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 0xc773a11f5e02576aa2f98513510331679e5a40e075e9a77454ad30d3ce85cca3. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/994f32f4-6196-4ff4-b165-fe9180d7ff81.json and https://artists.proofprofile.net/proofs/artist/994f32f4-6196-4ff4-b165-fe9180d7ff81.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Bartók: Sonata For 2 Pianos And Percussion, Sz. 110 / Ravel: Ma mère l'oye, M. 62; Rapsodie espagnole, M. 54
Sonata For 2 Pianos And Percussion, Sz. 110: 1. Assai lento
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 0xce3c5f2d0af88966c39277c9069c9044130dbf51e9c688bdf99fc580bb1b3318. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEF059303231 — a six-check JSON result.
Sonata For 2 Pianos And Percussion, Sz. 110: 2. Lento, ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7815886f81ec1b5decc6a2be17b0ac52d7d8bf5418de6c6cce96181bce6f8895. 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/DEF059303232 — a six-check JSON result.
Sonata For 2 Pianos And Percussion, Sz. 110: 3. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2397aed5969ce073bf2c72ed189c4046c014f9f594dd944133a8518145495827. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059303233 — a six-check JSON result.
Ma mère l'oye, M.60: 1. Pavane de la Belle au bois dormant: Lent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad06ad34ca2b815167c6ad390f94677038c46f887bf9832d48bdf77cf88138b. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/DEF059303241 — a six-check JSON result.
Ma mère l'oye, M.60: 2. Petit Poucet: Très modéré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf372818532da19b0e25d7dbb0184b4758b808d8fc7cfc3ea7444cc32de50c8be. 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/DEF059303242 — a six-check JSON result.
Ma mère l'oye, M.60: 3. Laideronnette, Impératrice des pagodes: Mouvement de Marche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc446ee6779c8f4323921ffc20d74d7ad115fb5c7b7a729f4abb959770e10d66d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DEF059303243 — a six-check JSON result.
Ma mère l'oye, M.60: 4. Les Entretiens de la Belle et de la Bête: Mouvement de Valse très modéré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f52e9d6c7471db811c86a1d705a4d9e70e8e96fcc2942936a8cdc3d6c6b138. 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/DEF059303244 — a six-check JSON result.
Ma mère l'oye, M.60: 5. Le Jardin féerique: Lent et grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089d32a2f5af786ae16c6a342995a90d825f57037918cab77ced8d088df3f6eb. 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/DEF059303245 — a six-check JSON result.
Rapsodie espagnole, M.54: 1. Prélude à la nuit: Modéré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eff2501b5746f4c3a8893640118dda9d9771fad46d989a4ad4114e3e1249045. 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/DEF059303252 — a six-check JSON result.
Rapsodie espagnole, M.54: 3. Habanera: En demi-teinte et d'un rhythme las
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077d97b8cc8c7662332be2494cc3404c047dab29bbdf77695950ac00667f4f15. 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/DEF059303254 — a six-check JSON result.
Rapsodie espagnole, M.54: 4. Feria: Assez vif
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400fc529a2bd9db6e110da3bca89cffbb96e5c65991eaf8c2927e755941b2181. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEF059303251 — a six-check JSON result.
Gabriel Fauré, Johann Sebastian Bach, Joseph Gabriel Rheinberger, Léo Delibes & Wolfgang Amadeus Mozart: Festliches Konzert in Der Abteikirche Amorbach Für Orgel, Drei Trompeten Und Pauken
Ratswahlkantate in D-Dur, BWV 29: Sinfonia, Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d294815cc5b542dad0dfc81a56b408c4758c4b72ddc54d7426f709a7549f00. 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/DEE219142601 — a six-check JSON result.
Orgelsonate Nr. 11 in D Moll, Op. 148: Cantilene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9a292070c21e5b63cee40d2436cad9ab836b964e05823ac5a1360f06c06f57. 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/DEE219142611 — a six-check JSON result.
Chamber Symphony, Op. 110a - orch. Barshai: 1. Largo (attacca:)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6065033f15bed9053be89cb8b254a8c32f22cb10b9f9fc9e20fdd700fdc0af7a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEF058902511 — a six-check JSON result.
