Ruth Slenczynska (born January 15, 1925) is an American classical pianist and the last living piano student of Sergei Rachmaninoff. Early life Slenczynska was born in Sacramento, California. Her Poli
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 0xbff54ca1ed6c68c0d68922a82bc28800c3a07976b791aebfd84e6100c27ae4c4. 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/ae23da44-e58f-4f16-8e35-f243f9f3831d.json and https://artists.proofprofile.net/proofs/artist/ae23da44-e58f-4f16-8e35-f243f9f3831d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xc6f983501e69d4bd45d0a7716f5785dc42e4f33e60dd7a19baa52ee56d29acc5. 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/GBUM71406939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203b72781e9890cfb5456180de8971bfa8858e99fed143915bae51dcf075b681. 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/GBF078341401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa19e91e5fefe2e15916b279b838dd129313d475b41ea37e86b3bdb092632fc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBUM71406942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fca4224f587e450442d731bf05121f4f2ab17a8f607a75e826d7fae751b84a. 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/GBUM72001259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eae1c2b0a2886fcb433bb66e6ad75837a86fcf0aa138559b5b0eb3bc087e25. 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/GBBBA1800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b57c12e920d0326001efdc1f73585f1e626ed8f0bfef31557a4ef12afab00a. 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/GBBBA0500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b7ba7248ef52719ece9886637dba426d51166d4b548930b270449df9144a07. 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/GBAAA8600074.
WOMEN AT THE PIANO - AN ANTHOLOGY OF HISTORIC PERFORMANCES, Vol. 1 (1926-1952)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70d88adfb9a4cd1c23080cac89c38bf535a658f585487d7c088e2a9b9b1958b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079540817.
Waltz No. 6 in D-Flat Major, Op. 64 No. 1 "Minute Waltz"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6d83d62319bf4150e2ccd51fde237d2e8b7af6bdaa39a659283cbdbae61eb4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF079910430.
12 Etudes, Op. 25: No. 6 In G Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6c5a1c63a2d5a72090da931601c47ec4326e6594194210839f6f0e8b14f803. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF071440306.
Nocturne No. 19 in E Minor, Op. 72, No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff32a53828675f3446f843359bf842d58baf5ca01fdba1bb78a3f0ba72ddbd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA1100450.
12 Études, Op. 10: No. 12 in C Minor "Revolutionary"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcf9de3202b40bd735b7483236d7758d5a4c6578d24b7bca314f0394570cf14. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057230011.
24 Preludes, Op. 28: No. 11 in B Major. Vivace - Recorded 1974
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f2830da63f438ed53ce2d2b79b8eae82eac9f21c32ef489406e6bdda90191e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057430611.
Fantaisie-Impromptu in C-Sharp Minor, Op. 66
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728c2fed92facb7b5bed5d139b7486d4ed14f3f268b141af4b84d5dcd16c548e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961700570.
12 Etudes, Op. 25: No. 1 In A Flat Major - "Harp Study"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823af7e8885eb2774fb2f27b541c71a52496d635e607cebff92f70ec6daba077. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071440301.
Mazurka No. 5 in B-Flat Major, Op. 7 No. 1. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123fcaf4c45baf59ccab75af39c8bacf610e45ef09ff3bf5200e79a7bcbc6e78. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078340605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1660aa54a3eeb98d752c81ebb5e0237b5c1c89fa1a869226e231ff8a1a3b383. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057530507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c7cbb86384748f6bef5d19273786beb0abf236f2d25629a979e32732ebe683. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078040207.
24 Préludes, Op. 28: No. 7 in A Major: Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517b03c6d6f7f6515890289130d8ee2c67e7d75708df25cae449c86b11da686a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057131107.
Waltz No. 8 in A-Flat Major, Op. 64 No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ee14fed490ff2bb06e6d4ed8219998eefd05a4661ba92b6c19fe2cadeb816c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077611553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2edb8e284af9213cdab48ed7b6146a6b9c927680112a9364f5974e2135bca6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507812603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07ec2faf2d4780ff05996a3770a5751b59e355d0e0d66160b6bf3c4d560b846. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078140412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4162046f34c75f20a3ea1af0fa773640c4a4be49c84d78e0422011f509346f09. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059902580.
24 Préludes, Op. 28: No. 21 in B-Flat Major: Cantabile - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa053a802063102732f418d9bfb99ae1f177111cf3fbe515fbad1ca77d16db23a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLC701552421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3f4779b9cb742d45354e7fbfb77d8c2e8858d4babfb03feaaae32287257983. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059902590.
Mazurka No. 34 in C Major, Op. 56 No. 2. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f88fab95f08d772ce678ec044848f1c7800fd7c0258f0af42ade5b8f1707fe8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961801612.
Waltz No. 6 in D Flat, Op. 64 No. 1 -"Minute"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1aa5feed445ae9010ab7e6927a7c680a5ffe978d99d3c052d140b4bcf63dc3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508101906.
