MDR Rundfunkchor is the radio choir of the German broadcaster Mitteldeutscher Rundfunk (MDR), based in Leipzig, Saxony. Dating back to 1924, the choir became the radio choir of a predecessor of the MD
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7d8cf2c74eb2e513581e4f13d241c4ebfd46521116e456f0cba8b04b519777. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc3a3a19-fb0f-40eb-9b6a-49edd637d731.json and https://artists.proofprofile.net/proofs/artist/cc3a3a19-fb0f-40eb-9b6a-49edd637d731.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8138600ba09a9367bbb902628d9e85aec2d3994b8fbdfb7058bd96ffac60f808. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBBA0901290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ef1c8e8dcb99820484f0707b1f978e99813d99d58f24c84e1ffb061969ab97. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBBA0901300.
Symphony No. 9 in D Minor, Op. 125 "Choral": I. Allegro ma non troppo, un poco maestoso
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Symphony No. 9 in D Minor, Op. 125 "Choral": II. Molto vivace
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Symphony No. 9 in D Minor, Op. 125 "Choral": III. Adagio molto e cantabile
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Symphony No. 9 in D Minor, Op. 125 "Choral": IV. Presto - Allegro ma non troppo
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Suite bergamasque, L. 75: III. Clair de lune (Arr. A. Caplet)
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Berceuse héroïque, L. 132 (Version for Orchestra)
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Schoenberg: Gurre-Lieder (Live at Semperoper, Dresden)
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. Allegro energico, sempre ben marcato (Excerpt)
Vaughan Williams: Symphony No. 1 "A Sea Symphony" & Serenade to Music (Live)
Symphony No. 1 "A Sea Symphony": I. A Song for All Seas, All Ships (Live)
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Christmas Songs from Germany & All Over the World, Vol. 2
Beethoven: Missa solemnis, Op. 123 (Live)
Confessions of Faith: Choral Concertos by Bortniansky & Schnittke
Weihnachtslieder aus Deutschland und aller Welt
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Symphony No. 9 in D Minor, Op. 125: I. Allegro, ma non troppo, un poco maestoso
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Symphony No. 5 in C Minor, Op. 67: II. Andante con moto
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Symphony No. 3 in E-Flat Major, Op. 55 "Eroica": III. Scherzo. Allegro vivace
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Symphony No. 5 in C Minor, Op. 67: III. Scherzo. Allegro
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Symphony No. 7 in A Major, Op. 92: III. Presto
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Symphony No. 9 in D Minor, Op. 125: III. Adagio molto e cantabile
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Symphony No. 5 in C Minor, Op. 67: IV. Allegro
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Symphony No. 6 in F Major, Op. 68 "Pastoral": I. Awakening of Cheerful Feelings upon Arrival in the Country. Allegro ma non troppo
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Symphony No. 2 in D Major, Op. 36: II. Larghetto
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Symphony No. 6 in F Major, Op. 68 "Pastoral": II. Scene by the Brook. Andante molto mosso
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Symphony No. 2 in D Major, Op. 36: III. Scherzo. Allegro
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Symphony No. 6 in F Major, Op. 68 "Pastoral": III. Merry Gathering of Country Folk. Allegro
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12 Audiobiographies of Great Composers By Jörg Handstein (in German)
Brahms: Ein deutsches Requiem (A German Requiem)
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Dir, Seele des Weltalls, K.429: 1. "Dir, Seele des Weltalls"
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Laut verkünde unsre Freude, K.623: 1. Coro - Recitativo: "Laut verkünde unsre Freude"
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Laut verkünde unsre Freude, K.623: 5. Allegro: "Laut verkünde unsre Freude"
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Beethoven: Piano Concerto No.5 in E flat major Op.73 -"Emperor": 2. Adagio un poco mosso
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Beethoven: Rage Over A Lost Penny, Op.129
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Beethoven: Piano Sonata No.14 In C Sharp Minor, Op.27 No.2 -"Moonlight": 1. Adagio sostenuto
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Beethoven: Symphony No.7 in A, Op.92: 2. Allegretto
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Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": 2. Molto vivace
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Beethoven: Minuet in G Major, WoO 10, No.2
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Beethoven: Symphony No.5 in C minor, Op.67: 1. Allegro con brio
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Beethoven: Piano Sonata No. 29 in B-Flat Major, Op. 106 "Hammerklavier": 1. Allegro