Symphony For Strings And Woodwinds Op. 73A (Orch. Barshai): 1. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6528b3e6607632fad3c4bc416a003c598b81126eb97d992c0e1657a3a08bf260. 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/DEF058904781 — a six-check JSON result.
Chamber Symphony, Op. 110a - orch. Barshai: 2. Allegro molto (attacca:)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24e561521218dbce5861e79b6be455cc277e8565e47da4072e36bbd2992acd0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEF058902512 — a six-check JSON result.
Chamber Symphony, Op. 110a - orch. Barshai: 3. Allegretto (attacca:)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db87b8cb8f433435fd48021469799fcfdfae5907e5e60a17976191e2d89f9bb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058902513 — a six-check JSON result.
Chamber Symphony, Op. 110a - orch. Barshai: 4. Largo (attacca:)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9337eea69d503f3041ed61ed2b0d75b80d868e372c8c9987de3e7eff4c897080. 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/DEF058902514 — a six-check JSON result.
Chamber Symphony, Op. 110a - orch. Barshai: 5. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dd93c3f1eded1fbca583f40af725ca5e480e3d1f6c334321eac34cc9e6a40a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEF058902515 — a six-check JSON result.
Symphony for Strings Op. 118A (orch. Barshai): 1. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb402fe1b582d1da7ff45f78c4904c2d0a316cf5ed9c2de35fd4f8debeb0273f. 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/DEF058902521 — a six-check JSON result.
Symphony for Strings Op. 118A (orch. Barshai): 2. Allegretto furioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e968530c15d9b61de8945338e1aaa26e63e1b9c278011bd358fd4e2fd98c66. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058902522 — a six-check JSON result.
Symphony for Strings Op. 118A (orch. Barshai): 3. Adagio (attacca:)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa37221fb0adb02ad428fcf17608ed076c5a26079cab3acfad075a0f4bf04f48. 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/DEF058902523 — a six-check JSON result.
Symphony for Strings Op. 118A (orch. Barshai): 4. Allegretto - Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a66028c0e97747e7c78bb3fec91524838ab3637e2e3eeb90733f192d93eb145. 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/DEF058902524 — a six-check JSON result.
Chamber Symphony Op. 83A (Orch. Barshai): 1. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a12a0051798088e4495c7804a2383fce94c4b8071710513d29bc2dbc2846a23. 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/DEF059102551 — a six-check JSON result.
Chamber Symphony Op. 83A (Orch. Barshai): 2. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e092d8b2388646a6e9c5ece38b54e21bf5d5ddc920c5c8b68ea7e58ffc8e4b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEF059102552 — a six-check JSON result.
Chamber Symphony Op. 83A (Orch. Barshai): 3. Allegretto - attacca:
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35393801cff9f083a2d9a8e502c8460bfced41d0a7007aff3ae82a8de405aeaf. 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/DEF059102553 — a six-check JSON result.
Schnittke: Praeludium In Memoriam Dmitri Shostakovich / Shostakovich: Symphony No. 15
Violin Sonata No. 6 in G Major, BWV 1019: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dedd6e52862ebd26cca73616c575f3aeddb6b223eaecded6c630090ccd939ab. 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/DEF058300532 — a six-check JSON result.
Sonata in A Major for Violin and Continuo, Op. 2/2 , RV 31: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba439894afaf544887baf2be21a0933becba3e9e54a07db9f9d21ff518222750. 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/DEF057005112 — a six-check JSON result.
Oboe Sonata in f major, HWV 363a - Transcribed by Reginald Kell: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e45c82428f1f40c666a428b75b02be280417e756aa931584e506ca512691624. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEF055709263 — a six-check JSON result.
Sonata for Piano and Violin in F Major, K.13: 3. Menuetto primo - Menuetto secondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bae066ec9966e2336bd13a36091c79a448bf51c0ff23922732ffa4041db10ee. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056905923 — a six-check JSON result.
24 Preludes, Op. 28: No. 6 in B Minor, Lento assai (Arr. for Cello and Piano by A. Franchomme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789d1f7d3e9fcedb3a6c9b7a413f18f7fb4fa323a1cdf7846da5b1cac1f20b2f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM72300835 — a six-check JSON result.
Cello Sonata No. 3 in A Major, Op. 69: III. Adagio cantabile –
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f9f225b3f1c44edbe1455cfa238e40dc5543d40031cd2bb01a19deeee4270d. 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/DEB330182004 — a six-check JSON result.
