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 0x3a260bd4047edb0ddcc3022039ad11b0669d176b8c8cd227af5ee2fd9e555734. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbc77126-217c-4913-aa9e-4bdfa88d03a4.json and https://artists.proofprofile.net/proofs/artist/dbc77126-217c-4913-aa9e-4bdfa88d03a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sonate h-moll, Op. 5: I. Allegro molto appassionato
Sonate h-moll, Op. 5: II. Adagio cantabile
Sonate h-moll, Op. 5: III. Scherzo. Presto - Trio. Un poco più lento
Sonate h-moll, Op. 5: IV. Finale. Allegretto vivo
Stimmungsbilder, Op. 9: No. 1, Auf stillem Waldespfad
Stimmungsbilder, Op. 9: No. 2, An einsamer Quelle
Stimmungsbilder, Op. 9: No. 3, Intermezzo
Stimmungsbilder, Op. 9: No. 4, Träumerei
Stimmungsbilder, Op. 9: No. 5, Heidebild
Fünf Klavierstücke, Op. 3: No. 1, Andante
Fünf Klavierstücke, Op. 3: No. 2, Allegro vivace scherzando
Fünf Klavierstücke, Op. 3: No. 4, Allegro molto
Fünf Klavierstücke, Op. 3: No. 5, Allegro marcatissimo
Variations on a German National Air, op.posth.
Rondo a la Mazur, op.5 in F major: Vivace
Variations Brillantes on a Theme from Herold's "Ludovic"
Sonate h-moll, Op. 5, Allegro molto appassionato
Sonate h-moll, Op. 5 - Scherzo. Presto - Trio. Un poco più lento
Sonate h-moll, Op. 5 - Finale. Allegretto vivo
Stimmungsbilder, Op. 9- No. 1, Auf stillem Waldespfad
Stimmungsbilder, Op. 9 - No. 2: An einsamer Quelle
Stimmungsbilder, Op. 9 No. 3: Intermezzo
Stimmungsbilder, Op. 9 - No. 4: Träumerei
Stimmungsbilder, Op. 9 - No. 5: Heidebild
Fünf Klavierstücke, Op. 3 - No. 1: Andante
Fünf Klavierstücke, Op. 3 - No. 2: Allegro vivace scherzando
Fünf Klavierstücke, Op. 3 - No. 3: Largo
Fünf Klavierstücke, Op.3 - No. 4: Allegro molto
Fünf Klavierstücke, Op. 3 - No. 5: Allegro marcatissimo
Ignacy Friedman: Mazurka No.1 in C Major, Op. 15: Vivace e sciolto
Ignacy Friedman: Mazurka No.2 in B Major, Op. 15: Moderato e molto espressivo
Ignacy Friedman: Mazurka No.3 in G Minor, Op. 15: Mesto e tranquilo
Ignacy Friedman: Mazurka No.4 in E-Flat Major, Op. 15: Allegretto
Ignacy Friedman: Mazurka No.5 in E-Flat Major, Op. 15: Vivo e feroce
Ignacy Friedman: Mazurka No.3 in C Major, Op. 27: Vivo, con grazia
Ignacy Friedman: Mazurka No.2 in D Major, Op. 33: Assai vivo
Ignacy Friedman: Mazurka No.4 in G Major, Op. 38b: Quasi Andantino, languido
Ignacy Friedman: "Two Mazurkas" - Mazurka No.1 in E-Flat Minor, Op. 49: Tempo giusto
Ignacy Friedman: "Two Mazurkas" - Mazurka No.2 in C Minor, Op. 49: Tempo giusto
Ignacy Friedman: Mazurka No.2 in D Major, Op. 59: Allegretto grazioso
Ignacy Friedman: "Six Mazurkas" - Mazurka No.1 in E Major, Op. 85: Allegretto, semplice
Ignacy Friedman: "Six Mazurkas" - Mazurka No.2 in D Minor, Op. 85: Sciolto, vivace
Ignacy Friedman: "Six Mazurkas" - Mazurka No.3 in G Minor, Op. 85: Con sentimiento, quasi Andante
Ignacy Friedman: "Six Mazurkas" - Mazurka No.4 in C Major, Op. 85: Allegro molto, ritmico
Ignacy Friedman: "Six Mazurkas" - Mazurka No.5 in D Major, Op. 85: Allegretto piacevole
Ignacy Friedman: "Six Mazurkas" - Mazurka No.6 in B Major, Op. 85: Energico
Ignacy Friedman: A la Mazourka in A Minor No.2, Op. 96
Aleksander Michałowski: Mazurka in E-Flat Major: Poco moderato
Aleksander Michałowski: Mazurka in A Minor: Allegretto
Aleksander Michałowski: Mazurka in F-Sharp Major: Allegretto
Aleksander Michałowski: Mazurka No.1 in F-Sharp Minor, Op. 5: Allegretto
Aleksander Michałowski: Mazurka No.2 in C-Sharp Minor, Op. 6: Lento
Aleksander Michałowski: Mazurka in F Minor No.3, Op. 7: Sostenuto
Aleksander Michałowski: Mazurka in A-Flat Major, Op. 16 : Vivo e risoluto
Aleksander Michałowski: Mazurka in C-Sharp Minor, Op. 17: Poco lento
Aleksander Michałowski: Mazurka in F Major, Op. 18: Vivace
Aleksander Michałowski: Mazurka in E Minor, Op. 19: Lento
Aleksander Michałowski: Mazurka No.1 in B Minor, Op. 31: Allegretto
Piano Concerto in B Minor, Op. 3: I. Allegro
Moszkowski: Piano Concerto, Op. 3 (Hyperion Romantic Piano Concerto 68)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220e18dd554364b0e374539037bec7b1850f7bc4ded49e338fe7e7b818bc112c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1510901.
Piano Concerto in B Minor, Op. 3: II. Adagio –
Piano Concerto in B Minor, Op. 3: III. Scherzo. Molto vivace
Piano Concerto in B Minor, Op. 3: IV. Allegro sostenuto – Allegro con spirito
Belshazzar's Feast, Op. 51: Mazurka in A minor, Op. posth.
Rarities of Piano Music at »Schloss vor Husum« from the 2013 Festival
An American in Paris (Version for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3f8ab5a86d0278db252691f6892134c67bf2032a7d7b2b544db7b607f1d5d8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420300701.
Oh, Kay!: Someone to watch over me (Version for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f55e34e1f347c6ad1dddcd96b4d5021f221830194f5da61b948133dd5b18e99. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420300711.
Oh, Kay!: Clap yo'hands (Version for Violin & Piano)
Girl Crazy: I Got Rhythm (Version for Violin & Piano)
Rhapsody in blue (Version for Violin & Piano)
3 Preludes (Arr. J. Heifetz for Violin & Piano): No. 3 in E-Flat Minor, Allegro ben ritmato e deciso