210px|thumb|Hans Pfitzner, c. 1910 Hans Erich Pfitzner (5 May 1869 – 22 May 1949) was a German composer, conductor and polemicist who was a self-described anti-modernist. His best known work is the p
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 0x51d910442ca9d36c7e1f4fa54eb15fb21e67fce4cf3073e59e2728df4734b5c9. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44b2f5e6-7f7b-4127-986f-e65db0742d85.json and https://artists.proofprofile.net/proofs/artist/44b2f5e6-7f7b-4127-986f-e65db0742d85.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pfitzner: Piano Quintet in C Major, Op. 23 & Sextet in G Minor, Op. 55
Mozart, Weber, Mendelssohn, Lortzing & Lanner: Le nozze di Figaro, K. 492-Cosi fan tutte, ossia La scuola degli amanti, K. 588-Der Freischütz, OP. 77-Preciosa, OP. 78-Oberon, J. 306-Jubel-Ouv
Pfitzner & Braunfels: Piano Concertos (Hyperion Romantic Piano Concerto 79)
Pfitzner: Piano Quintet in C Major, Op. 23
Pfitzner: Von deutscher Seele, Op. 28 (Live)
Pfitzner: Symphony in C-Sharp Minor Op. 36a
Pfitzner: Palestrina, WoO 17 (Bayerische Staatsoper Live)
Pfitzner: Palestrina, WoO 17 & Vorspiele
Pfitzner: Das Christ-Elflein, Op. 20 (Orfeo d'Or)
Pfitzner: Cello Concertos (Hyperion Romantic Cello Concerto 4)
Pfitzner, H.: Piano Quintet, Op. 23 / Sextet, Op. 55
Hans Pfitzner dirigiert Beethoven 6.& 8. Sinfonie
Hans Pfitzner dirigiert Beethoven 1. & 4. Sinfonie
Pfitzner, H.: Christ-Elflein (Das) [Opera]
Pfitzner: Complete Piano Works & Violin Sonata in E Minor, Op. 27
Pfitzner, H.: Arme Heinrich (Der) [Opera]
Pfitzner: Piano Trio in F Major, Op. 8 & Piano Trio in B-Flat Major
Pfitzner: Lieder (Complete Edition, Vol. 2)
Beethoven: Symphonies Nos. 1 and 6 (Pfitzner) (1928-1930)
Beethoven: Symphonies Nos. 2 and 4 (Kleiber / Pfitzner) (1928-1929)
Palestrina - Musical Legend In Three Acts: Prelude to Act I. Ruhig (Andante)
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 0xdbe9b4504df735056f760b9403c39151d1d841a7ae377052ef25129c36cfe2a9. 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/DEF057330401.
Palestrina - Musical Legend In Three Acts / Act 1: Schönste, ungnäd'ge Dame
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Debussy: 3 Chansons de France, CD 115, L. 102: No. 3, Rondel. "Pour ce que Plaisance est morte"
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Debussy: 3 Chansons de France, CD 115, L. 102: No. 1, Rondel. "Le temps a laissé son manteau"
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Milhaud: Poèmes juifs, Op. 34: No. 8, Lamentation
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Mahler: Des Knaben Wunderhorn: No. 9, Wo die schönen Trompeten blasen (Version for Voice and Piano)
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Schoeck: 8 Lieder, Op. 17: No. 4, Ein Irrsal kam in die Mondscheingärten
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Pfitzner: 4 Lieder, Op. 32: No. 1, Hussens Kerker
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Reutter: Ehrler-Zyklus I, Op. 64: No. 5, Johann Kepler
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Fortner: 4 Gesänge nach Worten von Hölderlin: No. 3, Abbitte
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Fortner: 4 Gesänge nach Worten von Hölderlin: No. 2, Hyperions Schicksalslied
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Bartók: 5 Lieder, Op. 15, Sz. 61: No. 5, Im Tale
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Blacher: Aprèslude, Op. 57: No. 1, Gedicht
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Blacher: Aprèslude, Op. 57: No. 2, Worte
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Fortner: Lieder nach Texten von William Shakespeare: No. 5, Lied vom Weidenbaum
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Reutter: Meine dunklen Hände: No. 4, Lied für ein dunkles Mädchen
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Reutter: Meine dunklen Hände: No. 2, Trommel
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Hans Pfitzner: Michael Raucheisen Vol. 19 & 20
Schubert: Schwanengesang, D. 957: No. 4, Ständchen
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Schubert: Schwanengesang, D. 957: No. 7, Abschied
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Schubert: Schwanengesang, D. 957: No. 8, Der Atlas
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Schubert: Schwanengesang, D. 957: No. 14, Die Taubenpost
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Fauré: 2 Mélodies, Op. 46: No. 2, Clair de lune
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Schumann: Liederkreis, Op. 39: No. 1, In der Fremde
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Schumann: Liederkreis, Op. 39: No. 7, Auf einer Burg
