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 0xf239a98e3f04a5ec57912b0f8d340d9bfb7c2b03788ced2b39e0a2455ac03f06. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62151e6a-52b6-4865-b150-5c97968938f7.json and https://artists.proofprofile.net/proofs/artist/62151e6a-52b6-4865-b150-5c97968938f7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Mondonville: Pieces de Clavecin avec Voix et Violon, Op. 5 / Sonata in B-Flat Major
Jacquet de La Guerre: Violin Sonatas Nos. 1-6
Violin Sonata No. 1 in D Minor: I. Adagio
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 0x902d96547581643b9afc64801236c1ca77002a8740160f21715c85598e502bf5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1491738001 — a six-check JSON result.
Violin Sonata No. 1 in D Minor: II. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37596ddb7a58df331e72a54177e058b5f5e2644993828c7e3ab4c7753927a519. 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/CH1491738002 — a six-check JSON result.
Violin Sonata No. 1 in D Minor: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799efc2f63e44fc8cc14e58df97932b1af57cfcd327661eb691dcd3ed9c9bc54. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/CH1491738003 — a six-check JSON result.
Violin Sonata No. 1 in D Minor: IV. Presto - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4733bc91e4c0c92238681de69398d63f40a0a45c1c5d5b204ba2f13bd22c25f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CH1491738004 — a six-check JSON result.
Violin Sonata No. 1 in D Minor: VI. Aria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab86e41cd282f2f45612c172b32bce8d596ceb4b5632447022d68cb272f984f. 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/CH1491738006 — a six-check JSON result.
Violin Sonata No. 1 in D Minor: VII. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c71e6ddc38753f9033ba5057db04cf55d773ae83683a7749a34d76464da09a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1491738007 — a six-check JSON result.
Violin Sonata No. 2 in D Major: I. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d5231419e6f43237700817f5bf18fed4a99bdd26fadddcff0980c1918e26e0. 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/CH1491738008 — a six-check JSON result.
Violin Sonata No. 2 in D Major: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bec90d44cfebaece5fa1bd3c203590d516a3e115aadd66d2d37f8ffe4f26806. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/CH1491738009 — a six-check JSON result.
Violin Sonata No. 2 in D Major: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaede65e0e97a5e6f6478e23686834fb05bdb87438eb367ad456878fbfcad7b. 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/CH1491738010 — a six-check JSON result.
Violin Sonata No. 2 in D Major: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4609e1489fb795103894534ba3dd00cc2f561557883cddf861626532509cfdf1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1491738011 — a six-check JSON result.
Violin Sonata No. 3 in F Major: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1712d25111e221d29828d7d14dda6a236733c0ab09fc1f36bd2803cb8d88a7f5. 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/CH1491738012 — a six-check JSON result.
Violin Sonata No. 3 in F Major: II. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0096a2b95819d7d75734904b91dfdb0310da25bbb505b900cc7f120af0a8a5f5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1491738013 — a six-check JSON result.
Violin Sonata No. 5 in A Minor: II. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc19e53ff49a4198a27b2782c6a240208426ad7b32f7d0155b077e35fb2a77da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1491738024 — a six-check JSON result.
Elisabeth Jacquet de la Guerre: Sonates pour le violon et basse continue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bcd3fb1825ada2008a684b99deaf4dcfaed8c9a44347477ebb8cc81709423f. 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/ES54G1211401 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fa4732d608583166c81fcb041fea6b92b093dfadf62b24ebea936be2081c6b. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/ES54G1211402 — a six-check JSON result.
Violin Sonata No. 1 in D Minor: IV. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9602f796f1ab1aee532c422235ff1f9894023495b3cda6efa95faa4c5ec0c4ac. 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/ES54G1211404 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5824d172edcd28f9331908c3f21aaebcfdf28d58c678c4ca1fa1f1f4087ecb. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES54G1211406 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08b00c31cf4630bbd8e02e4b85f5b941d320536cffb26c78bdaabb6f9a7a175. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES54G1211408 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1cae92e50925353bbb79a97c8e1b3b2bade09772d6d6e559a086774c10c3d5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES54G1211409 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d094ca0263a3956338102f4d57e14988f650192e728c6573c96a69844ab11c9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES54G1211411 — a six-check JSON result.
A Cleare Day - Pieces from the Fitzwilliam Virginial Book
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16325c038d889b87b6f3c96b8b6b7d4973faff26284d12671a5d5e00b818189. 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/FRPP80502120 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fa4c727b7478569fe85c87b52b0498192de0d30f43f2bfcb846f81df78bd47. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRPP80301060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d72b6aada8abe89c641d74503fcaa17d1f4b2147339a8403b8ee5792ad4179. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRPP80301070 — a six-check JSON result.
Les Indes Galantes: Gavotte pour les Fleurs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0886ffe64c2a2482ace14bf17fef87ca4f65693e44e43f5a4153013c57eeec52. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/FRPP80301260 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4834ef922180ebf8833d571e683708037aa8183e2352fae1817e2baf4f4625. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRPP80301320 — a six-check JSON result.
Trio Sonata No. 2 in E Minor, BWV 526 (Arr. for Flute and Harpsichord by Sooyun Kim and Kenneth Weiss)
Trio Sonata No. 1 in G major, BWV 525 (Arr. for Flute and Harpsichord by Sooyun Kim and Kenneth Weiss)
J.S. Bach: The Art of Fugue, BWV 1080: Canon alla duodecima in contrapunto alla quinta
Trio Sonata No. 5 in F Major, BWV 529 (Arr. for Flute and Harpsichord by Sooyun Kim and Kenneth Weiss)
Trio Sonata No. 4 in A Minor, BWV 528 (Arr. for Flute and Harpsichord by Sooyun Kim and Kenneth Weiss)
Trio Sonata No. 4 in A Minor, BWV 528 (Arr. for Flute and Harpsichord by Sooyun Kim and Kenneth Weiss): I. Adagio - Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71669d1cb6310cbbd285aade6cf03a93da2ffe1de29c7f0b04db3e33ef19d76e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2576504 — a six-check JSON result.
Trio Sonata No. 4 in A Minor, BWV 528 (Arr. for Flute and Harpsichord by Sooyun Kim and Kenneth Weiss): II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909b8cae10a9c11ad2368de9e1ad1154d62d3b397b0ce9026411fa74b1bd0b5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2576514 — a six-check JSON result.
Trio Sonata No. 4 in A Minor, BWV 528 (Arr. for Flute and Harpsichord by Sooyun Kim and Kenneth Weiss): III. Un poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e878c833bdb557207e1a18d95812a6c896c74b9537bb33959f44911499b234. 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/USLZJ2576516 — a six-check JSON result.
Trio Sonata No. 3 in D Minor, BWV 527 (Arr. for Flute and Harpsichord by Sooyun Kim and Kenneth Weiss)
Music@Menlo LIVE, French Reflections, Vol. I: Baroque Tableau