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Beethoven: Violin Romance No.2 in F major, Op.50 - Live at Muziekcentrum, Enschede, 1997 / Applause Removed
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Beethoven: Piano Sonata No.8 in C minor, Op.13 -"Pathétique": 2. Adagio cantabile
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Symphony No. 3 in E-Flat Major, Op. 55 "Eroica": I. 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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Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
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Symphony No. 1 in C Major, Op. 21: III. Menuetto. Allegro molto e vivace
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Symphony No. 1 in C Major, Op. 21: IV. Finale. Adagio – Allegro molto e vivace
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Symphony No. 3 in E-Flat Major, Op. 55 "Eroica": IV. Finale. Allegro molto
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Symphony No. 5 in C Minor, Op. 67: III. Allegro
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Symphony No. 2 in D Major, Op. 36: I. Adagio molto – Allegro con brio
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Symphony No. 4 in B-Flat Major, Op. 60: II. Adagio
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Symphony No. 8 in F Major, Op. 93: I. Allegro vivace e con brio
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Symphony No. 6 in F Major, Op. 68 "Pastoral": III. Lustiges Zusammensein der Landleute. Allegro
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Symphony No. 2 in D Major, Op. 36: IV. Allegro molto
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Symphony No. 4 in B-Flat Major, Op. 60: IV. Allegro ma non troppo
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Symphony No. 8 in F Major, Op. 93: III. Tempo di menuetto
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Symphony No. 6 in F Major, Op. 68 "Pastoral": IV. Gewitter, Sturm. Allegro
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Chorszenen und Konzertchöre in Rundfunkaufnahmen ab 1938
Die Meistersinger von Nürnberg, WWV 96: Silentium! Silentium!
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Sandström: High Mass / Lidholm: Kontakion
Mozart: Complete Edition Vol.11: Vespers, Oratorios etc
Litaniae de venerabili altaris sacramento in B flat, K.125: 1. Kyrie eleison
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Litaniae de venerabili altaris sacramento in E flat, K.243: 1. Kyrie eleison
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Litaniae Lauretanae BMV in D, K.195: 2. Sancta Maria
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Brahms: Symphony No.4; Alto Rhapsody; Nanie
Symphony No. 4 in E minor, Op. 98: 1. Allegro non troppo
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Rhapsody for Alto, Chorus, and Orchestra, Op. 53
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Mendelssohn: Elias, Op. 70, MWV A25, Pt. 2: No. 28, Terzett. "Hebe deine Augen auf zu den Bergen"
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Symphony No. 1 in F Minor, Op. 10: I. Allegretto - Allegro non troppo
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Symphony No. 1 in F Minor, Op. 10: II. Allegro
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Symphony No. 1 in F Minor, Op. 10: III. Lento
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Symphony No. 1 in F Minor, Op. 10: IV. Allegro molto - Lento - Allegro molto - Presto
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Symphony No. 2 in B Major, Op. 14, "To October": Part I
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Symphony No. 2 in B Major, Op. 14, "To October": Part III
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Symphony No. 3 in E-Flat Major, Op. 20, "The First of May": I. Allegretto
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Symphony No. 3 in E-Flat Major, Op. 20, "The First of May": II. Andante
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Symphony No. 3 in E-Flat Major, Op. 20, "The First of May": III. Allegro
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Symphony No. 3 in E-Flat Major, Op. 20, "The First of May": V. Moderato
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Mendelssohn: Symphony No. 2, Op. 52 "Lobgesang"
Mendelssohn: Symphony No. 2 in B-Flat Major, Op. 52, MWV A18 "Lobgesang": II. (a) Allegro maestoso. "Alles, was Odem hat, lobe den Herrn!"
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Mendelssohn: Symphony No. 2 in B-Flat Major, Op. 52, MWV A18 "Lobgesang": VII. Allegro maestoso e molto vivace. "Die Nacht ist vergangen"
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Mendelssohn: The Symphonies, The Piano Concertos, Capriccio Brillant & A Midsummer Night's Dream
Mendelssohn: Edition Vol. 1. Symphonies Nos. 1 - 5, Violin & Piano Concertos
Mozart: The Masonic Music / Litanies (Complete Mozart Edition)
Mendelssohn: Symphony No. 2, "Lobgesang"
Gurre-Lieder, Pt. 3: No. 9, Seht die Sonne farbenfroh am Himmelssaum (Live)
Gurre-Lieder, Pt. 3: No. 9, Seht die Sonne farbenfroh am Himmelssaum - Live
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