thumb| Roland Pöntinen Roland Peter Pöntinen (born 1963 in Stockholm, Sweden) is a Swedish pianist and composer. Pöntinen was born to an Ingrian Finnish father and Swedish mother. He studied at the
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 0x0e61cccd8a3b9d9a6cb62f90dff6921bfbebf51765890a97b7d2b8ff8d08abd1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a49547b0-fa3b-492a-b7bb-fe87fb33c7bf.json and https://artists.proofprofile.net/proofs/artist/a49547b0-fa3b-492a-b7bb-fe87fb33c7bf.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
The Verbier Festival Celebrates Rodion Shchedrin At Ninety (Live)
Double Concerto for Piano, Cello, and Orchestra "Romantic Offering": I. Moderato quasi andantino - Live
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 0xb258c11613fd9f0a3745ac10a6a78c57bf3ea7ad511c51fb8131ef53f1403b13. 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/DEN962202661 — a six-check JSON result.
Double Concerto for Piano, Cello, and Orchestra "Romantic Offering": II. Allegro - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065e7e8a96ff50eef86a4a78f66d89758d0d79f80087d3e88a87a5843033a6ee. 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/DEN962202662 — a six-check JSON result.
Double Concerto for Piano, Cello, and Orchestra "Romantic Offering": III. Sostenuto assai - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9a170a90ab4f61a65f03a4b556dcee0f5dbc277d5f9832a2bb241c034eb260. 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/DEN962202663 — a six-check JSON result.
Ancient Traditional Russian Melody: I. Lento in poco rubato - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb584e3d3e641603abe33afdc9c6d9f5a5789ab96c793967fb02b720ab614e0d3. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEN962202671 — a six-check JSON result.
Ancient Traditional Russian Melody: II. Allegro, ma non troppo - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575058795361360d7bba32985bae3e36f2a621148dbd3a38ce5cbc80ad3de63a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEN962202672 — a six-check JSON result.
Concerto for Orchestra No. 1 "Naughty Limericks" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b7e3cf08d4cce99210a1df53ba1b95a306f76a6d54fbed3070ba8dcc99f256. 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/DEN962202690 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759ba372da7c8187a82e7cb3d1fb5296a471d5a7dc8637c9bc9f4016de614ca0. 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/SE5XG2051328 — a six-check JSON result.
Violin Sonata in E Minor, Op. 82: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c9b210fa4c7e59ce26e18b94488de85dece88fea66fe2c0de7cde61f8edb0b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SEAEC2459010 — a six-check JSON result.
Chanson de nuit et Chanson de matin, Op. 15: No. 1 Chanson de nuit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2301b954de7a5d1044095be39fa3149fc52372ec4a49ca7d5934793437e234b3. 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/SEAEC2459040 — a six-check JSON result.
Chanson de nuit et Chanson de matin, Op. 15: No. 2 Chanson de matin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c1b26fd7d396485397a43151e96c5fee7d24b246d3046b0025b44c69f0f268. 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/SEAEC2459050 — a six-check JSON result.
Romance in E Minor, Op. 1: Romance in E Minor, Op. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9a695a2de6d3b47806bca447e611a0a9780ccd89cc29e05b92480adc525ecf. 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/SEAEC2459080 — a six-check JSON result.
Salut d'amour, Op. 12: Salut d'amour, Op. 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1527c0bc0ea53834a944c8dfa0b47be4029229b40053f5511892de71b1cf4afd. 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/SEAEC2459090 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fcd4b0cd8b3da7c8aeea9c497c54f53c87d6d75c6434fccb20c0f5c1db1ce2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2459100 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564482beb9e7f31857f3fbcf4407842b28ba24cf259ab0fcef613633007ba1a1. 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/SEAEC2459120 — a six-check JSON result.
Tchaikovsky: Suite from Pique Dame (Live)
Roland Pöntinen Plays Romantic Piano Music
Chopin: Mazurka No. 13 in A Minor Op. 17 No. 4: III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c388f9222a558308652a851f757e255a9143f27d704e9473b7a5ae09d14f61. 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/SE5XG2402114 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39401f74a391a7098984dfc9e4a6461a77be798e04f09d914f6f73f1c9f02e22. 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/SE5XG2402116 — a six-check JSON result.
