1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x079d98c995d8106ee1e338c04cd79759e049f782dc5b46cd3b46a5c89415469e. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/140ca750-8ee3-4930-b7d8-ce325fa9ac3b.json and https://artists.proofprofile.net/proofs/artist/140ca750-8ee3-4930-b7d8-ce325fa9ac3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 → block OTSBitcoinBlock must exist at that height 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 0x2595aa00ffda7809cee6b178fb9e5999bd53fd8b69933c25fc32a99e58258f63. 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/GBF079810800.
Rusalka, Op. 114 / Act 2: Jarku, jarku, klouce milé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfc48e0003088b78badda2671f18fd85a160a5abf8750ceb03302e7633b7a1e. 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/GBF079810930.
Rusalka, Op. 114 / Act 3: Necitelná vodní moci
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39baa2d83f6f3c3b5d5412de2d431c7c94db9c92a214cc43d3bffe78b90fdf5e. 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/GBF079811020.
Rusalka, Op. 114 / Act 1: Hou, hou, hou, stojí mésic nad vodou!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227d909b7a33aa7dc6bb856e89fb47b32d2c3fac70c39d82111db07e69537679. 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/GBF079810810.
Rusalka, Op. 114 / Act 2: U nás v lese strasi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62ab0d8d7fbf259c3915901b5a4eb692328705203731d9332aa1536d6f30e12. 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/GBF079810940.
Rusalka, Op. 114 / Act 3: Aj, aj? Uz jsi se navrátila
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91696a81a42993963763d960f0f75555257477ada4f707b96cdebbd23423ae37. 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/GBF079810820.
Rusalka, Op. 114 / Act 2: Jiz tyden dlis po boku
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f27512694b38a0c7753618d851a5072dbcb9124fdb4d052ba0b811f5d91db5. 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/GBF079810950.
Rusalka, Op. 114 / Act 3: Vyrvána zivotu v hlubokou samotu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf1b995529b258d72942bae63eeb1745bd8fc463cb808fa7612979221e00215. 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/GBF079811040.
Rusalka, Op. 114 / Act 1: Hastrmánku, taticku!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb557c85edd8c6b6b507d47e9d42243428cfe7cfafc6bd21cbad028ab784ceca9. 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/GBF079810830.
Rusalka, Op. 114 / Act 2: Zda na chvili princ vzpomene si prec
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2018a409b11d5f7079bdf11b2fd796dabc066c84bce2bf18999d1595ff51f972. 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/GBF079810960.
Rusalka, Op. 114 / Act 3: Ze se bojís? Tresky, plesky
Rusalka, Op. 114 / Act 1: Sem casto prichazi a v objeti mé stoupá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea7f66d9c1379786f96dd9d9e8b1b1b0e0f37e6932c5f7c9f0253da60c3635f. 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/GBF079810840.
Rusalka, Op. 114 / Act 2: Slavnosti hudba - balet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b28478f11ab666cabbd9ccce994e63d6e906e5cc7db22da69085a286f1ec00. 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/GBF079810970.
Rusalka, Op. 114 / Act 3: Mám, zlaté vlásky mám
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a164f85063dee96349521efbb81f79a9288b53e36906fce2b447ef7550f8aba. 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/GBF079811060.
Rusalka, Op. 114 / Act 1: Mesicku na nebi hlubokém
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78b367dedd42abf7f8a14dc481a5bfc5f7b63f16b1b53fbd95820824c40106f. 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/GBF079810850.
Rusalka, Op. 114 / Act 2: Cely svet neda ti, neda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7749c3d95a01dc4b6c5196f3ac1eb8f3174b7bacb246a0739a7536b627e6c2. 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/GBF079810980.
Rusalka, Op. 114 / Act 3: Bílá moje lani! Bílá moje lani!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc38d83dd141f6d1dee63b1c974bb35eeae9c06d22ac2d04c2c879250205cf33. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBF079811070.
Rusalka, Op. 114 / Act 1: Ta voda studi, studi! Jezibabo! Jezibabo!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10077265020bf123a0373c3e74074a031c72bbeb363386d4d913b844e7944942. 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/GBF079810860.
Rusalka, Op. 114 / Act 2: Kvetiny bile po ceste
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4ea290df9b0498309ea6ed117260bda1c44703e5dd32bf40f2a2dc2b388e2d. 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/GBF079810990.
Rusalka, Op. 114 / Act 3: Milácku, znás mne, znás?
Rusalka, Op. 114 / Act 1: Stalerá moudrost tvá vsechno vi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4955764d4e07325a8fce4c85a99d0cc20c04330cb6b6f95c8f846c1432a9a834. 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/GBF079810870.
Rusalka, Op. 114 / Act 2: Rusalko, znas mne, znas?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72886db17f5be5260eef6aae99409b54c0b124553cd5bc6bc7f874fa40d76a94. 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/GBF079811000.
Rusalka, Op. 114 / Act 3: Líbej mne, líbej, mír mi prej
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685a155bc4b694adbb7fbd314cf1bf2a4a200b7b1f7ed5d32b42dedc15eb3b96. 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/GBF079811090.
Rusalka, Op. 114 / Act 1: Tvoje moudrost vsechno tusi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0385831f35b84c2bfed83c929827627452e8f34fa647fa8543f0c8abb15e90fc. 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/GBF079810880.
