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 0xa1f6752d21f2d275a9f950fdc6b6c52302dcc57d48068ca62af5289640e89a72. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e01cabaf-f678-4903-87c7-4079bb33074c.json and https://artists.proofprofile.net/proofs/artist/e01cabaf-f678-4903-87c7-4079bb33074c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
6 Characteristic Pieces, Op. 1, JB 1:35: No. 1 in C Major, In the Forest. Moderato
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 0xec4928bfbcb612ee9bb19239defd43e4c28c16067a6751096390ce2d3e1ea4c7. 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/CZA161300592.
6 Characteristic Pieces, Op. 1, JB 1:35: No. 2 in C Minor, Rising Passion. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf215f13b0c98047a5b9eb741556d5b9ca59a6cb44e5eabcff2f1d78141e87309. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CZA161300593.
6 Characteristic Pieces, Op. 1, JB 1:35: No. 3 in G Major, Shepherdess. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178acbc14722ff108ea3bf3335fc64031bb954b9dac166311f64eca283b6b665. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CZA161300594.
6 Characteristic Pieces, Op. 1, JB 1:35: No. 4 in G Minor, Desire. Andantino piu moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4234244a6480885dee9d9c46cd081aeee8b7bbadd4415bf391bc49f6accef867. 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/CZA161300595.
6 Characteristic Pieces, Op. 1, JB 1:35: No. 5 in D Major, Soldier. Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49e70c0f89fadfa02bece0847e5a0706243c920ceee16471704ef9e06b8cabe. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/CZA161300596.
6 Characteristic Pieces, Op. 1, JB 1:35: No. 6 in D Minor, Despair. Presto rubato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a46644c8f4c82fe7255a2cbb7fc3d750a5304a0520df05b506f41987552957. 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/CZA161300597.
Woodland Feelings and Impressions in F Minor, JB 1:31
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10e416eb8cb415865ba3d74f558ffee0267e4c7ffd03634d1d3e894ad17d24c. 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/CZA161300598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae70ef2681cab3a6e38ab0addc2fa1dbcbe96cc124b581ea83369b68e8a57e09. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/CZA161300600.
Album Leaf for Kateřina Kolářová in B Major, JB 1:20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840ffc706328d69d36c50639b9dc16f925f9b4861c155513bd87194edec77ade. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZA161300602.
Album Leaf for Elisabeth Felicitas Thun in A-Flat Major, JB 1:25
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be34794f5365ea7765ceb4cd40f5ed8a1b4a13775e2612ff0a53f02a6b962f6. 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/CZA161300603.
Album Leaf for Josephine Finke in E Major, JB 1:21
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7f90e912b040539c1027ba2fa5c0e92ee86adce69dadd445e5e83733f192d7. 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/CZA161300604.
Album Leaf for Jean Kunz in C Major, JB 1:22
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106a0f61a28670be81be0db1e1b38cbcf22aceb81978b5d563f1fe0e8386e415. 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/CZA161300605.
Album Leaf for Vazlaw Ulwer in E-Flat Minor, JB 1:23
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbe615d1a15a80139116bd79f29dad8b66fa9778accd2094065fab5e48bb98c. 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/CZA161300606.
Album Leaf for Marie Prokschové in C Major, JB 1:81
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b81ddc8b918d5cb82b98ab34dae7300129c56e8db9947e5fbddc7fcdebc515. 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/CZA161300607.
Memories of Weimar in A-Flat Major, JB 1:68
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1a8d46493d041615aaa120c43917aec7ccb390aff6d88885420a0c0807a082. 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/CZA161300608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcff7b837d511e2b82a36e20ba0d454a2ce377908f23330e1254f24b1104032. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA161300609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb802ccbbcd8cd5f192811cc7ade7ca40442ad088610ad5abf21c4f1591d670. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CZA161300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba9cd28abe7fda3d775aa93915612e5d3564c638a560bd7aceba02cee4878a6. 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/CZA161300611.
March of the Prague Student Legion in F Major, JB 1:36
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b2fc1dbd6d757d9fafee3e1b900d2f4959b203eb42d4be0ad6435c59470fee. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA161300612.
Brahms: Concerti for Violin, Cello & Piano
World War I - Centenary 1914 - 2014, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd028ea5a5fc243905dfb6ab130c3ca7a3185af58f97d089a7297736a9fb7162. 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/DEB639906608.
Bagatelles and Impromptus, JB 1:19: No. 7 in A Major, Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd547b8e29ce4a35b850cdb4925618dd159f80bf8037214bbfac9e0a8c9744b0b. 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/CZA161101585.
3 Polkas de salon, Op. 7, JB 1:60: No. 1 in F-Sharp Major, Allegro commodo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9223e23f98e825d7fe2a8b0b4d9df68f72ba3dd60430507a721cb65eedaef5a6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160900049.
3 Polkas de salon, Op. 7, JB 1:60: No. 2 in F Minor, Moderato molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3681959bd2c12c573ef7f5cc90d52554b13fa2200026b74490a76c8369664bb. 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/CZA160900050.
3 Polkas de salon, Op. 7, JB 1:60: No. 3 in E Major, Allegretto ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95583486e35a1935071295306fcccc599a6c267f1308f983325303a4f4a4e5c. 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/CZA160900051.
