Jörg Widmann (; born 19 June 1973) is a German composer, conductor and clarinetist. In 2023, Widmann was the third most performed living contemporary composer in the world. Formerly a clarinet and com
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 0x1b905a3aa03e115c35c68070cf16bf0612941acc5221c57fbfaa2133681c83fe. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78c9203c-5e01-40fa-b76f-369fc4b68a64.json and https://artists.proofprofile.net/proofs/artist/78c9203c-5e01-40fa-b76f-369fc4b68a64.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Weber: Clarinet Quintet, Concertino for Clarinet, Grand Duo Concertant & Der Freischütz Overture
Concertino in E-Flat Major, Op. 26: I. Adagio ma non troppo
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 0x90d4f826b06f730fd214b6b18c0f66d79b521ccd4ed2abe892c4b2947dd7f53e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR50X1963701.
Oboe Concerto in C Major, Hob. VIIg:C1: I. Allegro spiritoso - Arr. for Flugelhorn in D Major by Sergei Nakariakov
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fff6c39c18fac35f89b49d6ef76a79327e95a90bf311876f6c34b5dca0a407. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBL62300062.
Oboe Concerto in C Major, Hob. VIIg:C1: III. Rondo. Allegretto - Arr. for Flugelhorn in D Major by Sergei Nakariakov
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4bc2cea82b90b0ce90a6364d45642df6310d0733b586644485c5fd5bfd997. 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/DEBL62300064.
Pierre Boulez: Anthèmes & Dialogue de l'ombre double
Sonata for Clarinet and Piano No. 2 in E Flat Major, Op. 120 No. 2: 1. Allegro amabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38581a6f0c1fed846d05e2f5b23e6a63f3cebb889b18de0de287a520a021d3a. 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/DEB331862101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b5916016cde06efae8b60defc8aeb43496ba2d3c9a725380b47274268bcff8. 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/DEB331862104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e8419f728f44e0f4cdd7f0ff3abafc85a56f36355172198c313d1f86bdb345. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEB331862105.
Intermezzi for Piano: 3. Mit dunkler Glut (Agitato sempre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1dfebb2fd180255cd2b7a781a4d44c63f454da42c352b051af719b2c9be9e1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331862106.
Sonata for Clarinet and Piano No. 1 in F Minor, Op. 120 No. 1: 2. Andante un poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0706b222ca6079e51722566ab82afb976f1597509a53fc4391b6093358d452. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEB331862110.
Messiaen: Quatuor pour la fin du temps, I/22 (Live)
Jörg Widmann: Arche (Live at Elbphilharmonie, Hamburg / 2017)
Jörg Widmann: Drittes Labyrinth | Polyphone Schatten
Mendelssohn: Symphony No. 3 in A Minor "Scottish" & The Hebrides - Jörg Widmann: 180 Beats per Minute & Fantasie
Viola Concerto: I. Pizzicato, Molto rubato - Più mosso
Symphonieorchester des Bayerischen Rundfunks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8b106c1cf4079cb22c4c83245d963b500dde5efabd62c9fbf8f8298c89a216. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR7JM1756010.
Once Upon a Time… Fairy Tales by Robert Schumann & Jörg Widmann
Märchenerzählungen, Op. 132: I. Lebhaft, nicht zu schnell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708b99cdb7563bd99f1bf386e5750a0e1f4eafc336185b4184e0db72c02316f4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DELN21701001.
Märchenerzählungen, Op. 132: III. Ruhiges Tempo mit zartem Ausdruck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b72558b9786914c83f25fc4487595389f2e5e423e08ec211a5978375aa39a7. 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/DELN21701003.
Mendelssohn: Symphony No. 5 in D Major, Op. 107, MWV N 15 "Reformation"
Mozart: Clarinet Concerto, K. 622 - Weber: Clarinet Concerto No. 1 - Widmann: Drei Schattentänze
Mozart: Clarinet Quintet; String Quartet No. 15
Clarinet Quintet in A Major, K. 581: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359811d51929ceef8b3cb95782695f2d06e2de5341059991031423e0dbf10a4d. 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/FRZ141302010.
Clarinet Quintet in A Major, K. 581: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8b63b6ed348b2a3c466dee0edddcef12ca624d506b7eb1518448016c9425cb. 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/FRZ141302020.
Clarinet Quintet in A Major, K. 581: III. Menuetto - Trio I - Trio II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbba14fed95c145c2a6f0a7093b934276b44b5a3d9ac0338378535356a8a9b0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ141302030.
Clarinet Quintet in A Major, K. 581: IV. Allegretto con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abc3b241771f32cddc36078b0cb1c8c3a3aeef0f3dc3c725e94eea45fbaeeef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ141302040.
String Quartet No.15 in D Minor, K. 421: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c1df998365258e201e5e0359ea69ed6e1491ec8c3969532d8c28ebf1bda731. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ141302050.
String Quartet No.15 in D Minor, K. 421: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96da8d5a526a6892524e3864e00aeb39239109b59cfc1fb10ab23f25fbbe4a88. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ141302060.
String Quartet No.15 in D Minor, K. 421: III. Menuetto - Trio (Allegretto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ec872b73d0110758da318a7920a412d5d0a286e47de81d46cb7e4a208776f7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRZ141302070.
String Quartet No.15 in D Minor, K. 421: IV. Allegretto ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e489f39e9f4efcd404556c9b72db686d9a107363b6988de8ec0f0c8c23c82de. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRZ141302080.
Widmann: Violin Concerto - Antiphon - Insel der Sirenen
Dvořák: String Sextet in A Major, Op. 48 / Schumann: 5 Stücke im Volkston, Op. 102; Fantasiestücke, Op. 73 / Reimann: Solo for Clarinet (Live)
Schubert: Octet in F Major, D. 803 / Widmann: Octet in F Major
Reimann, A.: Cantus / Ollea / Solo for Clarinet / … Ni Una Sombra / Arietta
Rihm: 4 Studien zu einem Klarinettenquintett - 4 Male
Mozart: Clarinet Quintet, K. 581: II. Larghetto
Beethoven: Violin Concerto, III. Rondo. Allegro
Brahms: Sonata for Clarinet and Piano No. 1 in F Minor, Op. 120 No. 1: 4. Vivace
Brahms: Sonata for Clarinet and Piano No. 2 in E Flat Major, Op. 120 No. 2: 3. Andante con moto - Allegro
Widmann: Arche: 5. Dona nobis pacem (Live at Elbphilharmonie, Hamburg / 2017)