Karel Husa (August 7, 1921 – December 14, 2016) was a Czech-born classical composer and conductor, winner of the 1969 Pulitzer Prize for Music and 1993 University of Louisville Grawemeyer Award for Mu
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 0x1cef9638f310a98f2b80d77749a0a2543c5ef324a81fcbcbfbc144765564bb4f. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad54bed0-f0f8-4aed-857d-8d6121f2ca46.json and https://artists.proofprofile.net/proofs/artist/ad54bed0-f0f8-4aed-857d-8d6121f2ca46.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x0e35efcf0ac0c3989b3b7397f2d36f7961f5251cd8c5ab49e2fceabe7f79afad. 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/US7851200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d4dc79cddd36f99b01c194ecaf9277a73f09385b4d63a38a2c035a008b8f8a. 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/US7851200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744c0da2123298d7a2dad191dfdc8ef41f6582c094ea54232649b27001c669cb. 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/US7851010134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162e6a2eb73dfe4d74fa9ab5129fa45e6552a4b8ea332d0dc82a77c517979f84. 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/US7851010137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1501fedc277a375e127ccdbb65d5956290a48775a7af183d43832d2461a96d. 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/USBZ22200001.
Music for Prague 1968: IV. Toccata and Chorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa825cdca103a166acaea027daece06662960c2a6304ee8562f450039aa9455f. 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/USBZ22200005.
Music for Prague 1968: I. Introduction and Fanfare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633619ef29a827747a5ed8bc608a219a251d9d2ebd04e16a816e2033b97de6bd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBZ22200002.
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 0x155b221f53329ce1cff1ee500442b33a4df4f58b0822ee29b0113dedaacec3d3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCJB1700903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5bcdf365315d702f1b8f2210445e674c4cad742f2da891b30a39817e60b819. 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/NOCJB1700919.
2011 Midwest Clinic: Kunitachi College of Music Blasorchester
Kunitachi College of Music Blasorchester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c73c50c7a20e922fd485795f486921f3889e900dc56efece7217966d983a479. 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/USVZX1202211.
Meditations and Tributes: Works for Solo Clarinet
President's Own United States Marine Band: The Bicentennial Collection
2005 Midwest Clinic: Illinois State University Wind Symphony
Midwest Clinic 1996 (The 50th Annual) - United States Navy Band
Rhapsody for Euphonium and Band (arr. J. Brubaker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92180da1d6bf954eaa070dfc44ddba0e9f6e5750ede8913b96ebb29775f5032b. 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/USVZX1026106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa987167cb29d0fdaa96418a1fddca643441219243592069c6ab8faf3647b1694. 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/USVZX1026108.
The Music of Karel Husa: Apotheosis of this Earth
Karel Husa: Music for Prague 1968 & Apotheosis of This Earth
Husa: Divertimento for Brass and Percussion, Fantasies & The Trojan Women
Husa: Music for Prague 1968 - Reflections - Fresque
Husa: String Quartets Nos. 2 and 3 & Evocations of Slovakia
Bartók: Suite du Mandarin merveilleux & Rhapsodies pour violon et orchestre Nos. 1 & 2 (Mono Version)
Évocations de Slovaquie pour clarinet, viola et violoncello
Karel Husa: Symphony No. 1; Serenade; Nocturne
2015 Midwest Clinic: Broken Arrow High School Wind Ensemble (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62c06c3a73982197f13347d7c3c936d2b2809fce212e473ec65b2f9674eea90. 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/USVZX1601302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e200ce5d9743a6ccb620a01d56ae86ecef14047267679256b1f0ae5b3335d29. 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/USVZX1601307.
Kingfishers Catch Fire: II. Kingfishers catch fire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf247e72c4f39c53d6d9cb17bc619b36a21217620bb835f46038259a28b8204. 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/US7850910079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83dd227602c80f8501c53713d2b3c6201170caa76d3c86e9ed29f335f23aced. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US7850910081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a24a9589361cbccd35bdb805df3f15d6a83f34dd1c21789e1079c2c0c6a338. 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/US7850910084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9523f6c63e02b0700f5c0da305f69311e30c9fa9694e7795564b3a8a55820aa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM22240582.
2022 WASBE Prague - WASBE Youth Wind Orchestra, International
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Eastman Wind Ensemble Plays Husa, Copland, Vaughan Williams & Hindemith
Österreichisches Jugendblasorchester 2012 - 2014
An American Concerto Tribute to Sigurd Rascher