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 0x2dedaff5de74ac6b15992b2440ead3ac2678f8cfd984e2bd9c56192ecafd5aa6. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e9f8a35-f8be-4563-aa99-8f5c16b5c27f.json and https://artists.proofprofile.net/proofs/artist/9e9f8a35-f8be-4563-aa99-8f5c16b5c27f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Krzysztof Meyer - 20th Century Chamber Music
Mozart: Complete Edition Vol.12: Arias, Lieder etc
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 0xf7db8ee29cf0d251813f630c87d37d0f59b6291207f58d0273de0a68a2b5ac16. 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/DEF057902060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb45f68a97324492671bb943c2e8f2dd9aa5d8b4d06c1c356b2375ae9fcdc37d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEF058104250 — a six-check JSON result.
Or che il dover... Tali e cotanti sono, K.36
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123d805dc9bf7a524dc19654685b90407f71da1ce3c1c2381efef0aecd99b366. 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/DEF057902070 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0c8f5474f9a4781a5dbee500f8c0c3224bd3b5d9a34c871f6223df7d330a40. 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/DEF058002580 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd18412d71bb0000295aa85181e7294dd50a2c91bfbd1885109cbd9a89a59c8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058104390 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11c00d0034d55ba290ec691484d47bf4d77074e55fa5a04cd94474f692dd3d3. 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/NLA508603833 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c64863f368ebff4fd0e67cb3fd221172056e89b76c3e5c0f4a143a73aed8ee. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLA508900310 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4c2b532ae473ceb68f94a451ba690bb3685a3b31b8798155cd10ee6fc255d9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLA508603817 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7858bbbe010505b203742f77051f89658b0ce63e388ea1320404dd6afb82a1. 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/NLA507400501 — a six-check JSON result.
Mozart: Arias, Vocal Ensembles & Canons - Vol.3 (Complete Mozart Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4c2b532ae473ceb68f94a451ba690bb3685a3b31b8798155cd10ee6fc255d9. 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/NLA508603817 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4593cbf98de5995fb022350afaeaed90414e825a88e95b809056fab8378d1ca3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508603820 — a six-check JSON result.
Mozart, W.A.: Clarinet Quintet, K. 581 / Excerpts From The Magic Flute and The Marriage of Figaro (Arr. for 2 Clarinets)
6 Minuets K. 105 (attribution doubtful): No. 6 in G Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0d086e4dde60581a2593f42ad59b3422cfb323cc9c2d0aea05a3a1be4b2001. 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/GBBBA6550626 — a six-check JSON result.
Divertimento in B flat, K.186: 2. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac6531e88d2a260b0974c98597966febeee3ce7f54675e00cf28c080a99bbad. 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/NLA508807002 — a six-check JSON result.
Les petits riens, K.app.10 (ballet): Gavotte joyeuse (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48f52a307ba8e8d30cec3aaec6aab37bc18f13edae3c1aedb82f47e5159f8b4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBF075641206 — a six-check JSON result.
Serenade in B-Flat Major, K. 361 "Gran partita": VI. Tema con variazioni. e. Var. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83082a642d14dbd63b7784f91de96470c9a1a6fc30db77c44050f5bf5d2dc94d. 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/DEF058603871 — a six-check JSON result.
Sonata in F Major, K. 547a: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882026893e3946316aab83d6eb5a11c54ee761004979af872dd9104282f273d6. 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/DEF055502442 — a six-check JSON result.
Piano Sonata No. 11 in A Major, K. 331: 3. Alla Turca (Allegretto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e1e91a4a3985d99335b566904c6624dacb9aebaf993d37d712f01170768565. 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/DEN961601251 — a six-check JSON result.
Andante And Five Variations For Piano Duet In G, K.501: Variation 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae77cb44771a6b464c3f971f53406c24d3e9fad930682ef5a211361249c3cba2. 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/NLA507706210 — a six-check JSON result.
The London Sketchbook, K. 15a-ss (Orch. Smith): Presto in B-Flat Major, K. 15ll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59159131746635181c1b98ddefdaf3c25180d6ea63cd3611944d2ea33369ecd8. 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/NLA507101048 — a six-check JSON result.
Ballet Intermezzo, K. 299c (Compl. & Orch. Smith): I. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b504adeb713e6d79e90c18af57bf019c0bb91a74d42d15ec06b2bb510c2b92. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/NLA508840913 — a six-check JSON result.
