Bo Holten (born 22 October 1948) is a Danish composer and conductor. He has been the principal conductor for the vocal ensembles Ars Nova (Copenhagen) and Musica Ficta (Denmark), as well as guest-co
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 0xbfd326340e8bd70c1d7002d77e09a0708cf76b50fc395c52f7e72ab08e4b2a71. 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/01a1159c-4545-42b1-838e-e9470fbdb464.json and https://artists.proofprofile.net/proofs/artist/01a1159c-4545-42b1-838e-e9470fbdb464.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Passio Domini nostri Jesu Christi secundum Matthaeum: Quemcumque osculatus fuero
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 0x883c3476edba7b7181084ecd3afbfa1fe71fa0fc4f97c170eb02bccb54eded1a. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191726314 — a six-check JSON result.
Holten: Wisdom and Folly and other Choral Works
Of Kings and Thrones - Classical Music of the Middle Ages
Cantiga 35: O que a Santa Maria (arr. J. Ferrero for chamber ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17630681ff4dc45d44cd3fe65c1c77b967664949ea13429537b46b0c96769f5. 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/HKI191156101 — a six-check JSON result.
Dance of the forest of no return (13th century) (Stantipe II) (arr. J. Ferrero for chamber ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff4038c204a057f74065fde862a890b0563c4451d4a569d199d03ef16ef7448. 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/HKI191156110 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7686fb01f7640678cab7e1be8966ec6229caa07a7d622932a58bdab00578e241. 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/HKI199593503 — a six-check JSON result.
La ultime Estampie Royale (13th century) (arr. J. Ferrero for chamber ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd65cf76a6ee3a984faa2fa074394585efb3e68af0e9df5c4b777b682ffae21. 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/HKI191155912 — a six-check JSON result.
Adorna Thalamum [Erfurt, 1301] (arr. C. Haas for chamber ensemble)
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Vandring i skoven (Arr. B. Holten for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0508240080bd0048c161371436a39c39238224d90b741ca97fd6d5b47764467. 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/DKHJ61800201 — a six-check JSON result.
20 Folkelige melodier, FS 95: No. 19, Nu lyser løv i lunde (Arr. B. Holten for Choir)
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Det er i dag et vejr (Arr. B. Holten for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f82476e515767d4935022965f6d69c9b96c7e0e1a0e3ab7583b71f086dc6763. 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/DKHJ61800203 — a six-check JSON result.
Den blå anemone (Arr. H. Metz for Choir)
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Den kedsom vinter (Arr. B. Holten for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c17a459834ecf390f3fa71ae94767c2cd51c71e2ca8002eb5953dba251286b8. 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/DKHJ61800205 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a4db87ffa49f4928b7d881596241776c5ac00faec1273164bbc1f43a463ff5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKHJ61800206 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f3ac5174992663fc807d88807b772a617fa2a1e79d09b830d4f60dc616b5a5. 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/DKHJ61800207 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e28437a41c1dc2ab390d039e51b412fc0a56ea1c54457cb888f8b6a49478a21. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DKHJ61800208 — a six-check JSON result.
En yndig og frydefuld sommertid "Kærlighedsrosen" (Arr. J. Jersild for Choir)
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En snes danske viser, Vol. 2, FS 78: Se dig ud en sommerdag (Arr. B. Holten for Choir)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e52c30fb58151b831aa653cd73bacf9af7eabc3f4c1852e3deaefead826a0ef. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKHJ61800211 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b966656bb1bc81e4a12198c269e47c833b117d4fb649c91727eb9c427da93e6. 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/DKHJ61800212 — a six-check JSON result.
Hvor smiler fager den danske kyst (Arr. for Choir)
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Danmark, nu blunder den lyse nat (Arr. for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3029ae73f5799c284de3a09ece6c81ca436c4a156f2adb22779928aa9ecd7b54. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DKHJ61800215 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e49d96fe259df0cf844e8338ca73fd891c6d0712ed4967083f6fe14ab2cff8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKHJ61800216 — a six-check JSON result.
Septembers himmel er så blå (Arr. B. Holten for Choir)
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Sig nærmer tiden (Arr. B. Holten for Choir)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1ce63b416d2b72dea292e0bb3108dce85656ba239ce01cd28b02e768e9ff36. 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/DKHJ61800222 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d566cd9dd355e3da62b2c27956c5e30c51c7ebc774c94ef1353fbb52d2a81e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKHJ61800224 — a six-check JSON result.
Der er ingenting i verden så stille som sne (Arr. for Choir)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb2fadd7f501bde7ee176bc32e6352e849c7a7513776d590130bdbc2cd3144b. 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/DKFAA2300224 — a six-check JSON result.
Det haver så nyligen regnet (Arr. B. Holten for Choir)
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Hver dag en ny dag (Arr. B. Holten for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a5c506b803799097f29e9aa0f10c5e117808b1a9ca62462e3aa3f89d44054a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKFAA2001207 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df325d317520dc4eb6147d4cedd11acf667154f0518181453f5953dcec3b29b. 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/DKFAA2001218 — a six-check JSON result.
Playground - Rikke Sandberg Plays Works by Herman D. Koppel
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La finta semplice, K. 51, Act II: Act II Scene 1: Aria: Un marito, donne care (Ninetta)
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La finta semplice, K. 51, Act I: Act I Scene 1: Aria: Troppa briga a prender moglie (Simone)
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La finta semplice, K. 51, Act I: Act I Scene 2: Aria: Marito io vorrei (Giacinta)
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Den danske sangskat, Vol. 7 - Folkesange
Madrigals Libro 6: No. 1 Se la mia morte brami
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe897e8c820d9468d0a67a97af1a8406f3961c391184554ca6d0a5b5f27bcdf3f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DKECA1506008 — a six-check JSON result.
Cantigas d'Amigo: No. 3. …to see my friend there
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63377dc6a8d6f9ad2d1d58f6905da9b3961fde23951e9a0da3c1cc515012a11. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKFAA1101409 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d2a92b99dcbf240d4ca19def25d6281fbfeb1837d0c1c4ccff8f4f8a8f942e. 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/DKECA1102113 — a six-check JSON result.
New Songs for Choir: Danish Love Poems from the Middle Ages to the Present
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Robert Schumann: Choral Works (VRT Muziek Edition)
Vocal Ensemble Music - Seized By Sweet Desire - Singing Nuns and Ladies, From the Cathedral To the Bed Chamber
Carl Nielsen: Commotio / Early Songs / Violin Sonata
Reesen: Trianon / Variation On A Theme of Franz Schubert / Himmerland
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Hartmann, E.: Nordic Folk Dances / Hakon Jarl / A Carnival Feast
Koppel, Thomas: Los Angeles Street Concerto / Moonchild's Dream / Nele's Dances
Holten: Sinfonia Concertante & Clarinet Concerto