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 0x7be476208f43ce6169dc5ed7c48db3fd679dd88ac0f2a28e7bfed6ea5cdf6b9b. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d147238c-8272-4866-bc6e-07c32e465dcd.json and https://artists.proofprofile.net/proofs/artist/d147238c-8272-4866-bc6e-07c32e465dcd.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Télémaque & Calypso, Prologue: Ouverture (I)
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 0x95fda20785437291d6c0b634298e517fa060ed70c41d4275169b4cea8456b38b. 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/FXR522412801 — a six-check JSON result.
Télémaque & Calypso, Prologue Scene 1: Descendez, régnez sur la terre (Les vertus, les muses et les arts)
Les Chantres du Centre de Musique Baroque de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb713d99e8323f8ef4a5775b49d07c138f2ddd6e5984b52a4e43f194be647383. 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/FXR522412805 — a six-check JSON result.
Passion selon saint Jean, BWV 245: Herr, unser Herrscher
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa91cc7297b9d61f53b0e0ad46593c7561c127e6a468d6b4f0c9a7256df08ae. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRU621427701 — a six-check JSON result.
Stabat Mater: XII. Quando corpus morietur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce69462e7721c7774bc5985a849c6ac573cfe82a8895a46c1b9fe9a5ec220163. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FRU621427702 — a six-check JSON result.
Stabat Mater Pour Contre-ténor Et Orchestre en Fa Mineur, RV 621: Stabat Mater dolorosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd65ea35c2df2076850a055c096d97e40acac651be9030db6f194578ae2308a6. 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/FRU621427703 — a six-check JSON result.
Stabat Mater Pour Contre-ténor Et Orchestre en Fa Mineur, RV 621: Eja mater
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725340f6872941639d1a18062b5fb39d65343040bb6d93be5488f9f991635e7a. 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/FRU621427704 — a six-check JSON result.
Cantate "Ich Hatte Viel Bekümmernis" BWV 21: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86f85ba31e87ca2ffef5c1d592b9cd7fe46a08b6cc3f25c37de40b9da768c92. 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/FRU621427705 — a six-check JSON result.
Sonata seconda en Sol Mineur, TWV 43:g1: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f2bf2af19f56e66c78058b4da81bc24702dd50d7cf0a0244888167a9387476. 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/FRU621427706 — a six-check JSON result.
Sacred Aria: I. Ach wie sehnlich wart' ich der Zeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00c1f65e117acffd0d3fb023b42fde0b42c66498450a940e962c15037884ff6. 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/FRU621427707 — a six-check JSON result.
Concerto pour clavecin en Fa mineur, BWV. 1056: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386c4fd1794405bd6e1846678a532a07f9420c1bc517abfe8ce72245079a56ce. 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/FRU621427708 — a six-check JSON result.
Concerto en La Majeur pour hautbois d’amour, cordes et basse continue BWV 1005: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab3015de9a22104f15e480f5036fca410a2933c635278e57cb3d72de36a7051. 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/FRU621427711 — a six-check JSON result.
Messe en si mineur, BWV 232: V. Crucifixus etiam pro nobis
Ensemble Vocal et Instrumental de Lausanne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7269068a27e427fd8033b5c89a1d74934a110321c471ccb13c5abd8f7525151. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRU621427712 — a six-check JSON result.
Tombeau de Sa Majesté la Reine de Pologne, BWV 198: Laß, Fürstin, laß noch einen Strahl
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bb64c659c7228ef11b6079e1d352ba86d9be65cf7264142e2ab6c65238ef6c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRU621427713 — a six-check JSON result.
Cantate «Christ lag in Todesbanden», BWV 4: Versus II. Den Tod niemand zwingen kunnt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77abdce8e521db4b97f3f1721a193d0ecb03c59a169d1dd164fbe1d86c96b8b3. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FRU621427714 — a six-check JSON result.
Quartet No. 2 in D Major, Op. 8, W.B 52: I. Andante. Rondo Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10127ec6519574865e595f57f2936d3444f8739dc77bb078c8b98add84309780. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRU622258401 — a six-check JSON result.
Quartet No. 2 in D Major, Op. 8, W.B 52: II. Rondeau. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe078c03b2f29a88b77019aefa7038b5c7db645045df3a7d1fc871af316f60c2a. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRU622258402 — a six-check JSON result.
Leçons de ténèbres, Troisième Leçon à deux voix: I. Jod
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c793d726b5a9598c112c517b1aecea271021a8578fc3fa3c477cc4f9db72fc. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FRU621835812 — a six-check JSON result.
Leçons de ténèbres, Troisième Leçon à deux voix: VI. Jerusalem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc69f61f795ba64d5fdb29595196c14dad7f64d531804990e30615ec5c48b8c4. 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/FRU621835817 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447d0ec9ac0990bc3048ffa3bcb9e1658cd4fad220dd46dfb4df58459144baf3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRU621426015 — a six-check JSON result.
Six quatuors à Violon, Flûte, Viole et Basse Continue, Sonata No. 2 in A Major, TWV43:e4: I. Soave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73fabef9d63a674a7dc5c15b47ad87d6c025f56d5154f409e1109288062db00. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRU621425501 — a six-check JSON result.
Six quatuors à Violon, Flûte, Viole et Basse Continue, Sonata No. 2 in G Minor, TWV 43:g1: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8694917ae0694f48c802288500191f93aaf034fa97a900d279cfd18bcebc7a. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRU621425507 — a six-check JSON result.
Les Nations, premier ordre "La Françoise": I. Sonade (Gravement - Gayement - Rondement - Gayement - Gravement - Vivement - ir, gracieusement - Gayement)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f8eddbd249d157002f45f27fb52f946fd7a7efd424ce34466ba126e5bde85f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZDG1200830 — a six-check JSON result.
Couperin & Colin de Blamont: Concert chez la Reine
27 Pieces for Bass Viol, WK 186-212: IX. [Prelude] in D Major, WKO 194
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b31271a87caae534692526720edde774f1c6287b4a02353b751f648cc203aa. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRU622258403 — a six-check JSON result.
J.C. Bach: Quartet Op. 8 No. 2: II. Rondeau. Allegro Assai
La Folle Journée 2019: Carnets de voyage
La vida breve: 1ère Danse espagnole (Adaptation M. Laignelot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28cdcc1e90d6a6c517ec76daa5d137c21ab1dc6183bf94d7dd919b5c8f87914. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRU621845804 — a six-check JSON result.
Destouches: Télémaque & Calypso, Act I Scene 6: Deuxième air des démons et des magiciennes
Bach: Violin Partita No. 3 in E Major, BWV 1006: I. Preludio (Arr. for Viola da Gamba by Margaux Blanchard)
Bach: Sonata for Viola da Gamba in G Major, BWV 1027: III. Andante