Václav Luks (born 14 November 1970) is a Czech harpsichordist, horn player, conductor, musicologist and pedagogue, founder and artistic director of the Prague baroque orchestra Collegium 1704 and of 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 0x4070ed3f66e7cb94a05bfea26aa82edc183d4f7057c6e87c6f0b753c82209683. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90ba403f-bdbf-4b26-80f1-b76598c41940.json and https://artists.proofprofile.net/proofs/artist/90ba403f-bdbf-4b26-80f1-b76598c41940.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Zelenka: Missa Votiva, ZWV 18 (Alpha Collection)
Missa Votiva in E Minor, ZWV 18: I. Kyrie I
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 0x287141c6c3ffda5da6eba5fdbd425184807609e15495570435f0581a0e32d6f6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR1P70702240 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: II. Christe Eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263fbe860628e5d159ab9e2cfdedb73179771254fb48f2ef0980ca6a86306f1a. 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/FR1P70702250 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: III. Kyrie IIa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2561e124f6f2a63c3190e7e32f59946252ef873e5e93a804c2641a69738d94. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70702260 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: IV. Kyrie IIb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe65104902efccadcf7b37e9dc399fe5246260d6483df7a33ece196a50f42c5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR1P70702270 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: V. Gloria in Excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8e91ac59a98e031f1d9e7387e002f16f73608e366921967a645f2eb27329ca. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR1P70702280 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: VI. Gratias Agimus Tibi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19ac352ba9d88969c9644f51b7ec5aa921ae6c42e10158ae606bc0a7be8cb91. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70702290 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: VII. Qui Tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bf380d472337a4c29c0771a07915e3259c1c10bfa2157d15608bfaab77fa76. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70702300 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: VIII. Qui Sedes ad Dexteram Patris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8743f02179533229d2bf365936f4f1886a56ed2988fc2b1261128096c2ae43. 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/FR1P70702310 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: IX. Quoniam tu Solus Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee46a971f460d0fc9f380c825020a120f7b70ff676fd6a36970e661256822344. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR1P70702320 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: X. Cum Sancto Spiritu I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e56847a07931ea7e16dbcdede7e438b27bd22bb9d67011e8ce7ccbb49f780f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70702330 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: XI. Cum Sanctus Spiritu II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d57b5badcf1725904afcb36950fcf7cf1d97a92744c0f8054283343c117baa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1P70702340 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: XII. Credo in unum deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6fd0e11ddccc1faf6a275a92f78fbf93ecb67cb8770d4ba415ecb0690e4901. 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/FR1P70702350 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: XIII. Et incarnatus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b5416091d6bb62467996c2cb3a020c68d8d2b693bfd8e6a45104dd2ff93830. 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/FR1P70702360 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: XIV. Crucifixus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824b1cb1b5574db5968fa59aab6abc991a9f7d8c882bde315da426f8669db155. 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/FR1P70702370 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: XV. Et Resurrexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae15141c461a4e07311301a3c535dd9eb9e9820ce7d9e7e02d3cbd6c88466c19. 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/FR1P70702380 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: XVI. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee564a92ef2d5e72bf656f14898179ef0cc9834180a633cc48a6a233d7b06c6. 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/FR1P70702390 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: XVII. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aba12dc320635e36fe88823c4b0ec88a05bb30dfe5addd61c6d7b1c2aada58. 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/FR1P70702400 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: XVIII. Osanna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2cef91b3052b01c4c2948277d2780d7305f795c1d5d6735d87973ad7e37a84. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR1P70702410 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: XIX. Agnus dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844c710d4baf5cc79d67437f7a8e72b7d4214193d770fd9e8625963d817b2f69. 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/FR1P70702420 — a six-check JSON result.
Missa Votiva in E Minor, ZWV 18: XX. Dona Nobis Pacem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aae06d89e52504d04d8dd4f3a70c1f908b85dd575331fe9bf2bef8be1c1875. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR1P70702430 — a six-check JSON result.
Les Grandes Eaux de Versailles (Musiques des fêtes royales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3adb2ee54fcdecd6798625dded6240788a0d6ba2a63084b03141a2d8265464. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11829329 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e7217d2de36e9eac8f92457b5bbf3caa6edc5bb9f0df5c02dda2c0c537c45e. 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/FR9W11828933 — a six-check JSON result.
Exaltabo te Domine, S.66: Exaltabo te Domine, S. 66: II. Psallite Domino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79311015a019ff74d6bbe74270bbded1aaf6be5e2a1dee465d1ace0308908c12. 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/FR9W11828936 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4302720b8c6abb0bc18e79f6762e6441d6c5c468e0e2619ca15b2874a1c8256. 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/FR9W11824543 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4104a2807adc14651425bcd5043814fcadf7849cbd8e57164eabb08b0a82d485. 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/FR9W11829330 — a six-check JSON result.
Te Deum, LWV 55: X. In te Domine Speravi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527e823bc50b8dc3a80aeb7425ff2b19f8aa1979bce8562fc82366830cde6b65. 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/FR9W11829333 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b36ae76cab0de1c33e5597c58162cf02eb72f1b4127c7b6d7abe0ce619b5254. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11829335 — a six-check JSON result.
Zelenka: I penitenti al sepolchro del redentore, ZWV 63
I penitenti al sepolchro del redentore, ZWV 63: Aria 'Squarceia le chiome'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d20fc57efdbb2ad74deef34c7e5f6f4ee287240a622236a885350b28598927. 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/FR1P70901930 — a six-check JSON result.