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 0x025c2ffba7cc69833b00357270264f228cdfd3b402694372b5e7d08e29a1eb97. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb8e9edb-da1f-44f2-af33-90de574b88b0.json and https://artists.proofprofile.net/proofs/artist/eb8e9edb-da1f-44f2-af33-90de574b88b0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
24 Préludes, Op. 17, Cahier I: I. Andante Religioso
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 0xc86374e5570fa7cca32f5cd70883ce104413221edff51329e50254496390938f. 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/NLY332202173 — a six-check JSON result.
Balakirev, Glazunov, Kosenko: Russian Piano Sonatas Vol. 1
Violin Sonata No. 2: III. Burlesque. Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16df0028bf3b067b965d658aa3fa86d916dd65599a36fad1ec0a1e8696d9307b. 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/HKI192311105 — a six-check JSON result.
Images from the Great Siege (Version for Orchestra): IV. Solitary Rider
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff5732c0d153e5362bbbd27aa3fd01e3eff72dd3ec4eba530daa99069283106. 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/HKI192014404 — a six-check JSON result.
2 Dialogues with Postscript (Version for Piano & String Orchestra): No. 3, Morning Serenade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50479e2ed32accb8edcfb9c0505d609aef14e3c48e004f379a567c994148d74e. 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/HKI191628903 — a six-check JSON result.
24 Preludes, Op. 53: Prelude No. 5 in D Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9f3eb5df9d95a8e904241f978ca3df445baf6fe6c4967796f50f62a3346a08. 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/HKI191063413 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa696824ce4ce33ed2c162d6503d2b5d6d9923535fcc3b5cad3361a9c78a5ca. 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/HKI191403405 — a six-check JSON result.
Consolation: Forgotten Treasures of the Ukranian Soul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459d01f0c0930b267ccdf54659673587e58cacff4c6f968183af67fb21fa3382. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1622010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd628ab31872357daef6f73adc0f69b22e100b6eb0a8186771744d66f3b77497b. 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/SEAEX1622020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe7810757cd9f63e4308b52d9de7bf7f08b4e111adf1a2e1e41438216de469e. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/SEAEX1622030 — a six-check JSON result.
Album from the Summer of 1901, Op. 39: No. 3, Élégie. La tristesse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd0a4985b2fa23f9a0470b0185c6bbf0cf464efbfb94ce61a12623e6e1c312a. 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/SEAEX1622040 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290682964bee85f6b9c325cb1a19398c21e8d6916d6d40edd5df6b7bcb101967. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/SEAEX1622060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3fecf078cbe343cda9ad93887a087d3e272e93cc69b02408b35105545605dd. 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/SEAEX1622070 — a six-check JSON result.
2 Preludes, Op. 7: No. 2 in B-Flat Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9b998753daf8c821e4373b0f3be26c764870b60b3d557ea9a2220b3e864bc5. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/SEAEX1622090 — a six-check JSON result.
Shevchenko Suite: I. Andante sostenuto - Poco più mosso ed agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093a12b2757bcb0ebbc6a45e9a9c56e3ef5969a9613bba66420f55e887b389c2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1622100 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e47c49a9156ad2aea258fd4adcbb819d523c249d4356a5f8ff129100a2fb1f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SEAEX1622110 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c5379d4c8211ea73068054be5623a68463be1223f95d838e9d4bc55301321. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEAEX1622150 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ea37ae5c2b31b3a0c5782798b6b0bcc8d8bf98c66ecf7b7ed67a64e4238556. 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/SEAEX1622160 — a six-check JSON result.
3 Carpathian Dances: II. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f2f6d255956956077fc1ecd76a5fbd2aac17701d975d5a42338606b61e026. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1622170 — a six-check JSON result.
Prelude, Op. 1: No. 2, Allegretto pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dc6ef99bf6c37a6e993204518ea4e7cf06c53013a2d01a1982d73b8dfa656a. 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/SEAEX1622190 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e022c6de31cdd36b8e939a3cabf75944a9865eeacae208292a522b4fb9078c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1622200 — a six-check JSON result.
24 Children's Pieces, Op. 25: No. 15. Lullaby: Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510d0ad972c9e47dfa3ec8d1910223550e3419adf1244c4443150b7e35ecd007. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US8271500516 — a six-check JSON result.
