Martin Haselböck (born 23 November 1954, Vienna, Austria) is the Austrian musical director of Musica Angelica in Long Beach, California, United States, and the musical director and founder of the Orch
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 0x25e9ef605049644b0c2c3aac64a5d4baefe2404155820bdbf1090f61f73ad664. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76b02cf8-bd8e-44f5-a323-12e3e23990f3.json and https://artists.proofprofile.net/proofs/artist/76b02cf8-bd8e-44f5-a323-12e3e23990f3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x110902b5e76b2c2f10e4c55d767b6f7500d94b46b4e40cff69ff672c3842520a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATPD50900131 — a six-check JSON result.
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Winterreise, Op. 89, D. 911: No. 5. Der Lindenbaum
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Ellens Gesang III (Ave Maria!), Op. 56, No. 6, D. 839, "Hymne an die Jungfrau"
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Beethoven: Violin Concerto, Andante cantabile
Violin Concerto in D Major, Op. 61: I. Allegro ma non troppo
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Beethoven: Symphonies 5 & 6 "Pastoral" (Resound Collection, Vol. 8)
Beethoven: Symphony No. 4 & Piano Concerto No. 4 (Resound Collection, Vol. 7)
Piano Concerto No. 4 in G Major, Op. 58: I. Allegro moderato
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Liszt: The Sound of Weimar – Die Orchesterwerke im Originalklang
Beethoven: Symphony No. 8 & Concerto for Piano after the Violin Concerto (Resound Collection, Vol. 6)
Symphony No. 8 in F Major, Op. 93: I. Allegro vivace e con brio
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Symphony No. 8 in F Major, Op. 93: II. Allegretto scherzando
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Symphony No. 8 in F Major, Op. 93: III. Tempo di Menuetto
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Symphony No. 8 in F Major, Op. 93: IV. Allegro vivace
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Beethoven: Symphony No. 9 in D Minor, Op. 125 (Resound Collection, Vol. 5)
Symphony No. 9 in D Minor, Op. 125: I. Allegro ma non troppo, un poco maestoso
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Symphony No. 9 in D Minor, Op. 125: II. Scherzo (Molto vivace - Presto)
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Symphony No. 9 in D Minor, Op. 125: III. Adagio molto e cantabile
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Beethoven: Symphony No. 3 "Eroica" & Septet (Resound Collection, Vol. 4)
Symphony No. 3 in E-Flat Major, Op. 55 "Eroica": I. Allegro con brio
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Septet in E-Flat Major, Op. 20: I. Adagio - Allegro con brio
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Symphony No. 3 in E-Flat Major, Op. 55, "Eroica": II. Marcia funebre (Adagio assai)
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Septet in E-Flat Major, Op. 20: II. Adagio cantabile
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Symphony No. 3 in E-Flat Major, Op. 55, "Eroica": III. Scherzo - Trio (Allegro vivace)
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Septet in E-Flat Major, Op. 20: III. Tempo di menuetto
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Symphony No. 3 in E-Flat Major, Op. 55, "Eroica": IV. Finale (Allegro molto)
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Septet in E-Flat Major, Op. 20: IV. Tema con variazioni (Andante)
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Septet in E-Flat Major, Op. 20: VI. Andante con moto alla marcia - Presto
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Beethoven: Egmont (Resound Collection, Vol. 3)
Egmont, Op. 84: I. Ouvertüre. Sostenuto, ma non troppo - Allegro
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Beethoven: Symphony 7 & Wellington's Victory (Resound Collection, Vol. 2)
Symphony No. 7 in A Major, Op. 92: II. Allegretto in A Minor
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Wellington's Victory or the Battle of Vittoria, Pt. 1, Op. 91: Battle
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The Sound of Weimar. Schubert - Liszt Transcriptions
Beethoven: Symphonies 1 & 2 (Resound Collection)
Haydn: Symphonies Nos. 6-8, Le Matin - Le Midi - Le Soir
W.F. Bach, C.P.E. Bach & Hofmann: Flute Concertos
Joseph I / Ferdinand Iii / Leopold I: Sacred Works
Graun: Violin Concertos / Viola Da Gamba Concerto
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6 Lieder, Op. 50: No. 2. Der Jager Abschied
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5 Humoresken, Op. 84: No. 3. Das war das Kloster Grabow
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Winterreise, Op. 89, D. 911: No. 5. Der Lindenbaum (arr. for choir)
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Vesperae solennes de confessore, K. 339: Laudate Dominum
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3 Motets, Op. 39: No. 2. O praise the Lord (Laudate pueri)
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6 Songs, Op. 48: No. 4. Die Himmel ruhmen (arr. for male choir)
Carl Maria von Weber Men's Choir, Berlin
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Deutsche Messe, D. 872: Zum Eingang: Wohin soll ich mich wenden
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Ave Maria, Op. 533: Nun ist der laute Tag verhallt
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Classic Moods - Mozart, W.A. / Silcher, F. / Schubert, F. / Mendelssohn, Felix / Haydn, F.J. / Bruckner, A. / Brahms, J. / Bruch, M.
Classic Moods - Pergolesi, G.B. / Bach, J.S. / Handel, G.F. / Bach, C.P.E. / Mozart, W.A. / Haydn, F.J. / Donizetti, G. / Mendelssohn, Felix
Wolfgang Amadeus Mozart: Schatten ung licht: Chapter 1: Wunder der Natur (1756-1765)
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Wolfgang Amadeus Mozart: Schatten ung licht: Chapter 4: Im Tanzmeisterhaus (1773-1777)
Camerata Academica des Mozarteum Salzburg
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Wolfgang Amadeus Mozart: Schatten ung licht: Chapter 2: Salzburgs Glanz und Wolfgangs Gloria (1765-1769)
Südwestdeutsches Kammerorchester Pforzheim
Carl Philipp Emanuel Bach Chamber Orchestra
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Wolfgang Amadeus Mozart: Schatten ung licht: Chapter 5: Fort mir dir nach Paris! (1777-1779)
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Wolfgang Amadeus Mozart: Schatten ung licht: Chapter 3: Cavaliere Amadeo Wolfgango (1770-1773)
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Trumpet Sonata in D Major, Z. 850: I. Allegro
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Trumpet Sonata in D Major, Z. 850: II. Adagio
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Jongen: Symphonie concertante, Passacaglie et gigue & Sonata eroïca
Symphonie concertante, Op. 81: I. Allegro molto, moderato
Deutsche Radio Philharmonie Saarbrücken-Kaiserslautern
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Symphonie concertante, Op. 81: II. Divertimento: Molto vivo
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Symphonie concertante, Op. 81: III. Molto Lento: Lento misterioso
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Symphonie concertante, Op. 81: IV. Toccata (Moto perpetuo): Allegro moderato
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Die Orgeln Von Gottfried Silbermann Vol. 1 - Freiberg, Tiefenau, Niederschöna, Grohartmannsdorf
Schubert, F.: Mass No. 5 in A-Flat Major, D. 678 / Offertory: Intende Voci, D. 963
Church Sonata No. 1 in E-Flat Major, K. 67, "Epistle Sonata"
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Bruckner, A.: Symphony No. 1 (1866 Version)
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Choral Music - Bortniansky, D. / Schubert, F. / Bruckner, A. / Bruch, M. / Mendelssohn, Felix / Silcher, F. / Rheinberger, J.G.
Choral Music (Sacred) - Schubert, F. / Brahms, J. / Mendelssohn, Felix / Verdi, G. / Monteverdi, C. / Bruckner, A. / Mozart, W.A. / Grieg, E.
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