlerinage I, S. 160: No. 2 Au lac de Wallenstadt
6 Preludes and Fugues, Op. 53: No. 1 in A-Flat Major, Prelude
Hungarian Dances, WoO 1: No. 2 in D Minor, Allegro non assai (Arr. for Piano 4 Hands)
Polonaises, Op. 26: No. 1 in C-Sharp Minor, Allegro appassionato
6 Pieces, Op. 19: No. 2 in D Major, Scherzo humoristique
Jeux d'enfants, Op. 22: No. 1 L'Escarpolette
24 Preludes, Op. 37: No. 1 in C Major, Moderato
Silhouettes, Op. 8: No. 1 in C-Sharp Minor, Allegro feroce
Suite Española No. 1, Op. 47: No. 1 in F Major, Granada
6 Moments musicaux, D. 780: No. 2 in A-Flat Major, Andantino
Années de pèlerinage I, S. 160: No. 3 Pastorale
6 Preludes and Fugues, Op. 35: No. 1 in E Minor, Fuga
Hungarian Dances, WoO 1: No. 3 in F Major, Allegretto (Arr. for Piano 4 Hands)
12 Études dans tous les tons majeurs, Op. 35: No. 2 in D Major, Allegro
6 Pieces, Op. 19: No. 3 in D Major, Feuillet d'album
4 Fugues, Op. 72: No. 2 in D Minor, Sehr lebhaft
Frühlingsboten, Op. 55: No. 2 Frühlingsnahen
Geniuses of the Romantic Period, Vol. II
Études, L. 136: No. 1 Pour les cinq doigts
Années de pèlerinage I, S. 160: No. 4 Au bord d'une source
6 Preludes and Fugues, Op. 53: No. 1 in A-Flat Major, Fugue
Hungarian Dances, WoO 1: No. 4 in F Minor, Poco sostenuto (Arr. for Piano 4 Hands)
Polonaises, Op. 26: No. 2 in E-Flat Minor, Maestoso
6 Pieces, Op. 19: No. 4 in C-Sharp Minor, Nocturne
24 Preludes, Op. 37: No. 2 in A Minor, Andantino sostenuto
Silhouettes, Op. 8: No. 2 in D-Flat Major, Andantino
6 Études, Op. 52: No. 2 Pour l'indépendance des doigts
Suite Española No. 1, Op. 47: No. 2 in G Minor, Cataluña
Geniuses of the Romantic Period, Vol. III
Années de pèlerinage I, S. 160: No. 5 Orage
6 Preludes and Fugues, Op. 35: No. 2 in D Major, Praeludium
Barcarolle No. 3 in G-Flat Major, Op. 42
Hungarian Dances, WoO 1: No. 5 in F-Sharp Minor, Allegro (Arr. for Piano 4 Hands)
12 Études dans tous les tons majeurs, Op. 35: No. 3 Andantino
4 Fugues, Op. 72: No. 3 Nicht schnell und sehr ausdrucksvoll
6 Moments musicaux, D. 780: No. 3 Allegro moderato
Geniuses of the Romantic Period, Vol. IV
12 Etudes, Op. 8: No. 1 Etude in C-Sharp Major
12 Etudes, Op. 8: No. 2 Etude in F-Sharp Minor
Années de pèlerinage I, S. 160: No. 6 Vallée d'Obermann
6 Preludes and Fugues, Op. 53: No. 2 in F Minor, Prelude
Hungarian Dances, WoO 1: No. 6 in D-Flat Major, Vivace (Arr. for Piano 4 Hands)
Polonaises, Op. 40: No. 1 in A Major, Allegro con brio "Military"
6 Pieces, Op. 19: No. 6 Thème original et variations
24 Preludes, Op. 37: No. 3 Andante con moto
6 Études, Op. 52: No. 3 Prélude et fugue
Suite Española No. 1, Op. 47: No. 3 Sevilla
