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 0xa23d2abba97d48ac952d79afefacf5fe042868e3472ac16342333ffe9697aa48. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cb57532-2c68-42f0-9a3c-4a51046071c5.json and https://artists.proofprofile.net/proofs/artist/6cb57532-2c68-42f0-9a3c-4a51046071c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vivaldi/Duo Vivid: The Four Seasons (Transcription for Piano Four Hands)
Franz Liszt: Sonata in B Minor and Other Piano Works
R. Schumann: Kinderszenen, Op. 15, Waldszenen, Op. 82 & Arabeske Op. 18
Sonatina No. 1 in C Major, Op. 36: I. Allegro
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 0x416e6051917ed7f97b4b137de19fc95e10c64b72d7b0af6071e899a01e06b8d5. 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/KRB872110001.
Sonatina No. 3 in C Major, Op. 36: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cca72b32c2703354fe47cb3f299d69d9f033fa74b3c91e428e356fe63cbd59d. 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/KRB872110009.
Sonatina No. 4 in F Major, Op. 36: II. Andante con espressione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfc2ab4a86677431f553f33114a715f9138c2f00c16ef9cf1dcf1d56d7c0e38. 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/KRB872110011.
Sonatina No. 4 in F Major, Op. 36: III. Rondo. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d46252fc058eb1f51cd91837bb8d14417a9339be1a2708b5528c93a15e06a37. 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/KRB872110012.
Sonatina No. 5 in G Major, Op. 36: III. Rondo. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98341e140c9cfdd8ce832a5212f04c798d397641f416a590578b8021a395ea38. 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/KRB872110015.
Sonatina No. 1 in C Major, Op. 36: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0745ee826fe32f948b654bc6ca91ea9b4e65ce294acf8ff3e7c60f8dac041eb0. 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/KRB872110002.
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
Sonatina No. 1 in C Major, Op. 36: III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6be01251b3a7e9dbac4f97836b176371d419f5fd93da93e21925a4e4450037f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/KRB872110003.
Sonatina No. 2 in G Major, Op. 36: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3764452f91b4f9047dc1788d0ea63da174a2f643559e5615d9328acf475236d1. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/KRB872110004.
Sonatina No. 2 in G Major, Op. 36: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687d8b0d99221e87e9d01f96f909cfe448246a99fcda765ceb3a2ccf51abd13. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB872110005.
Sonatina No. 2 in G Major, Op. 36: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb967e27c05520418a3964c342cfbf450f6061cd3d5b0e76e1ceaa5d1817df5f6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB872110006.
Sonatina No. 3 in C Major, Op. 36: I. Spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a68239a8163652469b5e5fcd61c5f36f53d1de0635ac2e49f43d3c1550d2f98. 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/KRB872110007.
Sonatina No. 3 in C Major, Op. 36: II. Un poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd98d7f09113fae072813c087745cdd8aca161366508335bc09d28fa74355e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB872110008.
Sonatina No. 4 in F Major, Op. 36: I. Con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9db6212850f2946473ce94236dd1768db906da94195b2677e117c2e328d8b8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/KRB872110010.
Sonatina No. 5 in G Major, Op. 36: I. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db53b1a4b7c25410744e57dd34817c10041db9f59d78c1593e2771bde6b570e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB872110013.
Sonatina No. 5 in G Major, Op. 36: II. Allegretto moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0572e37a8c49ad1f8afd67ae672a6ea84eede65dd98db7ec342fe0f4e24fee68. 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/KRB872110014.
Sonatina No. 6 in D Major, Op. 36: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d9325541be42672467538d6eee90ba8bb39e377d0c1f4ad25ffb3dab935f07. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/KRB872110016.
Sonatina No. 6 in D Major, Op. 36: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9488f6d88074665f7613e442ccd824ba0e4ec67ae8e0b13509eb313a73df9d09. 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/KRB872110017.
F. Liszt: 6 Grandes Etudes de Paganini - Liebestraum "3 Noctturnos"
F. Liszt: 12 Etudes d'Exécution Transcendante
J. S. Bach: Partita No. 2 in C Minor, BWV 826
Chong Park: Schubert Serenade Piano Transcription
Franz Schubert: 4 Impromptus, Op. 90, D. 899
Chopin: Nocturne No. 17 in B Major, Op. 62, No. 1
Chong Park: 6 Little Variations on the Theme of Ah! Vous dirai-je, Maman for Piano Solo
Chopin: Fantaisie-Impromptu, Op. 66 & Etude, Op. 10
Liszt: Venezia e Napoli, S. 162 Supplement to années de pèlerinage II (Revised 1859 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c181265d8d31405a51b836e3e30c3c47fec28b140fdf92b872228e6df46db6. 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/KRD981900271.