Rusalka, Op. 114 / Act 2: Vidis je, vidis? Jsou tu zas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44ded0478fdfa5dd47b3f92fe5a718d6d98cd0b3a6bfc93250dbc30b2daecd3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBF079811010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303785511ce0451228c2785d60503b080edadf5b105b728f36a2fb84d85451d4. 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/GBF079810890.
Rusalka, Op. 114 / Act 1: Jel mlady lovec, jel a jel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d2b6b3f3c99eaeadd3188f3b93616155a26ecd6dcdb6ce5b6e1e02c2195a7a. 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/GBF079810900.
Rusalka, Op. 114 / Act 1: Ustante v lovu, na hrad vrafte se
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23471cfa02be88fa2b85bcef2891c4c8fb4d708496138d342976648211c4c831. 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/GBF079810910.
Rusalka, Op. 114 / Act 1: Sestry, jedna scházi z nás!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf884d98eee4b50f9c2ff0e61bfb7c55d4b634d6b4e571630d553ea6193085e. 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/GBF079810920.
Fišer, Bodorová, Mácha: Prague Guitar Concertos
Sonata per Leonardo for Guitar and Strings
Tre canzoni da suonare per chitarra ed orchestra d´archi: No. 1, Canzone d´apertura
Tre canzoni da suonare per chitarra ed orchestra d´archi: No. 2, Canzone d´amore
Tre canzoni da suonare per chitarra ed orchestra d´archi: No. 3, Canzone di chiusura
Christmas Concertino for Guitar And Strings: I. Allegro moderato
Christmas Concertino for Guitar And Strings: II. Andante
Christmas Concertino for Guitar And Strings: III. Allegro
Dona nobis lucem per voce, violino, chitarra ed orchestra d´archi
The Stubborn Lovers, Op. 17, B. 46, Act I: Overture
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 1: Well Then, It´s Settled! (Vávra, Rolník, Říhová, Vdova, Kmotr Řeřicha)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 2: Pressure Toník, Ha-Ha-Ha! (Kmotr Řeřicha)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 3: Look There, and No Mistake! (Vávra, Rolník, Toník, Jeho syn, Kmotr Řeřicha)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 4: Ha-Ha! The Old Boy Already Knows! (Říhová, Vdova, Lenka, Její dcera, Kmotr Řeřicha)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 5: What an Outrage It Would Be (Lenka, Její dcera)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 6: Lenka, Why Ever Do You Look so Sad (Lenka, Její dcera, Kmotr Řeřicha)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 7: What´s Up with Me (Lenka, Její dcera)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 8: But That´s Impossible! (Toník, Jeho syn, Kmotr Řeřicha)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 9: My Father Marrying Lenka (Toník, Jeho syn)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 10: Mistress Říhová, Good Day to You (Toník, Jeho syn, Říhová, Vdova)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 11: Look Here, It´s Lenka (Vávra, Rolník, Toník, Jeho syn, Lenka, Její dcera, Kmotr Řeřicha)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 12: Ha-Ha! Sweet Maid Lenka (Vávra, Rolník)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 13: Ha-Ha! There, Neighbour (Vávra, Rolník, Říhová, Vdova, Kmotr Řeřicha)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 15: O Stupid, Stupid Me (Toník, Jeho syn, Lenka, Její dcera, Kmotr Řeřicha)
The Stubborn Lovers, Op. 17, B. 46, Act I, Scene 15: Hey, Hey, Hey! What Delight to See Them Embracing (Vávra, Rolník, Toník, Jeho syn, Říhová, Vdova, Lenka, Její dcera, Kmotr Řeřicha)
Love Songs, Op. 83: No. 1, The Happy Flower Unfurls Not That´s Long Our Love´s Desire. Andante
Love Songs, Op. 83: No. 2, Death Dwells in Many a Human Heart. Moderato
Love Songs, Op. 83: No. 3, Now as by That House I Tread. Allegretto
Love Songs, Op. 83: No. 4, I Know That in Sweet Hopefulness My Love May I Give Thee. Poco sostenuto
Love Songs, Op. 83: No. 5, Over the Land Reigns a Peaceful Repose. Allegretto grazioso
Love Songs, Op. 83: No. 6, Lonely in the Wood I Stand, by the Rushing Brook. Andante
Love Songs, Op. 83: No. 7, In the Sweet Power of Thine Eyes. Andante
Love Songs, Op. 83: No. 8, My Only Dear One, My Dear Love. Poco lento
Erotikon, Op. 24: Give Me. Molto sostenuto
Erotikon, Op. 24: In May Allegretto grazioso
Erotikon, Op. 24: In Love Have Faith. Adagio
Erotikon, Op. 24: Sweet Enchantment. Adagio
Six Songs, Op. 12: My Love Is Like a Red, Red Rose. Quasi allegretto
Six Songs, Op. 12: The Cockerel. Allegretto
Six Songs, Op. 12: The Dove. Andante con moto
Six Songs, Op. 12: A Cure for Fathomless Love. Andante
Love Songs, Op. 96: Keep not in thy heart hidden yearnings. Andante moderato
Love Songs, Op. 96: Each day it comes, then goes again. Moderato
Love Songs, Op. 96: My heart, a free bird. Andante con moto
Love Songs, Op. 96: I plucked the flower of the world. Andante moderato
Love Songs, Op. 96: My love, my spirit longs to meet with thee. Con moto
Erotikon, Op. 46: Journey from Morning. Andante semplice
Erotikon, Op. 46: Twilight Dreaming. Lento mysterioso
Erotikon, Op. 46: Eulogy. Maestoso, ma con moto e rubato