Piano Sonata No. 11 in A Major, K. 331: 1c. Variation 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f3cf2e953629edef4120b6d8eb30ec5bc73cd7a9a227e0521958bc2a0830ce. 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/GBF077311904 — a six-check JSON result.
The London Sketchbook, K. 15a-ss (Orch. Smith): [Contredanse] in F Major, K. 15x
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c6577ddad6739e34a778ba2c61f45776da9b7e0d6438dc6708127fb33aa8cc. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507101030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500cb54604c8436408918c8d5d9db81734064a5686fcb842ea6794449360b369. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBF071601190 — a six-check JSON result.
Six German Dances, K.571: No. 5 in B flat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec49db33c46f1e723d9b0bfd51548950f255f7962898ef06016056d14e583cd1. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEN960432010 — a six-check JSON result.
Les petits riens, Ballet, K. 299b: No. 7, Passepied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01bbcc20b6fbf99f357a0b8b57b0ea9e87f059da160a11ba8937bf1e3bbc4d9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLA508840908 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03207f25474f5cc07dff20d748cdd2252e727d5ea61291a95b2abbd4ea6ab2bc. 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/GBF078010092 — a six-check JSON result.
The London Sketchbook, K. 15a-ss (Orch. Smith): [Contredanse] in G Major, K. 15e
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55ead2a0390d8893a3d490bb2838940cf10ae259627a57214856e8dbf1b8f94. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLA507101042 — a six-check JSON result.
Piano Version of Ballet Music from Ascanio in Alba, K.Anh207: No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6138a4751a3cb5d6b3d219d2c600ded549d18cab02ea5a6284e3dc480e5ffbf0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBF071600142 — a six-check JSON result.
Piano Version of Ballet Music from Ascanio in Alba, K.Anh207: No. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3afce00616624f554d2c26291d93f3fcb00586eb68262cd6bb41783b68848b7. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBF071600146 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3585228bc61cf1b7bfd5e941048089d46d8bf80fa253de401eded019d84f111. 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/GBF077613640 — a six-check JSON result.
Piano Trio K.495a, Start of First Movement in G (Fragment)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cac2209acaf28d3d2b1234719a6c0484f344d906ad415addb870f0ce3151ba9. 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/GBF071600340 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc37b4c508974ada8fcb1ddf298f76c44ffa9455bb8434a09b2726a8386ea0d4. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508603832 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95cb78905a77504f97623150b91d739c76a861cba25966ab9188d13dcf460c9. 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/NLA507613701 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95d3945cc1e05dddfa717337eef6bff422ebf24abd1885ec0ecbabefd459eba. 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/GBF071601450 — a six-check JSON result.
Les petits riens, Ballet, K. 299b: No. 4, (Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0771328515e3b1e95e87c64eaa700c4d9fdb6ecba905b55a8e6a36998445286a. 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/NLA508840905 — a six-check JSON result.
'12 German Dances' and other works - Mozart
Divertimento in D Major, K. 136: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe3daecd896d732ef0d40234976bd18c51822742ba4271ad7664764981a1c59. 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/DEF056100654 — a six-check JSON result.
Nine Variations in D, K.573 on a minuet by J.P. Duport: 7b. Variation VI - Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15c933e6371f11508fad7cd7fa1471053017120272e4b5ad546b3ff1b50057d. 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/FRUM72200546 — a six-check JSON result.
Piano Sonata No. 17 in B Flat Major, K.570: 2e. Adagio - Pt. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd174aa8401c8281759a21cda5362b89f302efe1b1cccf05a159ae377129e83f. 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/FRUM72200635 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68eb3fb48baf1ebac990f7eef29aea0a4fe8a5697a4940e649a6f57596523a99. 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/GBBBA0200340 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a20218460d36becb29019331bb3148b1199c29ae665a093e49c1970faf94070. 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/GBBBA6450205 — a six-check JSON result.
Six Contredanses K. 462: No. 4 in D Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1ffc2fde81f95c43a4fa04ac2f2cd2a78e9937f0e371b7e18d86a66fc79648. 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/GBBBA6450224 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe16061e224b8f282b325bcf5d7afee5657248a89fc8131c4edb331711706de. 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/GBBBA6450243 — a six-check JSON result.
