thumb|Adolf Jensen thumb|Grave monument in the main cemetery of Baden-Baden Adolf Jensen (12 January 1837 – 23 January 1879) was a German pianist, composer and music teacher. Biography Jensen was bor
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4087a64017bb4048a85735048ff24eda03c500bf56e552bcfd7466a9ae346223. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8b21d86-c8c6-4f8d-abb6-1a3ed989c189.json and https://artists.proofprofile.net/proofs/artist/b8b21d86-c8c6-4f8d-abb6-1a3ed989c189.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lehmann, Lotte: Lieder Recordings, Vol. 1 (1935-1937)
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 → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a0d7083cee7cff161bf743cf95f3d969df2907f9547bb45e404e68d06945ce. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAJY8611213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c842b3188a82af18929e6894167363edd713909f515e98454422d19e44b2c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAJY8611214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105630248f3cde5b1a5840226a83e93ca38c5300c4b55136bd7e97cc0e779cfd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBAJY8611218.
Piano Exam Pieces 2015 & 2016, ABRSM Grade 5
Zephrys. Piano Evocations from the Golden Age
Murmuring Zephyrs. (Murmelndes Luftchen) Op. 21, No .4 - Duca 10
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f390e05c45adc1a4876ca3fde1468246ef355e708c60ffbddb0c2829700bec. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/DEPI82416647.
Bach, JS: Jauchzet Gott in allen Landen, BWV 51: No. 1, Aria. "Jauchzet Gott in allen Landen"
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Eroticon, Op. 44: I. Kassandra. Sehr bewegt
Eroticon, Op. 44: III. Galatea. Mit zartestem Ausdruck
Lehn' deine Wang' an meine Wang' (Piano)
10 Pièces de genre, Op. 10: No. 5, Mélodie in E Minor "Élégie"
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Waltz in B-Flat Major, "Gertrude’s Dream"
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3 Gymnopédie: No. 3 in A Minor: Lent et grave
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Concerto No. 4 in F Minor, Op. 8, RV 297, Four Seasons "Winter": II. Largo in E-Flat Major
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Lieder und Tänze, Op. 33: No. 6 in E Minor "Romance"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84e4a1187feac273c45669455e788eeaa78a7a3c4feb8ce9924b55cdcadd344. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGH1730477.
Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": I. Adagio sostenuto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc619ca014b259f7c27960fd960dea9f8b9a9526a9495ce1a273b3150779970d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1730500.
2 Pieces for Violin and Piano, Op. 11: II. Chanson de Berceau in A Major
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Noure and Anitra Suite, Op. 13: No. 7, Berceuse in G-Flat Major
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Kinderszenen, Op. 15: No. 12, Kind im einschlummern (Child Falling Asleep)
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Kinderszenen, Op. 15: No. 7, Träumerei (Dreaming)
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Suite in D Minor, HWV 437: III. Sarabande
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86c978fd9f9839a15ccef8e778f128694e37df2cc093dc8ea5495ccb51d3c22. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGH1730480.
14 Songs, Op. 34: No. 14 in E Minor "Vocalise"
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Kinderszenen, Op. 15: No. 1, Von fremden Ländern und Menschen (Of Foreign Lands & Peoples)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd590f26b2537203c399c6a5a321fb995d54b26134c63647f7e8d87ddfd2a632f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1730515.
Orfeo Ed Euridice: Dance of the Blessed Spirits
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Piano Sonata No. 8 in C Minor, Op. 13 "Pathetique": II. Adagio cantabile
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Piano Sonata in F Major, Hob. XVI:23: II. Adagio
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41Deux Arabesques: No. 1 in E Major, Andantino con moto
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Songs Without Words, Op. 19: No. 6 in G Minor, Venetian Gondola Song
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The Well-Tempered Clavier, Book 1: Prelude No. 1 in C Major, BWV 846
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Piano Sonata No. 16 in C Major, K. 545: II. Andante
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6e9d2213ea28e75ee03886ee1353d8370b8dfe832133a21d9b6b171bab64d2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1730517.
Deux Arabesques, Op. 6: No. 2 in B Minor
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Piano Sonata No. 20 in A Major, D. 959: II. Andantino
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3bceed6639f2246a3b7f65c830c3d5046379a8574d9e0a15b2a32adb6cfe34. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCGH1730506.
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12 Pieces, Op. 40: No. 2, Chanson Triste in G Minor
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Scherzo No. 4 in E Major, Op. 54: Lento (Excerpt)
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Piano Sonata No. 21 in C Major, Op. 53 “Waldstein”: II. Adagio molto
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7 Fantasien, Op. 116: No. 6 in E Major, Intermezzo
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Piano Sonata No. 11 in A Major, K. 331: I. Theme and Variations, Andante grazioso
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24 Preludes, Op. 28: No. 15 in D-Flat Major “Raindrop”
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6 Klavierstücke, Op. 118: No. 2 in A Major, Intermezzo
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Lento (Excerpt)
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3 Gymnopédie: No. 1 in D Major / D Minor: Lent et douloureux
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Concerto nach italiänischen gusto in F Major, BWV 971: III. Presto
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Die Kunst der Fingerfertigkeit, Op. 740: No. 24 in A-Flat Major, Molto vivace con velocità
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Etüden, Op. 32: No. 7 in A Major, Andante con sentimento
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Keyboard Sonata in G Minor, Op. 7 No. 3: I. Allegro con spirito
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Keyboard Sonata in E Major, Hob. XVI:22: I. Allegro moderato
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Keyboard Sonata in B-Flat Major, Op. 30 No. 1: I. Allegro
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Keyboard Sonata in C Minor, Op. 1 No. 2: I. Fièrement
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Zwei Fantasiestücke, Op. 17: No. 2, Hexentanz
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Soirées musicales, Op. 6: No. 3 in G Minor, Mazurka
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3 poetické polky, Op. 8: No. 1 in E-Flat Major, Polka
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Deux morceaux, Op. 10: No. 2 in G Major, Humoresque
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Three Tone Pictures, Op. 5: No. 1, The Lake at Evening
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Cinq danses gitanes, Op. 55: No. 5, Sacro-Monte
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Suite Bergamasque, L 75: III. Clair de Lune
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Visions intérieures: The Developing Song Cycle
Bach, JS: Notebook for Anna Magdalena Bach: No. 25, Aria. "Bist du bei mir", BWV 508 (After Stölzel's Diomedes)
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Grieg: Melodies of the Heart, Op. 5: No. 3, Ich liebe dich
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David Popper: Complete Transcriptions for Violoncello & Piano
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Röntgen, Maier, Hägg & Others: Piano Works
A Matthay Miscellany: Rare and Unissued Recordings by Tobias Matthay and His Pupils
Jensen: Eroticon - Reubke: Scherzo - Schumann: Kreisleriana
Stilwandlungen des Klavierliedes: 1850-1950
In the Mood for Energy & Power, Vol. 1: Charpentier, Mozart, Chopin, Gottschalk, Rimsky-Korsakov, Rachmaninoff... (Classical Piano Hits)
Vocal Recital: Kowalski, Jochen - / Martini, J.-P.-G. / Perez-Freire, O. / Eulenburg, P.
A Tribute to Cyprus (World Premiere Recording)