Sebastian Manz (born 1986) is a German clarinetist. He is solo clarinetist in the SWR Symphonieorchester, international soloist and chamber musician. He is also active as an arranger and composer. Li
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 0xebe9b125e4525ec2f96a7b26aa9f8114090cfc4630ec677b2a0747f507ab2d86. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/716a04a3-f114-4e5a-8487-7b8b776194a3.json and https://artists.proofprofile.net/proofs/artist/716a04a3-f114-4e5a-8487-7b8b776194a3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Carl Maria Von Weber: Complete Works for Clarinet
Variationen Über Ein Thema Aus Silvana, Op. 33: Thema
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 0xed848e6fb36a74750a8892bae79bc895ef46dc66a01976d67b9eee063c38b1d9. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DES381638004 — a six-check JSON result.
Concertino in E-Flat Major, Op. 26: Concertino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32464de7fa5820fc716fb762a4fe6f76e47d18de6190dd42aee23546cdf81dd7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES381638016 — a six-check JSON result.
Fantasy Pieces, Op. 43: No. 1, Andantino con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc5a9cea0552381650d8dd01f3f496c9da9c0e14d751c23e77a81a53ec3ad9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382220005 — a six-check JSON result.
Fantasy Pieces, Op. 43: No. 2, Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d948fea9699ecb649fac6305fde82d239c6dc53c85e695bd50dbc7f75f94e6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382220006 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e04e28cca345594ceb5c65b4abfa395181edce981aaf23db65ecf7b17b701d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DES382220007 — a six-check JSON result.
Fantasy Pieces, Op. 43: No. 4, Allegro molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2633f32a701e2fc9a4c64e6942986bc4279eff4cb806c89cdd5e7ef9e29f7355. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382220008 — a six-check JSON result.
Fantasy Pieces, Op. 73: No. 1, Zart und mit Ausdruck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34e6332ef43a787bbfda53f701b82d44fb503174a2b629feb9a886e2a22fc68. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382220009 — a six-check JSON result.
Chichester Choral - Arr. Manz & Studnitzky
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0c15816437664e83702deab8b487304e20c043709e55f8185dac8f8f8dced9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES381920008 — a six-check JSON result.
Le cauchemar de Stravinski - Arr. Studnitzky
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35f0d42fdf93b5818f498ad6811d4aef8d8fcc645dd4ce35430c99d13c1b4b5. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DES381920016 — a six-check JSON result.
Three Shanties for Wind Quintet, Op. 4: I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f54b232cfdfa68e2da0c1fdcbde8955507e83eaba85534e00dae1857e61102d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380023203 — a six-check JSON result.
Three Shanties for Wind Quintet, Op. 4: II. Allegretto semplice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e08609fda3a51848ceb24a3f9737166501a5fde0b08f25485cda50a5a9f1d6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380023204 — a six-check JSON result.
Three Shanties for Wind Quintet, Op. 4: III. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01b5f96ab3e874400f25e1feae44e6753289cf2c83a13594c2c09323fa76863. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380023205 — a six-check JSON result.
Quintet No. 1: I. Andante tranquillo - Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f3733badad4ed01bc7a3d51316200af6dd36880059f0a1914fc3518201d761. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380023206 — a six-check JSON result.
Clarinet Quintet in E-Flat Major, Op. 102: I. Allegro molto moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fbcba86dc09c6aa795554d6493e2382b54ffb22217e3fd28b72f1cb27c329a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEAQ71430001 — a six-check JSON result.
Clarinet Quintet in E-Flat Major, Op. 102: III. Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2906c751ee2fa6f4617f41827f08ff72a0710e5ebc878145571cee911baf738f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71430003 — a six-check JSON result.
Clarinet Quintet in B Minor, Op. 115: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49571f3bdfb8d66274d8f899a55b054bf6e6d9730915b6ba0f80d838011d5221. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71430005 — a six-check JSON result.
Clarinet Quintet in B Minor, Op. 115: II. Adagio - Più lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9af9d741e01f1f1a159344aef626ebbab6ae2ec8bf8deacd7bb543713c882e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEAQ71430006 — a six-check JSON result.
Clarinet Quintet in B Minor, Op. 115: III. Andantino - Presto non assai, ma con sentimento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce3e4e9fc4ec55b4a9a49e0b446e60f9e006537a0cfb72fa1ed0806d1534d93. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71430007 — a six-check JSON result.
3 Preludes: No. 1, Allegro ben ritmato e decisio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbedd4b7762c5d37960bdcb027474e8b856b210043581c1d682ebe2713af8e7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEAQ71327101 — a six-check JSON result.
3 Preludes: No. 2, Andante con moto e poco rubato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7f270f0606161dddeec554677c23632a066c1a85b3c1c9168d3fd0b3cf16ea. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71327102 — a six-check JSON result.
3 Preludes: No. 3, Allegro ben ritmato e decisio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b1bbaf52a0ef816e9f4fd625fd622ad9befd272f860c1e45ad4cfaab0e481e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71327103 — a six-check JSON result.
Pocket Size Sonata No. 1: I. Improvisation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c23099e7607b40af61647512d79193cd94bde8d34af1c4d303f3ef5c965e67e. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71327104 — a six-check JSON result.
Pocket Size Sonata No. 1: II. Modal Blues
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0ee7bd2cbc24eaf06a4beeacbb48d520c4c30dd40eced1c6085a1fcce75772. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71327105 — a six-check JSON result.
Pocket Size Sonata No. 1: III. In Rhythm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67afeec833ceb77e1ef95b7b52131f6116d05550191ba11a385492a97c23c5e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEAQ71327106 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf54dd3c06f1dc1453107a3cf8947c648765e371c4ad239a4ec50899edbccc02. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71327116 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b193a6f1a72484829dac9b1216f3656d1b9b279faef02bcf676f1b2135d672. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71327117 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70c545b2dc7ac8ac602961670236167103274913336617aa20398c12c75218f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71327118 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a1743acd0700627bc0dbe57d5b1167705a80a35ea688910e437860b3670bc4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71327119 — a six-check JSON result.
Winds & Strings: Spohr, Ibert, Janacek & Widmann (Live)
Smetana, Ravel & Watkins: Piano Trios (Live)
Westerhoff: Symphony - Clarinet Concerto - Double Concerto
Mozart & Beethoven : Quintettes pour piano et vents (Quintettes pour piano et vents, quintets for piano and winds)