thumb|Miklós Kocsár in 2004 Miklós Kocsár (21 December 1933 – 29 August 2019) was a Hungarian composer. He was born in Debrecen, Hungary, (son of László Kocsár and Erzsébet Borsy) and studied compos
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 0xd0dd959fb6e2472ada91e9454dd6bf65e9e1052d4f29972ea54a5b0da1675164. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f49d73dd-ad23-4dc5-87b8-e0b59171f1b8.json and https://artists.proofprofile.net/proofs/artist/f49d73dd-ad23-4dc5-87b8-e0b59171f1b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Soproni / Farkas / Kocsar / Togobickij / Vajda: Violin Sonatas and Duets
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 0x784455392c92737d71882f4866cbcca749e7bf0f36439689da187e6745e3e7f1. 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/PLR401600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc52cf9b85d3bbb282b4adf7665c853545df4882aab15edca63d908e6f442b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLR401600323.
Magnificat (Miklós Kocsár Sacred Works, Vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf370d86c0a2854f8b38670341aed76cd8af590fb87ae191ced7f57a2e6d3b679. 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/HUB281900127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f94b1e04857b554c5abec3edc49afaefe5d5c4bf37c9861397e5083ae7c23b4. 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/HUB281900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f880ab9a0ed5479fa692763de1ae41e3b869f7b9e3efd16b71785df9866b942. 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/HUB281900132.
Missa in A Major: IV. Sanctus - Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28329bd5c180e4f146c97e73da5fe0e8beb52d62af1106c03195c3d52774a2ef. 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/HUB281900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a790e5decfb543227f05495bff2b94879b348f8ed15502492e216b0b980a73e. 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/HUB281900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47441b0bffaefc7dfda02ef79c065075990becb814209e482fc1889e737ad6a3. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/HUB281900028.
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 0x41061d8190850d506b58c90613168cebaa0fe0128e4f6210d777246bfa0ca558. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HUB281900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83e6c1d40cbedff54d1b4bcc8a08c6d85df21d4965635b425e8743ae61e339c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HUB281900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db309bb3cd6ca21df006a87dce6a46d602e11d9023df295ab9627e319d31f4f. 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/HUB281900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8311d0493a060fefa1dce054eb4a3a065b7db36feea79f0a02ba2e2020ac857a. 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/HUB281900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecee5c598dc449caea3e26ee094c3448d525aab80e5c910ab0bb15093bbf77dc. 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/HUB281900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6f548cf4fdb9b9715a6f90fc13eefccd2f158246817bd57a318c58174dcd34. 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/HUB281900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261f7ad630f7e8f8d7e7920c0fd8ed5fa3be83cc371693b5d4466085b74cac15. 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/HUB281900085.
Dialogues des Carmélites, FP 159: Ave Maria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae59f76faf706329cdc61e09e7c51e16708c9049f73444fae22be15d9b503940. 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/HUB281900086.
Kocsar: Repliche Nos. 1-3 / Music of the Seasons / Songs On Poems by Lajos Kassak
Kocsar: Concerto in Memoriam Z.H. / Episodi / Ot Tetel
Göteborgs Domkyrkas Goss- och Flickkörer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf93cc9e0ae0572f9a175ba458dc572892f26fc10b0097e111227b8dd336fab. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLPF6764426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1853adef3054b1cfd4d4097a3a19298546e0abb7f2d6bafa056f1f38e8edcf6. 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/GBLPF6764433.
Kocsar: Echos Nos. 1-4 / Hollos: Ciklus / Buyanovski: 4 Improviations for Horn Solo
Hungarian Contemporary Works for Flute Duet
Choral Works From The End Of The Millennium
2011 Texas Music Educators Association (TMEA): Garland High School A cappella Women
Farkas / Eben / Orban / Sugar / Nogradi / Karai: Choral Music
Kocsar, M.: Repliche No. 2 / Sugar, M.: Cimcor / Madarasz, I.: 5 Cases (Contemporary Hungarian Works for Horn and Cimbalom)
Jereb: Monography / Szekely: Rhapsody / Farkas, F.: Bucinata / Kocsar: Rhapsody / Victor: Viatrone
Horusitzky / Sugar, R. / Kosa / Balassa / Kocsar: Hungarian Contemporary Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da5241351ad15cb54005dcf64a139f69149029c6e6117b0f1e5da11d794732b. 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/USR9N0215502.