6 Moments musicaux, D. 780: No. 4 Moderato
Années de pèlerinage I, S. 160: No. 7 Eglogue
6 Preludes and Fugues, Op. 35: No. 2 in D Major, Fuga
Barcarolle No. 4 in A-Flat Major, Op. 44
Hungarian Dances, WoO 1: No. 7 in F Major, Allegretto (Arr. for Piano 4 Hands)
12 Études dans tous les tons majeurs, Op. 35: No. 4 Presto
4 Fugues, Op. 72: No. 4 Im mäßigen Tempo
Geniuses of the Romantic Period, Vol. VI
Dolly Suite, Op. 56: No. 3 Le jardin de Dolly
Années de pèlerinage I, S. 160: No. 8 Le mal du pays
6 Preludes and Fugues, Op. 53: No. 2 in F Minor, Fugue
Hungarian Dances, WoO 1: No. 8 in A Minor, Presto (Arr. for Piano 4 Hands)
Polonaises, Op. 40: No. 2 in C Minor, Allegro maestoso
Jeux d'enfants, Op. 22: No. 4 Les chevaux de bois
Suite Española No. 1, Op. 47: No. 4 Cádiz
Geniuses of the Romantic Period, Vol. VII
Années de pèlerinage I, S. 160: No. 9 Les cloches de Genève
3 Études, Op. 31: No. 3 in E Major "La Nuit"
Barcarolle No. 5 in F-Sharp Minor, Op. 66
Hungarian Dances, WoO 1: No. 9 in E Minor, Allegro non troppo (Arr. for Piano 4 Hands)
12 Études dans tous les tons majeurs, Op. 35: No. 5 Allegro barbaro
6 Moments musicaux, D. 780: No. 5 Allegro vivace
Frühlingsboten, Op. 55: No. 5 Annäherung
Geniuses of the Romantic Period, Vol. VIII
12 Etudes, Op. 8: No. 3 Etude in B Minor
12 Etudes, Op. 8: No. 4 Etude in B Major
Années de pèlerinage II, S. 161: No. 1 Sposalizio
6 Preludes and Fugues, Op. 53: No. 3 in E Major, Prelude
Hungarian Dances, WoO 1: No. 10 in E Major, Presto (Arr. for Piano 4 Hands)
Geniuses of the Romantic Period, Vol. IX
6 Moments musicaux, D. 780: No. 6 Allegretto
Geniuses of the Romantic Period, Vol. XIII
2 Scherzos, D. 593: I. Scherzo in B-Flat Major
2 Scherzos, D. 593: II. Scherzo in D-Flat Major
Geniuses of the Romantic Period, Vol. XIV
6 Preludes and Fugues, Op. 35: No. 4 in A-Flat Major, Praeludium
6 Preludes and Fugues, Op. 35: No. 4 in A-Flat Major, Fuga
Études, L. 136: VII. Pour les degrés chromatiques
Études, L. 136: VIII. Pour les agréments
7 Piano Pieces in Fughetta Form, Op. 126: III. Ziemlich bewegt
7 Piano Pieces in Fughetta Form, Op. 126: IV. Lebhaft
Geniuses of the Romantic Period, Vol. XV
Jeux d'enfants, Op. 22: VII. Les bulles de savon
Jeux d'enfants, Op. 22: VIII. Les quatre coins
Piano Sonata No. 1 in F Minor, Op. 2 No. 1: I. Allegro
Piano Sonata No. 1 in F Minor, Op. 2 No. 1: II. Adagio
Geniuses of the Romantic Period, Vol. XVI
24 Preludes, Op. 37: 8. Allegro moderato
Suite Española No. 1, Op. 47: VII. Castilla
Suite Española No. 1, Op. 47: VIII. Cuba
12 Etudes, Op. 8: VII. Etude in B-Flat Minor
12 Etudes, Op. 8: VIII. Etude in A-Flat Major