Amadinda Percussion Group is a percussion ensemble that was formed in Budapest in 1984 by four musicians, who had just graduated from the Ferenc Liszt Academy of Music. Since founding the ensemble, t
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 0xd584594ef97587ba7fff8aa28287194e3a5c0b4175179fe75b2dee23e1a4bf03. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74600d14-2034-4be6-b0ab-82fae18faf61.json and https://artists.proofprofile.net/proofs/artist/74600d14-2034-4be6-b0ab-82fae18faf61.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x6587c23b3c6cb6d2888f38e0f23fc5d814997eb8d97a9384648a0f1415bfe3e9. 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/HUA182240602 — a six-check JSON result.
Cage: Works for Percussion, Vol. 2 (1941-1950)
Reich: Music for Mallet Instruments, Voices and Organ / Music for Pieces of Wood / Sextet
Music for Mallet Instruments, Voices, and Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588e75ab5ac8242ecb935704eb241d3e585e6827ec335c9125fc0622cb47b6e4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA253135801 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc701896aba75c7a3d0fe5907428999ce74e1cb0472d4c588db3133904d48f3c. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/HUA253135802 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0ce66f5bd614859493826e78ec4dc546fac2ecc0bc086a297849b7dd17eb0b. 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/HUA253135803 — a six-check JSON result.
Marta: Story From A Doll's House / Reich: Piano Phase / Cage: Second Construction
Cage: Works for Percussion, Vol. 6 (1975-1991)
Cage: Works for Percussion, Vol. 5 (1936-1991)
Cage: Works for Percussion, Vol. 4 (1940-1956)
Cage: Works for Percussion, Vol. 1 (1935-1941)
Cage: 4'33" / Varese: Ionisation / Chavez: Toccata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879d7bf83dd834d96b98bdc9f1d1e8e25eae822155f306fb0b872400776db2eb. 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/HUA251299101 — a six-check JSON result.
Amadinda Percussion Group: Legacies 5 - Live Recordings 1989-1999
Cage: Works for Percussion, Vol. 3 (1991)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1709827078c3ba14bd29c68ab3335fcec4971e4011c379ea1bf16c59d40637e1. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DEA800102300 — a six-check JSON result.
Ligeti: Chamber Concerto: I. Corrente. Flieβend
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c7718171402257bdcb467c767f5c50bf750be94bce61f805ef8a957952c5b5. 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/DEA800102401 — a six-check JSON result.
Ligeti: Chamber Concerto: III. Movimento preciso e meccanico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31009f887c77b7f71e0a4deb58881477a751dc22b41cea81f4050d7cfcf1067a. 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/DEA800102403 — a six-check JSON result.
Ligeti: Piano Concerto: I. Vivace molto ritmico e preciso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb604b5bb1e6b2db7a9ef111164074ae17208d66a430d37c1fdc750e34e933860. 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/DEA800102501 — a six-check JSON result.
Ligeti: Piano Concerto: II. Lento e deserto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8215b099ed74223db48210e53b6d96c3e6c9e15515baf03f4b33befc13fab0f7. 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/DEA800102502 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a42cf8c55fa6869a32eb9c1441df7e80e4b64948fcd12c90fa2f5a10b72d470. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEA800200224 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd130a9a40caf1af7a4e1a6b3190a50765be9ed822f21975849ce8eb2bc8610e0. 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/DEA800200225 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b3e76b85e07d2a58881caa08ebd92e5a0bb2c555cb1de77bdb93ad3b6c1f2c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEA800200286 — a six-check JSON result.
Ligeti: Requiem: IV. Lacrimosa. Molto lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89ead4f49d393c7a5b96f30a3553c99ca2612d4bd7a1964192eb3b139471335. 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/DEA800300352 — a six-check JSON result.
Ligeti : Project Vol.3 - Cello Concerto, Clocks & Clouds, Violin Concerto & Síppal, Dobbal, Nádihegedüvel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0baecf42a95e7ee119e533a34b942d306e22ac4240ae081250c7933fd0fb5c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEA800200284 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b670e7d84f4d58ce6b0dba406ff32dde93dc2233cd7095a60bf6f4666296f9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA800200285 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b3e76b85e07d2a58881caa08ebd92e5a0bb2c555cb1de77bdb93ad3b6c1f2c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEA800200286 — a six-check JSON result.
Ligeti: Violin Concerto: I. Praeludium. Vivacissimo luminoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8299b26e59fe5a97c5ee66a0c299436ee75260b0db91ae90abb264f421a60bd. 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/DEA800200287 — a six-check JSON result.
Stravinsky, Janáček, Bartók: Village Stories
Stravinsky: Les Noces (1917 and 1923 Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdbff1fe303805706b816b1c56877ba3af38e08b65703954994d460eec92e58. 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/HUA253220801 — a six-check JSON result.
Hungarian Jazz History, Vol. 13: Ragtime!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be6c82ca42893b4ba95b89f4845611a6319785293cd74f13c0a91af3a3dfae3. 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/HUA257116202 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533e10369713fe01054a89418634ab5eca8a820ca64343a6bd12442c205e07fe. 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/HUA257116203 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13fc9a84ceddcb510757f5c4bb5f6a736df6ff90890f103e13d66ec74c66957. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HUA257116204 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252476cd5b440fd81347420445d0931cdc72da990a9436703d124437049474a2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HUA257116205 — a six-check JSON result.
Marta: Glass Blower's Seventh Dream (The) / Tamad A Szel (The Wind Attacks) / Kapolcs Alarm
Cage: Works for Percussion, Vol. 2 - Legacies 3
Hungary Amadinda, Locomotiv Gt, Trio Stendhal: Zorr
Marta: Anatomy of A Scream / The Wind Arises / Story From A Doll's House
Sugar, M.: Mosaic / Musica Agile / Dissolves / Cloud Variations / Reminiscences / Chorea / Meetings
Lang: Violin Sonata / Cello Sonata / Canto / Viviofa
Gemesi: Church at Dawn / Portrait of Istvan Macsai / Pavane Pour Une Infante Defunte / Clods / Duo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdbff1fe303805706b816b1c56877ba3af38e08b65703954994d460eec92e58. 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/HUA253220801 — a six-check JSON result.