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 0x3f4e71f6484b96b7904bbf53f25aa02f76c722f29afdd381fa8477d4d82c5c38. Chain 2 (Bitcoin): anchored in block 954134 (2026-06-17T19:41:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7db43d62-2f56-41ce-b12a-98981bb18f0d.json and https://artists.proofprofile.net/proofs/artist/7db43d62-2f56-41ce-b12a-98981bb18f0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zelenka: Missa in D, Responsoria pro hebdomada sancta
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 0x23133bd191549af3a4510051b54401411e38704ed8b3b9c3265d1f57a3ff7839. 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/CZA160417044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22313144befba85242a1fb93bf5ebe10ee662014482e1f89b56f6756e77e4d1b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160417043.
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
Martinů: Opening of the Wells, Legend of the Smoke from Potato Fires, Mikeš of the Mountains
Czech Baroque Christmas Music (Mono Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7c37d669e005d4606c0d8215e75c51bfd60ddc1d7d7c26dce79f80b8c5f80d. 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/CZA168103092.
The Bartered Bride, JB 1:100, Act I, Scene 1: Let Us Rejoice, Let´s Be Merry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a554b10eb4703b79885b88a5d6be5a63828c04edde0fd4ecb3508e5ad53ae87. 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/CZA168104092.
The Bartered Bride, JB 1:100, Act II, Scene 1: Furiant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc33e3d02fd176a85ebed867a96ad6cfc6788d88fe2780335f4c76437f6b5f1e. 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/CZA168119092.
The Bartered Bride, JB 1:100, Act III, Scene 3: We Shall Make a Graceful Little Bear of You ... (Principál komediantů, Esmeralda, komediantka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f52e1d6ff6a7bc12a5b843a7af34ebb9c393e9a9dc185bd96925d90ca84d484. 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/CZA168137092.
The Bartered Bride, JB 1:100, Act III, Scene 9: What Have You Decided, Mařenka? (Krušina, Sedlák, Ludmila, manželka Krušiny, Mařenka, Krušinova dcera, Mícha, gruntovník, Háta, manželka Míchy,
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583f1a4eb50b06e8f878d21f7f9605aab72a4d0ac653305685986c75b96823e4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA168147092.
Smetana: The Bartered Bride. Highlights from the Opera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7c37d669e005d4606c0d8215e75c51bfd60ddc1d7d7c26dce79f80b8c5f80d. 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/CZA168103092.
The Bartered Bride, JB 1:100, Act I, Scene 1: Let Us Rejoice, Let's Be Merry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a554b10eb4703b79885b88a5d6be5a63828c04edde0fd4ecb3508e5ad53ae87. 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/CZA168104092.
The Bartered Bride, JB 1:100, Act I, Scene 5: Finale. Polka and Chorus. Come On, Girl, Let's Be Merry ...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2353ebc751e9229620da96ccb3319a0809f090c12aed8b69f6adc0e7772760e6. 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/CZA168114092.
Roussel: Evocations & Le festin de l´araignée
Jenufa, ACT ONE: Vy starenko, uz tak na vselicos (Laca/Jenufa/Grandmother)
Vilém Pribyl/Libuse Domanínská/Marie Mrázová/Orchestra of The National Theatre Prague/Bohumil Gregor
Orchestra Of The National Theatre Prague
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0935f5925273fc5778a40f3efc5f313da46a073f4e61c1561ef48446829a6fa5. 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/GBAYC9502032.
Jenufa, ACT TWO: Marnicko, mám tezkou hlavu
Libuse Domanínská/Orchestra of The National Theatre Prague/Bohumil Gregor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72177a88b6ea471be139d4b26fd0ff2404db2cdd0d03b5bb582f013b3e87773. 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/GBAYC9502059.
Jenufa, ACT ONE: To bude pekná svagrina (Laca/Miller/Jenufa/Grandmother)
Vilém Pribyl/Jindrich Jindrák/Libuse Domanínská/Marie Mrázová/Orchestra of The National Theatre Prague/Bohumil Gregor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aad4a2c1406e95367306dc653d61e67a0ec5eca245683dda9286f5cdae5262. 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/GBAYC9502037.
