thumb|Bonis at about age 50, photo Mélanie Hélène "Mel" Bonis (21 January 1858 – 18 March 1937) was a prolific French late-Romantic composer. She wrote more than 300 pieces, including works for pian
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 0x822e0e384eda946c84fc4b78fa2021173b27fc90f2436dd8814d6ba98ad9f126. 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/5d78cbeb-062e-41e4-b660-8b8fefd479c8.json and https://artists.proofprofile.net/proofs/artist/5d78cbeb-062e-41e4-b660-8b8fefd479c8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bonis: "Le songe de Cléopâtre" (L'œuvre pour piano à quatre mains / Les compositrices, Vol. 3)
Suite en forme de valses: I. Ballabile, Op. 35 (Mouvement modéré de valse)
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 0xc70a60cbc44c438d194f1afceb500fc1a01e685f430b59b8ae9663be35ed0656. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX401100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b3f3338f894fab8fdb6edb095e268190bfa2a6019272dca0753ed63caea36e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX401100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f7bbffb5152380725121d55440374efe9a4c9b1338240548e30930905ad85. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX401100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ef589c64ea157a26381d5b19dc7b92cdedf3e1842eff1e9dcc1a888066fb8b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX401100126.
The Echoes of Women - International Women's Day 2024
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76363ea00ba4923edb4fbd4d69fd95bf2312842c7ed5c1e01ce140a922257656. 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/DEN962335202.
Variations on a Theme by Robert Schumann, Op. 20: Theme
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Variations on a Theme by Robert Schumann, Op. 20: Var. 1
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Variations on a Theme by Robert Schumann, Op. 20: Var. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edb93d2f5398bf339eb86e4b929d3540fef5b2b3f85b2c233042941ddf0a9a3. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2201478.
Variations on a Theme by Robert Schumann, Op. 20: Var. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d66f5476327344ea6f19077f0f71622f8f00e7abf4465b94ec1ac5efb85b4e. 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/GBBBC2201479.
Variations on a Theme by Robert Schumann, Op. 20: Var. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05064a0205cf4be007521042d798711aba00fc9f5aaf0bcf165af8622dad52d4. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBBBC2201480.
Variations on a Theme by Robert Schumann, Op. 20: Var. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd7febb683199f12a7307aeff3b5d5ceee0cecbcb4bac105fe475ff892caa3. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBBBC2201481.
Variations on a Theme by Robert Schumann, Op. 20: Var. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12191e32e7a11cc3acbcfcefc1d10aff8bd0435b444c56cd1949c14b8f57ae5. 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/GBBBC2201482.
Variations on a Theme by Robert Schumann, Op. 20: Var. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427b9f530e633923463fcce4244694a9bf6e9a221659ca62b28e23e441794612. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2201483.
Miocheries, Op. 126: No. 13, La toute petite s'endort
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee65305a91668ebe98f3676bbb539cffa9b871a841d94449a88003a409388fd3. 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/DEN962302760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d49a8528e6bbc1abd806577b7d5681fc7ed44fbacc3c39067a86708321c338d. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/DEN961902441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91ff38d5a658ce6022eaaa7523162c79825d800012783a27498e6f8942d0d1d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962102900.
Wild Swans Suite - Version For Violin And Piano: II. Eliza Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa81ad662fef5c39f43b3461918800c2cfdc367a222ad6ab25710c50e1a293c9. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961201790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507d2c0d8976ac079891b30dce7fe32e5fb02acbbc4058880145210b27d542d9. 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/DEN961601440.
String Quartet in E-Flat Major: I. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ffb15b4b36dd6d9470bf08ea6458cdce8afd83b46706fd173556c58ea88672. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEAQ70900012.
String Quartet in E-Flat Major: II. Allegretto - Scherzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa729c8a57882951c9ecc801a1c2b2e4781e8b73e655e3e56aad98b202187e4f5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEAQ70900034.
String Quartet in E-Flat Major: III. Romanze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d51bacfe48885f72dac55f3ed1273782dbfb9c9a081f772c897c3e1f1583eda. 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/DEAQ70900014.
String Quartet in E-Flat Major: IV. Allegro molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499eb510498aef29587ac1d48220b63558cc96f6c440899bd8e79630619e36d6. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/DEAQ70900015.
30 Etudes, Op. 26: No. 10 in F-Sharp Minor. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd539d9e093e3df60d65fc6152e6b49fd9a353fd4cf7c6aa28b32a00a38226. 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/DEN962302730.
3 Romances, Op. 22: No. 1, Andante molto (Arr. Knoth for Cello and Piano)
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4 Pièces romantiques, Op. 30: No. 4, Romance sans paroles
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b27f1875de9b5a8d1bd104c6d273aeb832747bf71a97417c0cda12448f481f4. 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/DEN962302770.
Adoration (Version for Solo Violin and String Orchestra)
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Wild Swans Suite: II. Eliza Aria (Version for Piano)
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3 Lieder, Op. 12: II. Liebst du um Schönheit
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69008c19208bd222b3c82728731692fe44848a9bb5c9783e0858bc53f940e7fc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN962130205.
3 Romances For Violin And Piano, Op. 22: 1. Andante molto
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3 Romances For Violin And Piano, Op. 22: 2. Allegretto
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3 Romances For Violin And Piano, Op. 22: 3. Leidenschaftlich schnell
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd725c76d070c09129fde3e3e90c6605a14edb9972b40293ae8469c637acd2cf1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLC061504371.
Jezus Malusieńki (Reworked by Hania Rani & Dobrawa Czocher)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011148cf73d76205aaee4441eb99d444b3b48bfeaa021c1ad4c3bf2fb49781fa. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961902391.
Soirées musicales, Op. 6: II. Notturno. Andante con moto (Version for Harp)
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5 Lieder, Op. 10: No. 5, Bergeslust (Arr. Rouger for Choir and Piano)
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Piano Trio in D Minor, Op. 11: I. Allegro molto vivace
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Piano Trio in D Minor, Op. 11: II. Andante espressivo
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Piano Trio in D Minor, Op. 11: III. Lied. Allegretto
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Piano Trio in D Minor, Op. 11: IV. Finale. Allegretto moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b21637fbc77cf4398143ddc14be5e9fdfb418d9b6dd93dd769f674a8e5e5b73. 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/GBAJY2030708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3f894637c13c15a642c9b211bd774fcaa5d810d3551d8ef9881d47d5d57ab8. 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/DEN962130202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6162b90c8f073bb471e966330fc9636084802ac07414980538d37933b641076. 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/DEN962131411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e8e5fe52dc492d221b433c55b888e551e172f47b3c18a9df9586d2b9a2a0f7. 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/DEN962131410.
O virtus sapientiae (Arr. Sarah Kirkland Snider)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f8843e6b13cf359043728610f7b07df981db44750bbd29104f540499063e83. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962131402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1071c7712fdd27c37966206d3612a713df3b8aea2e7b6719864c99781b5af46. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2001833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45e5eaf0fe88710565abc87739d23279a8490d221453fef6a12f7d62d55931c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62217360.