Hartmut Rohde (born 28 April 1966 in Hildesheim) is a German violist. He teaches at the Berlin University of the Arts. External links hartmut-rohde.de - Official website biography at udk biography
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 0x7f8a28a384c8428e481112abeb9e3edec3c9014b6674ddfa9ffceb1ec6cbba72. 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/478f335f-3af4-491a-ad06-d871bc4879a4.json and https://artists.proofprofile.net/proofs/artist/478f335f-3af4-491a-ad06-d871bc4879a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lars Vogt & Friends Live in Heimbach, Vol. 1: Haydn, Mozart, Brahms, Schumann & Berg
Hoffmeister/Telemann/Hindemith/J.C. Bach: Viola Concertos
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 0xb3a985d0908904d760dcfbecfc89170156549214fa4ba1a6c29122a4ecd705b0. 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/DEP629601555.
Forsyth: Viola Concerto - Martin: Ballade pour alto, orchestre à vent, clavecin et harpe - Bruch: Romanze für Viola und Orchester
Viola Concerto in G Minor: I. Appassionato - Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f1f27ba8a68f3b01f7feaf3b972bf240ed28e3d6be4a15ab5e04e2ea8b97e5. 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/BGA471500171.
Viola Concerto in G Minor: II. Andante un poco sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c219b36b82498fd03959693ff0f7b9b3acf0e2c16b926fa4afdae47ca3c4b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BGA471500172.
Viola Concerto in G Minor: III. Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84caa296d02c1e26af3d7e45ac83a5383ba5f5500b9ed86540ac9c1a3b8d7bb4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BGA471500173.
Ballade pour alto, orchestre à vent, clavecin et harpe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214c5c92dccc34df018024a4d34ac20d632bd497cc49c1baf2a35288f45b57ba. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BGA471500174.
Romanze für Viola und Orchester in F-Dur, Op. 85
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e608878cc2ce52a34874e8e9a8f06f4005c42dc6b55f72335b9e1fb33fcee90. 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/BGA471500175.
Bruckner: String Quintet in F Major & String Quartet in C Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf453ec64997ae069db59b1ec27b1f839023e229cb051300c6e30e2d291a0e18a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEA140429701.
String Quintet in F Major: II. Scherzo. Schnell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f90e32d3cb00270eed156ca74b4aa8fc27ad699897e4ae34a6255bf37b8797. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEA140429702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ba97ab6fa7fc1cdc7a5fea1307c7edd65a33f4c373f6a4df41debf2cce52c9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEA140429703.
String Quintet in F Major: IV. Finale. Lebhaft bewegt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70374e12c47b729f3638543551c38d839cc772cc9308a5ff4840a0e302ff5ab. 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/DEA140429704.
String Quartet in C Minor: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc494704f5e1dbea06dc2e7ee79e4294ecf021f2ed0d55321910bf99901ac46. 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/DEA140429705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f4ae8befeb663faf166db02c0e22e89513c01e8c17c90c108a9a56bd60bcb6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEA140429706.
String Quartet in C Minor: III. Scherzo. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca614798101d0788673e69cdd21fe80aa01b67d191d84dc94512a3a3e508e7c8. 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/DEA140429707.
String Quartet in C Minor: IV. Rondo. Schnell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749df5cae2a3328547c2e30d6da54f60f303470806e555278d1ab5f81133a79a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEA140429708.
Brahms: String Sextet, Op. 36 in G Major & Op. 51,1 in C Minor
Dvorák: Piano Quintet, Op. 81 & String Quintet, Op. 97
Brahms: String Sextet, Op. 18 in B Flat Minor & String Quartet, Op. 67 in B Flat Major
Weber, Sains-Saëns, Klughardt & Krein: Chamber Music
Brahms: Piano Quartet No. 3, Op. 60 "Werther" - Schubert: Piano Quintet, Op. 114, D. 667 "Trout"
Piano Quartet No. 3 in C Minor, Op. 60 "Werther": I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595935b7f789cae8b5d206689764ace5486726cbf20eb58806d072cdb0f1aeff. 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/GBYDS2500108.
Piano Quartet No. 3 in C Minor, Op. 60 "Werther": II. Scherzo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc921553f65fd4e556ef1729ae50d32b141b789ad3eb863ef03ee368b417092. 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/GBYDS2500109.
Piano Quartet No. 3 in C Minor, Op. 60 "Werther": III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009e20bd9d990138994940504d817f4493d90fc4fd2a9b53c34dc83542d1d276. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBYDS2500110.
Piano Quartet No. 3 in C Minor, Op. 60 "Werther": IV. Finale. Allegro comodo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fda71f940cabf2ce7b332e0bf60a39b4131215efb0576d41e50d2806e462003. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBYDS2500111.
Piano Quintet in A Major, Op. 114, D. 667 "Trout": I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4657bdcffb9abdcaa5b21a2e0b3508a02d763d39301b5a3518d16265226ad28e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBYDS2500112.
Piano Quintet in A Major, Op. 114, D. 667 "Trout": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18b1a818814d7422f40ac89ac28bb6f903250ef070af0270e0a2a51c5309a08. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBYDS2500113.
Mamlok: String Quartet No. 1 - Polyphony No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4e965dbeaca418708d86c827f3f9d94a3c8eddba7fd413b3064199b210c37f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKI191340913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819f1336acf5276fa91fd43b0618cb673c3b584bcf5fb8cb6c58cfac82005a81. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMFME1956524.
Brahms, J.: Clarinet Quintet / Piano Quintet / Clarinet Sonatas Nos. 1 and 2
Good Night Classical Music - Sweet Dreams
Brahms, J.: Clarinet Quintet / Piano Quintet
Jadassohn: Klaviertrio, Klavierquartett & Klavierquintett