Waltz No. 7 in C-Sharp Minor, Op. 64 No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ba9f534b35b7daa6b630f2d1f6ad0e7eaf84f0ac3816162739ae89df10982f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960801600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae47c1b0f0061cdba7a3d39b8a59f7f5053507f90596a2d538920b087e60193c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059603310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04159755872dc45be781d1fb37018743752b7c4547918e26267b78755d417c42. 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/DEF056730720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbda303768f85acf70f7d2a9788ea238fb045a14c4c705414aa11256319c3e9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBB0102006.
Waltz No. 8 in A-Flat Major, Op. 64, No. 3 (Arr. Godowsky)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daaf09f5550eac7616c7a4822baa9b2c747b69ccd4a79f59285452713150db7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077742910.
Variation sur la marche des Puritains de Bellini, KK Anh. Ia/5 (Var. 6 of Hexaméron by Liszt, S. 392)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119e04d990c36f93b9fd52d20739541598ef5624756c60a40734a69c9dd05989. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078240314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15689e3912d79986047dcb606e2cb23ed471d3b89d94f4eac894abe446922163. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059902550.
Piano Sonata No. 2 in B-Flat Minor, Op. 35: IV. Finale (Presto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf513e71598667d08493510cec37a0136f6e23e10cd0f647d1908ab01f2c4dce. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059103044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57bc4748f6826fd3bbbbfb3f9d59bf54db854733696ced611af445cfbe0e2fe. 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/DEF056730730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc229bc53fbaba9d41126fe68c51d1b42840cee4a675a8e46b4699ba33872a3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077940409.
3 Mazurkas, Op. 63: No. 2 In F Minor. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077bba7334321a57d73883efa60786827fc2362b0bb300a21ae5a54dade05071. 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/DEN961600382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6399348c72f2d98ee6ae32c4506e3e2de0a7742605391d19d23ac0927983b733. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078240204.
24 Préludes, Op. 28, C. 166-189: No. 9 Largo in E Major, C. 174 - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49cf72ab5dedd87f2a093c3f3c47b02811cac8de6c5b4412059938065e4fd8b. 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/DEN961330609.
3 Mazurkas, Op. 59: No. 1 in A Minor. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094a735192f28240f5917dc361c1ca5aaa6dffab75826bbae67721d616a06480. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961600351.
Mazurka No. 38 In F Sharp Minor Op. 59 No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29530e018991179bce3df6084812f247d29b4c19a6280706711f4486cd1bb7c7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEF056730740.
Waltz No. 5 in A flat, Op. 42 - "Grande valse"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eefd50bed2bfcc060da754d01ed5ed060a57375e63367e8078ac524205fdce. 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/GBF079540805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecaa09ca3c17f87e5a904664c0e1c23c7ddb489b1593b24d704dd02c8118aae. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071440304.
Waltz No. 13 in D-Flat Major, Op. 70 No. 3
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3 Mazurkas, Op. 59: No. 3 in F-Sharp Minor. Vivace
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Piano Sonata No. 3 in B Minor, Op. 58: II. Scherzo. Molto vivace - Live
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Introduction And Polonaise, Op. 3: Introduction - Lento - Excerpt / Live At Concert Hall, Kyoto / 2000
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Mazurka No. 22 in G sharp minor, Op. 33 No. 1
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24 Préludes, Op. 28, C. 166-189: No. 20. Largo in C Minor, C. 185 - Live
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12 Etudes, Op. 25: No. 6 in G-Sharp Minor "Thirds"
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12 Études, Op. 10: No. 11 in E-Flat Major
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2 Waltzes, Op. 69: No. 1. Waltz in A-Flat Major
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2 Waltzes, Op. 69: No. 2 Waltz in B Minor
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24 Preludes, Op. 28: No. 1 in C Major: Agitato
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24 Preludes, Op. 28: No. 15 in D-Flat Major: Sostenuto
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13 Preludes, Op. 32: No. 5 in G Major. Moderato
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Grand valse brillante in E-Flat Major, Op. 18 (Ed. Paderewski)
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Préludes / Book 1, L. 117: No. 8, The Girl with the Flaxen Hair
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12 Études, Op. 10: No. 3 in E Major (Ed. Paderewski)
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Prelude and Fugue in C-Sharp Minor, BWV 849
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Ruth Slenczynska - Complete American Decca Recordings
3 Waltzes, Op. 64: No. 2 in C-Sharp Minor
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Chopin: 12 Etudes op. 25 / Impromptus op. 51 & 66
Chopin: 12 Etudes op. 10 / 2 Impromptus op. 29 & 36
Schumann: Carnaval / Kinderszenen / Sonata No. 2
Ruth Slenczynska Plays Chopin And Liszt Live!