Nutcracker Suite, Op. 71a, TH 35: Danse Chinoise, Allegro moderato (Arr. Economou for 2 Pianos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5d8ba3c0b67094c66e9ff492f31413f922b6cbc32449b2e3ea9f2a034569ad. 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/DEAQ72221415 — a six-check JSON result.
Petite pièce, CD 127 (Version for Oboe d'amore & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54a8a198a1b60a2f040394b3c8d83856b8f60174f3410b1dd074756f4743f9a. 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/DEB332169413 — a six-check JSON result.
16 Waltzes, Op. 39 - For Piano Duet: 4. in E minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0529671895bebbac93c47ae35455408e6eb0f468be0358f8b0bb817a816df561. 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/DEC989800322 — a six-check JSON result.
Trois morceaux en forme de poire: No.1 - Lentement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d1b9ec76c2518579db0f786fae6f0469d5c9d8caee7d031338f71cd521e34f. 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/ITP900900015 — a six-check JSON result.
Valse sentimentale, Op. 51, No. 6: Valse sentimentale, Op. 51, No. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddf95f9d5e2284110bb5d69d45b8ac22462ba976c5ed848c61a8d3375b18af4. 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/DEF056905330 — a six-check JSON result.
Sonata for Cello and Piano No. 3 in A Major, Op. 69: III. Adagio cantabile - Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d446d513fd6e77f2cb91121bb807b5f0f494f62e9cdd1a2937d505ff24a8e9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055901004 — a six-check JSON result.
Rapsodie espagnole, M.54: 2. Malagueña: Assez vif
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Violin Sonata No. 10 in G Major, Op. 96: III. Scherzo (Allegro)
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44 Duos for 2 Violins, Sz. 98: No. 43, Pizzicato. Allegretto
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Cello Sonata No. 1 in F Major, Op. 5 No. 1: Ic. Adagio – Presto
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The Constant Music Master - Instalment 2 / 11. Duetto à Violino ò Flauto e Viola pomposa In G Maj.: 2. Scherzando
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Peer Gynt Suite No. 1, Op. 46 - Arr. The Cambridge Buskers: 4. In the Hall of the Mountain King
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5 Easy Pieces for Piano Duet: 1. Andante
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16 Waltzes, Op. 39 - For Piano Duet: 15. in A
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44 Duos for 2 Violins, Sz. 98: No. 5, Slovakian Song 1. Molto moderato
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12 Movements from Romeo and Juliet, Op. 64: X. Dance Of Five Couples (Transcription For 2 Pianos By Sergei Babayan)
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12 Movements from Romeo and Juliet, Op. 64: VI. Juliet As A Young Girl - The Nurse Delivers Juliet's Letter To Romeo (Transcription For 2 Pianos By Sergei Babayan)
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Twenty-Four Preludes, Op. 34: No. 21 in F flat major - Allegretto poco moderato
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The Constant Music Master - Instalment 2 / 11. Duetto à Violino ò Flauto e Viola pomposa In G Maj.: 1. Dolce
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5 Easy Pieces for Piano Duet: 4. Napolitana
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Duo for Violin and Cello in E-Flat Major, Unv 8 (Fragment)
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12 Movements from Romeo and Juliet, Op. 64: IV. Quarrel (Transcription For 2 Pianos By Sergei Babayan)
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Trois morceaux en forme de poire: Prolongation du même. Au pas
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Lieder ohne Worte VII, Op. 85: II. Allegro agitato (Arr. Ottensamer for Clarinet & Piano)
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36 Originaltänze (German Dances) for Piano, Op. 9: German Dance No. 14 (D 365, No. 9)
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Twenty-Four Preludes, Op. 34: No. 10 In C Sharp Minor
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Partita "Polonaise" in A major for two guitars: Le Pris
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Partita "Polonaise" in A major for two guitars: Combattans
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Partita "Polonaise" in A major for two guitars: Rigidon
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Le tombeau de Couperin, M. 68: I. Prélude
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Le tombeau de Couperin, M. 68: II. Fugue
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Miroirs, M. 43: No. 3, Une barque sur l'océan
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La valse, M. 72 (Version for Piano Duet)
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Martha Argerich - Solo Works & Works for Piano Duo