6 Album Leaves, Op. 2, JB 1:51: No. 1 in C Major, Prélude. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71092f9e68c17b7f4b6302c10aa230c674156ede7a62b7bb7096f78a696ec27. 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/CZA160900137.
6 Album Leaves, Op. 2, JB 1:51: No. 2 in A Minor, Chanson. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15da41af933bc595d026b47b7894c39b7f36586a5c09c1b626ca9dd07551d017. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZA160900138.
6 Album Leaves, Op. 2, JB 1:51: No. 3 in G Major, Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa757af4556823ad8be058eae2cc6b69c018a847a05537aa4c5c7b8736cb9aa22. 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/CZA160900139.
6 Album Leaves, Op. 2, JB 1:51: No. 4 in E Minor, Allegro commodo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c965bcb4673a4ddd7ccfd0ebfcea97155c878193efd4c5d6f00b437fdddd30. 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/CZA160900140.
6 Album Leaves, Op. 2, JB 1:51: No. 5 in D Major, Moderato con anima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e878bfba7e43e397dbb1d980ac3e1aae5906b269e61d62d3de8a6aa2debed8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160900141.
6 Album Leaves, Op. 2, JB 1:51: No. 6, Andante ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9fce9a68d54713461887fc9303476d52f6677969344899c7498ff92428490d. 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/CZA160900142.
Charakterstücke, Op. 3, JB 1:65: No. 1, An Robert Schumann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f677db755c82a038c9d2ce74407f15ddc4841fe6a5ca290939cd0ffcb1d38. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160900057.
Charakterstücke, Op. 3, JB 1:65: No. 2, Wanderlied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69c5f4bd7c57504cacbf5fa505442538395f81d9c878e4a240b0b72e1a1e869. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160900058.
Charakterstücke, Op. 3, JB 1:65: No. 3, Es siedet und brauset un sicht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0958bc1dbc168bc16af6e783e93b6549a200d79ed9ffd26af65e08b7f7a58e84. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZA160900059.
4 Sketches, Op. 4, JB 1:66: No. 1 in F-Sharp Minor, Prelude. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22abac4e9c592d24cd051fce53eff036c172ece331882b5b65d826c99620eae. 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/CZA160900061.
4 Sketches, Op. 4, JB 1:66: No. 2 in B Major, Idyll. Moderato ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6b1dd7c6f9a0e48fe1fef54dab7f72e00f74feae74ec10f816441f87125917. 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/CZA160900062.
4 Sketches, Op. 4, JB 1:66: No. 3 in A-Flat Major, Souvenir. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda67e3d4efc9b4335762774e397b69ae2cb859489bd12bfbbbff3b3db33d6cfb. 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/CZA160900063.
4 Sketches, Op. 4, JB 1:66: No. 4 in G-Sharp Minor, Relentless Struggle. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b560bc017a77d0ffe530e6d24e94bac5619f170690a4eaf871901fdcc2e97f3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160900064.
4 Sketches, Op. 5, JB 1:67: No. 1, Scherzo - Polka. Allegremente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80fb457635b00b1605c1c3c41ccfd7d7b43b994f83e118aa9ca299a2aadd97c. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/CZA160900066.
4 Sketches, Op. 5, JB 1:67: No. 2, Melancholy. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f56ff9d853b8734dfa1777941adc2885c8630960e1773efbb1aeb029b1d5a53. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZA160900067.
4 Sketches, Op. 5, JB 1:67: No. 3, Pleasant Countryside. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30064ce45a0a08c02419262068844dd4eb8ff2a4c73202edc36fcdd10552a749. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160900068.
4 Sketches, Op. 5, JB 1:67: No. 4, Rhapsody. Vivace ed energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6966682881d31c931adc51d549357302d80d60500afa0cdc57d9e81f1ce32ae1. 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/CZA160900069.
Three Poetic Polkas, Op. 8, JB 1:61: No. 1 in E-Flat Major, Vivo
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Three Poetic Polkas, Op. 8, JB 1:61: No. 2 in G Minor, Meno allegro
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Three Poetic Polkas, Op. 8, JB 1:61: No. 3 in A-Flat Major, Allegro
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Treasury of Melodies, JB 1:49: I. Preludium. Lento
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Treasury of Melodies, JB 1:49: II. Capriccio. Vivace
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Treasury of Melodies, JB 1:49: III. Finale. Allegro vivace
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Brahms: Cello Sonata No. 1 in E Minor, Op. 38 & Cello Sonata No. 2 in F Major, Op. 99
On the Seashore in G-Sharp Minor, Op. 17, JB 1:80
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Fantasia on Czech Folksongs in B Major, JB 1:83
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Korte: Sinfonietta, Songs of Troubadours, The Story of the Flutes
Korte, Eben, Sluka and Trojan: Replies from Ancient Times
Členové Plzeňského rozhlasového orchestru
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Jan Hugo Vorisek: Symphony op. 24/Zdenek Lukas: Piano Cto. No. III
Martinu: Songs for Mezzo-Soprano and Piano
Marek: Sonata Op. 13, Suite De Quatre Morceaux Op. 18, Petite Suite Op. 36a, Canzone Solennelle and Gavotte Op. 18a, Rondeau Op. 33
Beethoven: Cello Sonatas Nos. 2 & 3 - Variations in F major, Op. 66