Kosenko: Piano Music, Vol. 1 - 11 Etudes in the Form of Old Dances
11 Etudes in the Form of Old Dances, Op. 19: No. 5. Sarabande in A Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfb0bfb939930c833cf8cc572b1ad406a1c15ea322c6aad8ea3731ed8e7fc76. 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/GBJZY0600029 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9b27ea80c186039fe47a9301060ac005d7a8cfa00890e961f39e1de61620be. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG22375721 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a938a5c0679c1858dd79e4b4c79aec37eec35237ab119edd02c66ecd2a237d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG22375731 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7f4d9e8999804f26778da4bda93f11edf60b7d21e4ca5a11a920247109adb8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2141577 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf4901ce76a53a21de7517e1789d9c582912a916ab44ca4a6e89c7aafe6cbef. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42206850 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941b6bebd6785316671f235779325ed53695406f40057d116d4b62a7ffea6a8f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZFZ62217356 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff41cf962db075d43eb6a186f25a607e3d10ce2b841cda4429f19e426fe4917. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2141565 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d1ba9029dfcdd47874162a3d02dca8394510095ab7d3d451b279cdd27642ef. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZK6L2204203 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45e5eaf0fe88710565abc87739d23279a8490d221453fef6a12f7d62d55931c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZFZ62217360 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45fa61648995b29a97e457544dedb127814152c305d3c0a36caedd902e684a6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2141566 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79398b39cf56a2f634c8298cdea9330c02c8749645bf9eb5090a5e205e9880c8. 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/QZNWX2141563 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c9f1f4182e99ad5574b28ef7cb9b61ffe92c437f1a49298052432a6fec736c. 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/QZTB52281823 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6f5340765deb490fec84e53551255a04b901b1375444a1b5f79563a9010a1b. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62217353 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73e8c8592c771aa6690f2951149df21c415e2c678bc96a6c50321475600434c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2141578 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95193269f94e708c99e4196d69509ed0d4d529e585d6530708e220f184f17ef0. 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/QZNWX2141580 — a six-check JSON result.
4 Préludes, Op. 22: No. 1 in G-Sharp Minor, Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6994b599c18ac4e319a937eabcbb656c44e5099e0361750015dc20a18f4db6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBYDS2100291 — a six-check JSON result.
4 Préludes, Op. 22: No. 3 in B Major, Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5d1f055f6dc4e8649f6b000f5bb48640ea0acf2b97b27876f1c74267147506. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2100293 — a six-check JSON result.
3 Preludes, Op. 4: No. 2 in F-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378806ac53857f55fadc4f51e3c442aba6404901401ac8e1df1ba08439baf13b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEFG21519502 — a six-check JSON result.
Nocturne-Fantasy in C-Sharp Minor, Op. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fca75f040caef31348fcaaa87a35b8668b18d99fc1dda29dd48b46a8e84d97b. 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/DEFG21519504 — a six-check JSON result.
11 Etudes, Op. 8: No. 2 in B-Flat Minor, "Melancholic Etude"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b70dc99aa36d0bc21115db6b70ec717f72a8d6e97f00c1d795597c0d5e99dc. 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/DEFG21519505 — a six-check JSON result.
11 Etudes, Op. 8: No. 8 in F-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c73c0da1a44f83fb61f401f81b651e03b3ceffe3a8e4c23f3780ecbe1464ae. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DEFG21519506 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd74a1165fd78bfdd3d3988b76c769b335398593b07d7cc0d0baada3ecf2d355. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEFG21519507 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5774297f750846c130e54d64fc9a9988a3c11d4c0f10dc662ea671cdceaa54ae. 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/DEFG21519509 — a six-check JSON result.
Smile !!! Works for Double-Bass (Arr. for Keyboard and Double Bass)
14 Romances, Op. 34: No. 14 in C-Sharp Minor, Vocalise
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2 Melodies, Op. 3: No. 1 in F Major, Moderato assai
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Kinderszenen, Op. 15: No. 7 in F Major, Träumerei
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Suite from Incidental Music for the Film "The Gadfly", Op. 97а: VIII. Romance (Arr. Rodion Azarkhin)
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Anthology of Russian Romance: Boris Gmyrya, Vol. 3
Klassik aus der Ukraine/Класика з України