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Schubert: Die schöne Müllerin, Op. 25, D. 795: No. 1, Das Wandern
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Verdi: Don Carlos, Act 1: "Gott, der entflammte der Liebe heiße Glut" (Posa, Don Carlos)
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Beethoven: An die ferne Geliebte, Op. 98: No. 1, Auf dem Hügel sitz'ich, spähend
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Strauss II, J: Der Zigeunerbaron, Act 2: Werberlied. "Her die Hand" (Homonay, Chor)
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Grieg: Melodien des Herzens, Op. 5: No. 2, Des Dichters Herz
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Grieg: Melodien des Herzens, Op. 5: No. 4, Mein Sinn ist wie der mächt'ge Fels
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Hahn: 7 Chansons grises: No. 5, L'heure exquise
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Mendelssohn: Paulus, Op. 36, MWV A14, Pt. 1: No. 17, Arie. "Gott sei mir gnädig nach deiner Güte"
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Mendelssohn: Paulus, Op. 36, MWV A14, Pt. 1: No. 19, Arie mit Chor. "Ich danke dir, Herr mein Gott"
Chor des Städtischen Musikvereins zu Düsseldorf
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Haydn: Canzonettas, Book I: No. 2, Recollection, Hob. XXVIa:26
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Haydn: Canzonettas, Book II: No. 1, Sailor's Song, Hob. XXVIa:31
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Schubert: Winterreise, Op. 89, D. 911: No. 5, Der Lindenbaum
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Schubert: Winterreise, Op. 89, D. 911: No. 15, Die Krähe
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Puccini: Madame Butterfly, Act 3: "Leb' wohl, mein Blütenreich!" (Pinkerton, Sharpless)
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Kirchner: 10 Lieder, Op. 1: No. 9, Frühlingsgedränge
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Brahms: 49 Deutsche Volkslieder, WoO 33: No. 10, Es ritt ein Ritter
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Brahms: 49 Deutsche Volkslieder, WoO 33: No. 13, Wach' auf, mein Hort
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Mozart: Le nozze di Figaro, K. 492, Act 3: "Hai già vinta la causa!" - "Vedrò, mentr'io sospiro" (Conte)
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Bach, JS: Amore traditore, BWV 203: No. 3, Aria. "Chi in amore ha nemica la sorte"
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Chausson: Poème de l'amour et de la mer, Op. 19: III. (b) Le temps des lilas
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Mahler: Kindertotenlieder: No. 1, Nun will die Sonn' so hell aufgeh'n
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Purcell: King Arthur, Z. 628, Act 2: Duet. "Shepherd, Shepherd, Leave Decoying"
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Schumann: Dichterliebe, Op. 48: No. 1, Im wunderschönen Monat Mai
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Schumann: Dichterliebe, Op. 48: No. 6, Im Rhein, im heiligen Strome
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Nicolai: Die lustigen Weiber von Windsor, Act 2: Duett. "In einem Waschkorb?" (Herr Fluth, Falstaff)
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Wolf: Eichendorff-Lieder: No. 11, Lieber alles
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Wagner: Tannhäuser, Act 3: "Wie Todesahnung" - "O du, mein holder Abendstern" (Wolfram)
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Schubert: Die Götter Griechenlands, D. 677
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Schubert: Du bist die Ruh, Op. 59 No. 3, D. 776
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Brahms: 15 Romances from Tieck's "Die schöne Magelone", Op. 33: No. 5, So willst du des Armen
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Brahms: 15 Romances from Tieck's "Die schöne Magelone", Op. 33: No. 6, Wie soll ich die Freude
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Mahler: Lieder eines fahrenden Gesellen: No. 4, Die zwei blauen Augen
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Chausson: 7 Mélodies, Op. 2: No. 3, Les papillons
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Strauss, R: 4 Lieder, Op. 27: No. 4, Morgen!
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Cornelius: Trauer und Trost, Op. 3: No. 2, Angedenken
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Couperin, F: Première leçon de ténèbres pour le Mercredi saint: IV. Ghimel
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