Chopin: Nocturne in E-Flat Major Op. 9 No. 2 I
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Chopin: Polonaise in A-Flat Major, Op. 53 II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbac9ab892948c4e92fb41b4174630d737c50e7b561d71c8c257b951fd2cabe0. 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/SE5XG2387007 — a six-check JSON result.
Liszt: Piano Concerto No.1 in E Flat Major
Mythes, Op.30: 1. La Fontaine d'Arethuse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88103cd270afcb43374c5fde32e684a7baeb05582f0bc69257671db4900b88b4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2252010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40157b9b153ff785c26be75c899f3655b4e8d2d67760e936f816684d39ce1e99. 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/SEAEC2252020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94e8ea92f8cb0ec081a51447250fb4f716c350f100ddab7b99e272897f2b379. 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/SEAEC2252030 — a six-check JSON result.
Notturno and Tarantella, Op.28: 1. Notturno
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Prokofiev, Shostakovich & Kissin: Works for Cello & Piano
Schubert: Four Songs for Trombone and Piano
Tchaikovsky: Six Romances Op. 6 (Arr. for Trombone and Piano)
Mozart: Piano Sonata No. 11 in A Major, K. 331
Piano Sonata No. 11 in A Major, K. 331: 1. Tema (Andante grazioso) con variazioni I
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde34287df054bc14f131b012976722ab672a1718ab97189306acec655b4c7498. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5XG2045402 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb2d1796d877b69825c842970d47dfd8740f7128728fda94ee5dd77ba42eb55. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5XG2045404 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20796982824b43b1f0344f711941275a74ea20509faef336823aba424d3c048. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5XG2051305 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16c05d05e2742bf038dc9606a1e7a7c7623a0917f943bda85755f1b5b38c254. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5XG2114411 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ad6254cec134ad66d0b85a93fc60c5742f7795c48203f7449cb7e364beaf29. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5XG2174202 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca99b7164eeb7c4dc3b2551f4adbdb29cc57dad3e08eb3e76f0fc5241be9aa3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5XG2174210 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ce0d53a1c7ab7373762b501bcc5a9bb43cd41fb2424836bc427cb3e4f9787. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5XG2178605 — a six-check JSON result.
The Nutcracker Suite, Op. 71a, TH 35: 1. Miniature Overture. Allegro giusto I
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The Nutcracker Suite, Op. 71a, TH 35: 1. Miniature Overture. Allegro giusto II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd080bfe0180cd4ecf474906d00d6f5466d4973f2699739a539b96f25d569ed91. 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/SE5XG2179502 — a six-check JSON result.
The Nutcracker Suite, Op. 71a, TH 35: 1. Miniature Overture. Allegro giusto IV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe992096ad3c4a74ca4f4796f881abfff3d0d03825cf0ed81b17c8f0c4351a2d2. 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/SE5XG2179504 — a six-check JSON result.
The Nutcracker Suite, Op. 71a, TH 35: 2a. March. Tempo di marcia I
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The Nutcracker Suite, Op. 71a, TH 35: 2a. March. Tempo di marcia II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6e560c68cd6797412143a3c8da2c1a7bd3b683bd4a8f6addcbf9046b78fc81. 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/SE5XG2179506 — a six-check JSON result.
Three Gymnopédies (1888): Gymnopédie No. 1
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d9c20a1457d1d5eb852b765fdc8ca2e3024b46dd94f89955cc264c7127267d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAED8617010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfe1856bd5f105b5623e78c30521618d694961a0d3270563a284943982dad5f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEI9777020 — a six-check JSON result.
Three Gymnopédies (1888): Gymnopédie No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46aa16cc8779dfd98eb1a3848c1f1cc016dec16402667cac6fbe126104ad8c8. 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/SEAEI9777240 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921d7209df489d0baddab4ca4cdc090174c541dc0cdd0405a8d22f5384c69716. 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/SEAED8617170 — a six-check JSON result.
Trio in A Minor for Clarinet, Cello and Piano, Op. 114: II. Adagio
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Piano Sonata No. 12 in A-Flat Major, Op. 26 "Funeral March": I. Andante con variazione
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The 35 Most Evil Pieces of Classical Music
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