12 German Dances, K. 586: No. 6 in D Major
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Divertimento No. 11 in D, K.251 "Nannerl-Septett": 4a. Menuetto (Tema con variazioni): Tema
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8 Variations on ‘Dieu d'amour’ from ‘Les mariages samnites’ by Grétry in F, K.352: 6b. Variation V - Pt. 2
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"An Evening of Classical" - Chopin & More
Waltz No. 6 in D flat, Op. 64 No. 1 -"Minute"
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Prelude in A-Flat Major, KK IVb/7. Presto con leggierezza
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Mazurka No. 4 in E-Flat Minor, Op. 6 No. 4. Presto ma non troppo
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24 Préludes, Op. 28, C. 166-189: No. 3 Vivace in G Major, C. 168 - Live
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24 Préludes, Op. 28, C. 166-189: No. 5 Molto allegro in D Major, C. 170 - Live
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Waltz No. 16 in A Flat Major, Op. Posth. B.21 - Edit
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24 Préludes, Op. 28, C. 166-189: No. 14 Allegro in E-Flat Minor, C. 179 - Live
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24 Préludes, Op. 28: No. 7 in A Major. Andantino - 2011 Recording
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Mazurka No. 40 In F Minor Opus 63 No. 2 - Edit
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24 Préludes, Op. 28 - Arr. Hirschfelder: Prélude No. 15 in D flat, Op. 28, No. 15 - "Raindrop"
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Impromptu No. 1 in A-Flat Major, Op. 29 - Edit
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Nocturne No. 16 in E-Flat Major, Op. 55 No. 2 - Edit
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Three Ecossaises Op. Post 72, No. 3 - 1, 2 + 3: No. 3 In D Flat Major
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12 Etudes, Op. 25: No. 9 in G-Flat Major "Butterfly Wings"
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Nocturne No. 18 in E Major, Op. 62 No. 2 - Edit
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Mazurka No. 5 in B-Flat Major, Op. 7 No. 1 - Edit
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Waltz No. 19 In A Minor, Op. Posth. B. 150 - Edit
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Musik zu einem Ritterballet, WoO 1: No. 7, Deutscher Tanz. Walzer
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Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": I. Allegro con brio
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12 Contredanses, WoO 14: No. 2 in A Major
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24 Variations on "Venni Amore" in D Major, WoO 65: Variation XVI
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12 Contredanses, WoO 14: No. 1 in C Major
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The Creatures of Prometheus, Op. 43: No. 11 Coro di Gioja. Andante
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12 Variations On "Ein Mädchen oder Weibchen" For Cello And Piano, Op. 66: Variation VI
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12 Variations On "Ein Mädchen oder Weibchen" For Cello And Piano, Op. 66: Variation V
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12 Contredanses, WoO 14: No. 4 in B-Flat Major
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Piano Piece in C Major, Kafka f. 47v (Staves 5-8)
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12 Variations On "See the conquering hero comes" For Cello And Piano, WoO 45: Variation VII
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The Creatures of Prometheus, Op. 43: No. 11 Coro di Gioja. Andante - Live In Utrecht / 1995
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12 Variations On "Ein Mädchen oder Weibchen" For Cello And Piano, Op. 66: Thema. Allegretto
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6 Ländler for 2 Violins and Bass, WoO 15: No. 1 in D Major
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6 Ländler for 2 Violins and Bass, WoO 15: No. 3 in D Major
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24 Variations on "Venni Amore" in D Major, WoO 65: Variation XIX
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'A Very Little Night Music' and other works - Mozart
Serenade in C Major, K. 648 "A Very Little Night Music" (Version for 2 Violins, Cello & Harpsichord): I. Marche - World Premiere Recording
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Serenade in C Major, K. 648 "A Very Little Night Music" (Version for 2 Violins, Cello & Harpsichord): II. Allegro - World Premiere Recording
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Serenade in C Major, K. 648 "A Very Little Night Music" (Version for 2 Violins, Cello & Harpsichord): V. Adagio - World Premiere Recording
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Serenade in C Major, K. 648 "A Very Little Night Music" (Original Version for 2 Violins & Bass): II. Allegro - World Premiere Recording
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Serenade in C Major, K. 648 "A Very Little Night Music" (Original Version for 2 Violins & Bass): III. Menuet [I] – Trio - World Premiere Recording
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Serenade in C Major, K. 648 "A Very Little Night Music" (Original Version for 2 Violins & Bass): V. Adagio - World Premiere Recording
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Serenade in C Major, K. 648 "A Very Little Night Music" (Original Version for 2 Violins & Bass): VI. Menuet [II] – Trio - World Premiere Recording
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14 “Interval” Canons K. 508a/3-8 & K. Deest: Canons Nos. 1-5, K.508a/3 & K. Deest
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