Jörgen van Rijen (born 20 February 1975, Dordrecht) is Principal Trombone (jointly with Bart Claessens) at the Royal Concertgebouw Orchestra (RCO) in Amsterdam. He is also a founding member of the Dut
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 0xf039ed88438a8279f3565693bb6a0ebad94d1b745b6941d0a9616941dd1e737b. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc9be5d5-be4b-43dc-adb0-52ae26b4917f.json and https://artists.proofprofile.net/proofs/artist/dc9be5d5-be4b-43dc-adb0-52ae26b4917f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sackbutt: Trombone in the 17th and 18th Century
Trombone Concerto in B-Flat Major: I. Allegro moderato
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Trombone Concerto in B-Flat Major: II. Andante
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Trombone Concerto in B-Flat Major: III. Finale. Allegro moderato
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Sonate concertate in stil moderno, libro 1: Sonata No. 4 a doi sopran e trombon overo violeta. Alegra - Presto - Adagio - Alegro
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Trombone Concerto in D Major: I. Allegro
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Trombone Concerto in D Major: II. Adagio
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Trombone Concerto in E-Flat Major: I. Con discretione. Quasi andante
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Stravinsky: The Soldier's Tale (English version), Élégie. Duo concertant
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Stravinsky: Histoire du soldat (version française), Élégie, Duo concertant
Histoire du soldat, Partie I Scène I: Marche du soldat. Airs de marche
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Stravinsky: Die Geschichte vom Soldaten (Deutsche Fassung). Élégie. Duo concertant
Die Geschichte vom Soldaten, 1 Teil 1 Szene: Marsch des Soldaten. Marschmelodie
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I Saw My Lady Weep (Arr. N. Muhly for Chamber Ensemble)
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Gnossienne No. 1 (Arr. J. van Rijen for Chamber Ensemble)
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MacMillan, Verbey & Berio: Trombone Concertos (Live)
Kalevi Aho: Trombone & Trumpet Concertos
Fratres (Arr. for Trombone, String Ensemble & Percussion)
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Keyboard Concerto in D Minor, BWV 974 (After A. Marcello's S.Z799) [Arr. J. van Rijen]: I. Andante
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Keyboard Concerto in D Minor, BWV 974 (After A. Marcello's S.Z799) [Arr. J. van Rijen]: II. Adagio
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Keyboard Concerto in D Minor, BWV 974 (After A. Marcello's S.Z799) [Arr. J. van Rijen]: III. Presto
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Vater unser (Arr. for Trombone & String Ensemble)
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Keyboard Concerto in D Major, BWV 972 (After A. Vivaldi's RV 230) [Arr. J. van Rijen]: I. Allegro
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Keyboard Concerto in D Major, BWV 972 (After A. Vivaldi's RV 230) [Arr. J. van Rijen]: II. Larghetto
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Keyboard Concerto in D Major, BWV 972 (After A. Vivaldi's RV 230) [Arr. J. van Rijen]: III. Allegro
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An den Wassern zu Babel saßen wir und weinten (Arr. for Trombone & String Ensemble)
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Keyboard Concerto in C Minor, BWV 981 (After B. Marcello's S.C788) [Arr. J. van Rijen]: I. Adagio
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Keyboard Concerto in C Minor, BWV 981 (After B. Marcello's S.C788) [Arr. J. van Rijen]: II. Vivace
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Keyboard Concerto in C Minor, BWV 981 (After B. Marcello's S.C788) [Arr. J. van Rijen]: III. Adagio
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Keyboard Concerto in C Minor, BWV 981 (After B. Marcello's S.C788) [Arr. J. van Rijen]: IV. Prestissimo
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Pari intervallo (Version for Clarinet, Trombone & String Ensemble)
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Il Flaminio, Act I: No. 1. Canzonetta, "Mentre l'erbetta pasce l'agnella". Andante (Arr. for Brass Ensemble by Steven Verhelst)
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Arie Antiche, Volume I: No. 22. Se tu m'ami (Arr. for Brass Ensemble by Steven Verhelst)
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Pausanius, Z. 585 "The Betrayer of his Country": No. 2. My Dearest, My Fairest (Arr. with Trumpet, Trombone, Cello and Theorbo by Wim van Hasselt and Jörgen van Rijen)
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Timon of Athens, Z. 632: No. 2. Duet, "Hark! how the songsters of the grove" (Arr. with Trumpet, Trombone, Two Recorders, Cello, Theorbo and Organ by Wim van Hasselt and Jörgen van Rijen)
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Trio for Trumpet, Trombone and Piano: I. Moderato
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Aria et polonaise, Op. 128 (Moderato - Tempo moderato)
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Morceau symphonique. Lent, grave - Allegro moderato
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Piece for Trombone and Piano in E-Flat Minor. Lento - Allegro
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Trombone Concerto: I. Andante et scherzo - Tempo di Valse
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Trombone Concerto: II. Nocturne. Andante
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Trombone Concerto: III. Tambourin. Allegro giocoso
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Channel Classics 30 Years - Gramophone Editor's Choices
Divertimento in E-Flat Major, Hob. IV:5: I. Moderato assai - II. Allegro di molto
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T-Bone Concerto Mvt. II Medium (feat. Jörgen van Rijen - Trombone)
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T-Bone Concerto Mvt. III Well Done (feat. Jörgen van Rijen - Trombone)
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Fanny Lye Deliver'd (Original Motion Picture Soundtrack)
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Genzmer: Piano Concerto No. 1, Cello Concerto & Trombone Concerto
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Brade, G. Gabrieli & Scheidt: Tuba mirum