Hélène Schmitt is a prize-winning French violinist and a professor of baroque violin in Boulogne-Billancourt. Schmitt first started out as a chamber musician before specialising in baroque music. She
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 0x49292543bf7d88ebdda9e9dca5751172ba6dca18206697beb8367cde3876a2c2. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b93bff80-61ac-43d4-a4ba-5825df91accf.json and https://artists.proofprofile.net/proofs/artist/b93bff80-61ac-43d4-a4ba-5825df91accf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jean-Marie Leclair: Quatrième Livre Vol.1
Florentine Mulsant & Pisendel: Works for Violin
Heinrich Ignaz Franz Biber: The Rosary Sonatas
Mozart & Beethoven: Sonates pour pianoforte & violon
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 0xe4e0ccad616b234e59252212fc20638b9baf9beb9fc7b749d52c88b2ea749378. 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/FR50X0814108.
Suite in C: V. Diverse bizzarie sopra la vecchia Sarabanda o pur Ciaccona
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b319987b2ec0a7357a08e3e428cbcc11dbd57e00a4968ec7217b4ecdcc1b1e. 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/FR50X0814110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ae5d8c1efcf739990ebd054545483105b2cf5992105ece43ea3a3423bacb75. 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/FR50X0814113.
Suite in A: II. Aria con divisioni, allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39398bf5f16539774d6f114cf8e7d911023634be669090bee4d382ed8a9b3e44. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0814102.
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 0x949368af7e1e9f9a85d6946edaba4ce0ff1ce1e1a37e307123f6023361ad04cc. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0814103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92be0bfdc51fff65a226730a4ae86b9b8abea54b805ca20418202c6e25886e54. 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/FR50X0814104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2dbe38acc61938a25dcc13e0ba4053260e300a33c389d1ab9209996d72040e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0814109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feb6b0d52e2e95bd418b6a4e9f58cad9d4cf6148a1cf3b8335ab60ccbfd9cf3. 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/FR50X0510901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6b4e83079587086e100351acc3d429cefd25ddf240b419a2cbdce048971114. 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/FR50X0510904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028a6b232645e320f9333556567df2a0835c41abc90463f2b230c020a072a61d. 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/FR50X0510906.
Sonate in B-Flat Major: II. Presto e adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d63789d50beae989770e0575fdc0c52317c257cb00e7ba5313e2249e2455b9. 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/FR50X0510908.
Sonate in B-Flat Major: III. Fantaisie sur une basse obstinée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a00f965f8259520557334df420b110927d18ff2ba814a32a2988f9bb9e30d4. 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/FR50X0510909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044fa9ae408e9e7fa6ad6aa9f5621c8d3bdcd17cef829343ec1ef3b6dfe622fb. 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/FR50X0510912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4a0fd271ccb931a5139e291a80700843b4ee5df22a9c3b672bab1929eed1ff. 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/FR50X0510915.
Sonata quarta in D Major: V. Adagio e recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f6bd616179b75f4a16027add7814e5bec1737f851007b5f820b2fff982f7cb. 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/FR50X0510916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9da816d0d10c2ca3cf8f28bd3e083d7a2bd3f7f821b6a4c61a802cfb13a202. 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/FR50X0510921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa581601442b754aeb2bb5e8a3e66737b305e791421451b54459539ca6121f3c8. 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/FR50X0510923.
Sonata quinta in C Minor: IV. Aria e recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bc1d59b88089a5b8c0262c3b2a0d788f983b9fffd5ae1d909c2a33580a2895. 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/FR50X0510928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb05ae226b272aa896051e0bb663f27afc905fdb959f91cd9098c1f65d44746. 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/FR50X0510929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7029451bb7c57454d5d9519bf68a8b4678d9817bd42e6a59e7993fb34a0c398a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR50X0510902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36609416f7f504edb71819a63eb02b28d383f4f7f871c73396f409470a084ca9. 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/FR50X0510903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e0377aa6a23679a97d4a305770b0f59a158a7f081524fbb4aba2fa5b2dd523. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0510905.
Sonate in B-Flat Major: I. Grave (e recitativo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c87cf549d98a355784c29968674c1b5e20943968f39b028611d1f0c22e1fc5. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR50X0510907.
Sonate in B-Flat Major: IV. Grave e Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037f6d35a0f415cc15011fe77115710590900802a920f0686dbfaffd13631d30. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0510910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299e80b2e56a43f3ce0374a4d880c91d46384b940b59f18fb847e922c38ffc8f. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0510913.
Sonata quarta in D Major: III. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f7e18c3f3230cdfc56a82fbe463ad2997c9def220815925e76503cf4ac25f5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0510914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66b090717600cbb28bc3ab559f3c3571b57d7278ff8250785485d06145b8fa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0510917.
Gigue dite Pfefferstossl a violino solo senza basso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5763144fb5a0a323c2a8a774496bfcf928568d56934300483943e5eaebc5d334. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0510918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ab4a0ea8f9a2190fb01e336641381667fde1fce4e857cb08e8dfa22dfc5145. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0510919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a2b56b654be11b3c57f0440e5fa40efc5ca920cadc826354ce6775cfe39a59. 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/FR50X0510920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca00fc5f11f64b2c19935de8cb54863eaf9ae877b089e2a03673b53365f8733. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR50X0510922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b888aed99282041af0e7680ee8e890ea2589128ebb660d639ab087589a1959. 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/FR50X0510925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8921f20a6a01ed00b2ecee07ae2903230ceb8242a66a6ea8bde65da679b14c. 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/FR50X0510926.
Sonata quinta in C Minor: III. Adagio e recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61645985b3f95dfbe8fa8965ea73d89577e3f687e169d77ae6c82984b30634e. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR50X0510927.
Sonata quinta in C Minor: VI. Recitativo - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13575627eaf67dc96a1dd2f33900b8e8f2b4be6f90f55a36a4e0c9d859784efb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X0510930.
Carbonelli: Sonates pour violon & basse continue
Albertini: Sonates pour violon & basse continue
Bach: Pièces pour violon & basse continue