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 0x756c822a7647c9f5eb7dfd5a4bdf3d3c88d193052d58881f0567e1818e61e16e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9ddad43-fe80-4dd6-8173-259e250bf691.json and https://artists.proofprofile.net/proofs/artist/a9ddad43-fe80-4dd6-8173-259e250bf691.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Antique Brasses: Original Brass Music on Period Instruments
Clarinet Concerto No. 3 in B-Flat Major, Op. 11: I. Allegro risoluto
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 0xb6f3f615d9b620cd7e36353eeffa7fcbb070d18dae6e3e0f8d7640ffaeb162fe. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SEAED8745070.
Clarinet Concerto No. 3 in B-Flat Major, Op. 11: II. Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778d99d35381e646e89a0383c31693c9edc8a6637046fe074b2b78aeb5f77084. 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/SEAED8745080.
Clarinet Concerto No. 3 in B-Flat Major, Op. 11: III. Alla pollacca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cecae53c012857d1c15150e23e57acd0f756e1208c093967234e5d7e87229e3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAED8745090.
Crusell: 3 Quartets for Clarinet & Strings
Crusell, B.H.: Clarinet Quartets Nos. 1-3
Crusell: Introduction et air suedois - Clarinet Concerto No. 2 - Concertante in B-Flat Major, Op. 3
Clarinet Concerto No. 2 in F Minor, Op. 5: II. Andante pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda442e74549764ac9830c3671779b62940eb7c7fbaa3e2e537729515404e8a17. 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/USB8U1041973.
Crusell, B.H.: Clarinet Concertos Nos. 1-3
Clarinet Concerto No. 2 in F Minor, Op. 5: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6d4e2f16b4627eb43df6cef2026ca8442cb3274d4369bb4cb0f5e87c062a0a. 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/SEAER0823010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1630bdb7dcec4b1043a9d3a1be3b8eb8d3943e0699737241b5cbe9b04cf36e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEAER0823020.
Clarinet Concerto No. 2 in F Minor, Op. 5: III. Rondo. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82359c3ec3d48c23c1d3167b40b5faf7bdd7debd263cbac70bbfa7e7952bb77. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/SEAER0823030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd04e6958564ea1b9828de1fefecfbc6b7496fd2b8e801d14bc2b903bfb3d727. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SEAER0823040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c92b2efae66c67fba74ec754922d11e8786c6ff0c02a36121e9dc7e5d13a141. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAER0823050.
Clarinet Concerto No. 3 in B-Flat Major, Op. 11: III. Alla polacca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c814b2321941bfac31e438550529b40959544bd9378f11db1875a3bd6b713a. 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/SEAER0823060.
Clarinet Concerto No. 1 in E-Flat Major, Op. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd873d69a62122a29259f4e4a63edcbac4073acb52179187f659a5e71a17d5fad. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEAER0823070.
Clarinet Concerto No. 1 in E-Flat Major, Op. 1: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3488dc4cf08404f8207deeffdedc3f23e873028237313d4bf964d55feb28e7d8. 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/SEAER0823080.
Clarinet Concerto No. 1 in E-Flat Major, Op. 1: III. Rondo. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f1c3cd522cffda9c507702d9f582d73b7d13dde50c2c1e6edab6c812e9fc5c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SEAER0823090.
Crusell, B.H.: Clarinet Concertos Nos. 1 and 3 / Concertante in B Flat Major
Clarinet Quartet No. 1 in E-Flat Major, Op. 2: I. Poco adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32ac41b8abf37c16db59c4147d059ff264b8a977b7da776c228c5242c967ef0. 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/SEAEH9541010.
Clarinet Quartet No. 1 in E-Flat Major, Op. 2: II. Romanze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f928e734015b746a0827c7168a58c9bc487bb959470ed43c0560ab6fb57b83. 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/SEAEH9541020.
Clarinet Quartet No. 2 in C Minor, Op. 4: I. Allegro molto agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3459381322a356eb5c33ee8ef93e6c26397d43b4b2efa6a915227de093fd2608. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEH9541050.
Clarinet Quartet No. 2 in C Minor, Op. 4: II. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea3667a157edef85d2db1df5f2f2751d40ffc602aaa4f095a2ade572d79a1e1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEH9541060.
Clarinet Quartet No. 2 in C Minor, Op. 4: III. Pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade84061ef2ca2385860d3a5e3f3ad566137266910d32589f9434dc99055bcf0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEH9541070.
Clarinet Quartet No. 2 in C Minor, Op. 4: IV. Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aef97cfde0643d454506eb9b0bbe69fc8580cec23bb2b7a2d3091fb56b3402c. 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/SEAEH9541080.
Clarinet Quartet No. 3 in D Major, Op. 7: II. Un poco largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8332038b948d46267e90362607fa5c834ce52f74b2086fc5107c0a63d951192. 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/SEAEH9541100.
Crusell: Clarinet Concertos Nos. 1, 2 & 3
Crusell: Concertante / Bassoon Concertino / Introduction and Swedish Air
Crusell: Clarinet Quartets Nos. 1, 2 & 3
Crusell, B.H.: Clarinet Quartets (Complete)
The Clarinet in Concert, Vol. 1: Bruch, Mendelssohn & Crusell
Weber: Clarinet Concerto No. 2 – Crusell: Clarinet Concerto No. 2
Crusell, C. Kreutzer & Reicha: Oboe Quintets