Jenufa, ACT ONE: A ty, Jenufo, neplac, neplac! (Grandmother/Miller/Laca/Millworkers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b31929e429ff653b26635b2b92ec2ef8e85e33576a9740afcc985373e203385. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBAYC9502043.
Martinů: Les Jeux de Marie, Cycle of 4 Operas
Little Red Riding Hood: (Karkulka, Babička, Myslivec, Vlk, Kočka Lízinka, Koza Bělka, Kůzle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a54cf37f33de463b2fb3cf2c3bf2104923ea53274de9cbdbe54baaa0704ddf. 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/GBF078231401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d53f442c22906877cea3484e3376236d8dc9012d77a8cef6b344ba131c6b86. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078231414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8353516345edce31be7de7a9d3fe7fb6078a80a3bf1b6172b505b443320f14aa. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBF078231402.
Jenufa / Act 2: Mamicko, mam tezkou hlavu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a133aa515348c232309a93b764a2975c319daa0783b4b55f8a12b2b8bc0efe. 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/GBF078231415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcb8916b475dc1205643300a576fd568c760199d4d6449aeded545bfae5fe31. 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/GBF078231416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1772fbce2595bd9cc8d1f345e76f70a1bcde9e16075e675bb7e1d476c205ba3e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078231404.
Jenufa / Act 3: Neni ti teskno, Jenufko?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cbef6e34930125bf497a8e99f13cd7177b62069eaa2192368826ce50734817. 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/GBF078231418.
Jenufa / Act 1: A tak bychom sli celym zivotem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b274a18927933bd784c1a7d86f6bc01d001884cb2a199b8daf900488330f53. 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/GBF078231406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe053610a7b110d713cb5c1bb3365cbd4b5523fd54641337cba039a68b44b263. 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/GBF078231419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a3c5f04dd0a75f8743e4d541414d5ef3b41d749892e0ed3b1df9e4a2784e59. 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/GBF078231407.
Jenufa / Act 3: Vidis Laco, já to tusila
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebeccc9d27f068b093c40cda8d6dbbe42519a3a946a58e6975df87da1969ede. 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/GBF078231420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a6205edbd3ed4d2e80a4176ebbb64d3095ccc0b32642be443b823abef0ac23. 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/GBF078231421.
Jenufa / Act 2: Necham jeste dvere otevreny
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76fd3de24756149ebecb70c0fe84375dbe0711ab509303adb3489103794a1a9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBF078231410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5456a975eec8606bb13dc4a721787c0be35bef4cdfc5af638d7ab569e8b64230. 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/GBF078231424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13bc5ca43b5141202bbf0b2756a4e85bac773aa40fd29189c3d8315f0ca839d. 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/GBF078231412.
Jenufa / Act 3: Vstante, testounka moja!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc4d399a8da9ac491865ef9ee5dc31dc781a3959399f85c9275125d53ce98a2. 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/GBF078231425.
Jenufa - Orchestration by Karel Kovarovic / Act 3: Odesli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ca76737e9863aa9fda8f86fdf11c2915e556a13efa1dcc6676470a8ad1264e. 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/GBF078231427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43d3de2e72f132828360ed2dbfd4b0fdbfbd59d2bd9e0f11a95a16c55e37c1b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078231403.
Jenufa / Act 1: Jak razem vsecko to Stevkovo vypináni schiplo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7248ac87670753a2bcd8d57e13866c0ecd8c102ca98161f0440e6e468d82ea. 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/GBF078231408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd58530db0fbe421cd283d094abfebf670c19224aa6b363c8ebee16707a9dac. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078231422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d293bb5846e11e3e8aee2b80ec0e039237360f4cf4c55dfcaf362da0bbfed27. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBF078231423.
Zelenka: Magnificat, Sacred Compositions For Soloists, Chorus And Orchestra
Martinů: Czech Madrigals - Britten: Cantata academica
Koutník: Requiem in E Flat Major, Kriminalista nevinný
Prigozhin: A Word About Igor's Regiment - Dambis: Songs About The Sea - Salmanov: Powder Puff
Ančerl Gold Edition 21. Vycpálek: Czech Requiem - Mácha: Variations on a Theme and on the Death of Jan Rychlík
Ančerl Gold Edition 32. Stravinsky: Les Noces, Cantata, Mass