thumb|Pelle Gudmundsen-Holmgreen (2012) Pelle Gudmundsen-Holmgreen (21 November 1932 – 27 June 2016) was a Danish composer. Biography Pelle Gudmundsen-Holmgreen was born in Copenhagen, Denmark, and
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 0x4108c06ced5d914702ba43f7eae1d91419e68b945bc59141f488ac67af7aecbc. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fd50b9e-9305-4a79-b69c-8ad5a30b4fc6.json and https://artists.proofprofile.net/proofs/artist/9fd50b9e-9305-4a79-b69c-8ad5a30b4fc6.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 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 0xd6e15078d6f186d207f68600a7ea7a4e3e4f6ea9a883f302cfc44109936d00d8. 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/DKFAA1601701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1227e1b9f07d8c6fba56ddf21de164de8fb57dd8ea51ae9aa588a8b73c74dc. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKFAA1601711.
5 Kurpian Songs, Op.75 (1999): Hej, z góry, z góry!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c502d361eb9ecd0d6f2c837619930648f78d75a0e8895fd431686a3e2edcca. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USHM10539111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e26788e888e319daea7e31ba908b04680d85bcd8b3f511b180400b856dd316. 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/USB8U1700937.
Gudmundsen-Holmgreen, P.: Plateaux / For Piano
The Royal Danish Academy of Music 150 years
To the Hands: No. 3, Her Beacon-Hand Beckons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d2961dfe961e298fcc0164158162d4b1d3289544e7e902e3a6ad04234112b2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US29K1791203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3224280193f77f9eadf85114d8e3710d7fb692e33a0b7f47f608473c83b93b11. 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/US29K1791206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68bdae882efd165b77c02bde07a60351cb9066ccc754129785191644a91b8b1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US29K1385601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38abf181990eacdc1e9ae7852d240f4d85cda78465ba9e3ddde4d5446eea4898. 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/US29K1385602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a6459869b592bfed64544c594805d4bd259719baf5b2531a2ae76bca408f66. 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/US29K1385608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfa3533c5330d46ca464ba4ed1676653ca9d84606b0edbc1c33a5360637f64d. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/US29K1385621.
Nordic Sound: Tribute to Axel Borup-Jørgensen
Everyone Loves the Spring - New Danish Songs
Gudmundsen-Holmgreen: Complete String Quartets, Vol. 2
Gudmundsen-Holmgreen: Complete String Quartets, Vol. 1
Pelle Gudmundsen-Holmgreen: Incontri – Works for Orchestra
The Natural World of Pelle Gudmundsen-Holmgreen
GUDMUNDSEN-HOLMGREEN: For Cello and Orchestra / Concerto Grosso / Frere Jacques
Gudmundsen-Holmgreen: Music for Voices and Instruments
Gudmundsen-Holmgreen: Concerto Grosso, Moving Still & Last Ground
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c8b001fb50a6d03d17af8c21ed4a49869d5d094d4a667286466faa956b6a1f. 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/DKECA1405201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeea3c58388c5fac6efec00e4c2dd275be44d48decd172f271397d09c773406. 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/DKECA1405205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1adb51f6a594b88482195b4bff93b5cff56310fb11165f4e43e98f8049bd864. 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/DKECA1405208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65b179ebf6adcb8c133aed5c05fc5f868855d1c2d8daf07ec774315ba85e408. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DKECA1405210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fde75ffc36d8b787c6c1758800db7a278b36b01627fc4600336013ba14c9a8. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DKECA1405215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f291de9156394f9e199d05c369033cfab8619cd6831b22f09b2a0b952c1f2d. 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/DKECA1405217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94788543389e7517ed78f10e0e49def91e073d36fc87ee3c0febe4af14c85f5. 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/DKECA1405218.
Allan Gravgaard Madsen: Nachtmusik - Gudmundsen-Holmgreen: For Violin & Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0cc40c447e84d076b47ae7b302ad4b5990f5ae7e6d4a98b921b1c4ab060cb5. 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/DKFAA1902301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfeb2e6f9383ae7ceb81c5b87f00956c9620fd1ed3225023f6681a5e104b95e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKFAA1902302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c9df2dbb6c71a985014cce15f735e3387f2d59e613c3c1ad2ecf09b117f248. 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/DKFAA1902303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6f25a27c0874efca70b4282478519c9d8129fc3d45b0ecc0432ff18a212750. 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/DKANP5174111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bde791600369f095f02b219dc7ab2b7cd7a4d108424292c36a6fe8550819c4e. 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/DKANP5174120.
根據漢斯·克里斯蒂安·安徒生所寫的歌詞譜寫的歌曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ac688098cc3cc72dda839ba0cdda7283db643297c3d807defca010bbf09736. 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/DKBW50500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad9e05b99db219423b8e645705f250a09f317f1a80ea290d1327f162b555bbf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DK3H11400117.
Norgard: I Ching / Xenakis: Psappha / Gudmundsen-Holmgreen: Triptykon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30247323de84cc841bd00470bdeeb89836f9f4204a0385510d735b094bfe8745. 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/DKFD52559026.
SONGS TO TEXTS BY HANS CHRISTIAN ANDERSEN
Frosty Silence (The): Music for Guitar by Danish Composers
Gudmundsen-Holmgreen: Symphony-Antiphony / Rasmussen: Symphony in Time
Pelle Gudmundsen-Holmgreen: Green Ground (Live)