Chopin: 12 Études, Op. 25; Barcarolle, Op. 60; Tarantella, Op. 43
Chopin: 12 Etudes, Op. 10, Trois Nouvelles Etudes, Berceuse, Op. 57, Three Ecossaises, Op. 72
Chopin: 12 Études, Op. 10: No. 3 in E Major (Ed. Paderewski)
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Barber: Fresh from West Chester: II. Let's Sit It Out, I'd Rather Watch
Debussy: Préludes / Book 1, L. 117: No. 8, The Girl with the Flaxen Hair
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Chopin: Berceuse in D-Flat Major, Op. 57
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Rachmaninoff: 13 Preludes, Op. 32: No. 5 in G Major. Moderato
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Chopin: Waltz No. 7 in C-Sharp Minor, Op. 64 No. 2 (Live)
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12 Études, Op. 10: No. 2 in A Minor "Chromatique"
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Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 1
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Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 2
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Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 3
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Introduction and Variations on a German National Air Op. posth. (KK 925-927) - Pt. 4
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Ballade No. 1 in G Minor, Op. 23 - Pt. 1
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Ballade No. 1 in G Minor, Op. 23 - Pt. 3
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Ballade No. 1 in G Minor, Op. 23 - Pt. 6
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Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 1
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Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 8
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Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 9
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Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 11
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Scherzo No. 2 in B-Flat Minor, Op. 31: Presto - Sostenuto - Pt. 13
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3 Waltzes, Op. 64: Waltz No. 6 In D Flat, Op. 64 No. 1 "Minute" - 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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'Fantasie Impromptu' and other works by Chopin
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Mazurkas, Op. 68: 4. Andantino In F Minor
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12 Etudes, Op. 10: No. 4 In C Sharp Minor
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Mazurka No. 26 In C Sharp Minor Op. 41 No. 4
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12 Etudes, Op. 10: No. 6 In E Flat Minor
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12 Études, Op. 25: No. 5 in E Minor "Wrong Note"
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Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funèbre - Pt. 1
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24 Préludes, Op. 28: No. 15 in D-Flat Major : Sostenuto - Pt. 2
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12 Etudes, Op. 10: No. 10 in A-Flat Major
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Nocturne No. 2 in E-Flat Major, Op. 9 No. 2
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'January': A Calendar of Classics: Chopin
12 Etudes, Op. 10: No. 2 In A Minor - "Chromatique"
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12 Etudes, Op. 10: No. 4 in C Sharp Minor
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Waltz No. 1 in E-Flat Major, Op. 18 "Grande valse brillante" - Pt. 2
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Waltz No. 1 in E-Flat Major, Op. 18 "Grande valse brillante" - Pt. 4
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Waltz No. 1 in E-Flat Major, Op. 18 "Grande valse brillante" - Pt. 5
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Waltz No. 9 in A-Flat Major, Op. 69 No. 1 "Farewell" - Pt. 3
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Waltz No. 15 in E Major, Op. posth.: Tempo di Valse
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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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3 Ecossaises, Op. 72 No. 3: No. 2 in G Major
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Les Sylphides (Orch. Douglas): III. Waltz No. 11 in G Major, Op. 70 No. 1
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3 Ecossaises, Op. 72 No. 3: No. 1 in D Major
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef10353e67605c6bbca43c73a9d9ef036fd8a9e2030ba6b3417f1046e49d6ca1. 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/DEF059902340.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3500b8ba51f28f770de0bb21c9ac75bd4706ea4d842ea2093ee6078077c4b2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEF055510270.
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Impromptu No. 4 in C-Sharp Minor, Op. 66 "Fantaisie-Impromptu"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbbd35534c4dca818f9b8953f1d4fd2b0fa25e9751e9209acf9e3ed2e97d559. 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/ITUM71800095.
Visions Fugitives, Op. 22: 7. Pittoresco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a021bba1c18738f2c8b535900895e40a84d89df9a3657bec4744dd82146e6a0. 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/GBF079442807.
Swan Lake, Op. 20, TH.12 / Act 1: No. 7 Sujet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7059ca73d9b84f30764b3bd37b16fa5334de8ac3abd24fc736cf075a78c052. 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/GBF077540816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641d2cfdd04c6032d49a9e388a52b8617afa6fb4ab89c371ade5a2955a225b4d. 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/FRZ399301120.
Pictures at an Exhibition (Orch. by Maurice Ravel): 3. Promenade. Moderato commodo assai e con delicatezza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd985b54e9b6807534327b29bc0c2a08de1677a22e3b5fee832717dbe9fd62c30. 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/NLA507400455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec364be7492e4f0e6a019a24b7bd4f59dcdd0b42d3975a3a5d3d6453ded200f. 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/DEF056530106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4877206a2d6c8194defbe5680024c6110112e1de648ae7d04ae78d7e0f922a29. 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/JPPO01016780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41764af1800adec251cf2bf39060b6adfd2ff2b96384fd9e1a2fbd4b6957b756. 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/DEF059232023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071fb5117b43b833a7d77b0582c0d5aa020ba3b7df2f8d9ef1e886d8beb118cb. 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/GBF078110193.
12 Etudes, Op. 25: No. 9 in G Flat, "Butterfly Wings"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcae28d480a2fe8a90faac307955fa0d232322381bd890728144d34f8d85bb6b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/KRUM71100114.
Abendlied, Op. 85 No. 12 (Arr. Grosvenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe69905e2357cac62e5b153553e5468f5fa977b3ff940e59bcbb895693629334. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBBBC2201474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cca490acc5c06a3656375ea31d50be9f0f0cb98daacf2afa9c7228a74aab1c5. 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/ITB282100020.