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 0xb8c810e637b6cff6e85e659751755a6d020f657c9b8ba96519951b5a230d435f. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbf50156-a54e-4cb6-9a1b-36a2d8c77686.json and https://artists.proofprofile.net/proofs/artist/dbf50156-a54e-4cb6-9a1b-36a2d8c77686.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
The Battle of Killiecrankie: Love & War Songs in Free Scotland
The Braes O'Killiecrankie (Arr. by Sylvain Bergeron)
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 0x60f7c58aa22327d94d4044e67add90369f3f7a684f66bac427e213afc3eadfbc. 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/CAJ720751018 — a six-check JSON result.
Sacrum Mysterium (A Celtic Christmas Vespers)
Sacrum Mysterium: Part I "A Light in the Darkness", Duan Nollaig - Scottish Gaelic Carol, From the Vespers of St. Kentigern, Patron Saint of Glasgow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a02ede38b84a48c0569e1360474cdb4b1aa8f9312775703dc1114dc4274170b. 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/GBELX1204407 — a six-check JSON result.
Sacrum Mysterium: Part I "A Light in the Darkness", Deus in adjutorium - Alleluia - Scottish Gaelic Carol, From the Vespers of St. Kentigern, Patron Saint of Glasgow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053ac790f6dd3d7cd24cea267d867f951d58574dbfbe138fc471e00069ca5b18. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1204408 — a six-check JSON result.
Sacrum Mysterium: Part I "A Light in the Darkness", Responsorium - Gloria Patri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ba7d8ceabc6d2b1e5c2d9bab2cbe5c56c5749af5c749ec1d57ce84962dd882. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1204409 — a six-check JSON result.
Sacrum Mysterium: Part I "A Light in the Darkness", Hymnus, Iste confessor Domini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47679f18d0e524fd0fea76bdc38b464cd298791d0b3b6d41fc4b368e640867e7. 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/GBELX1204410 — a six-check JSON result.
Sacrum Mysterium: Part I "A Light in the Darkness", Alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61535515bf83556401e21b034adc8b5f75bce1a1db9d6389cca008c250d96b80. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBELX1204411 — a six-check JSON result.
Sacrum Mysterium: Part I "A Light in the Darkness", The Road to Lisdoonvarna - Tradtional Irish Jig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb69899b7443db7f26adb57026a938850c287d28351c7fd0691ae15a2011e1a. 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/GBELX1204412 — a six-check JSON result.
Sacrum Mysterium: Part I "A Light in the Darkness", Veni, veni, Emmanuel - 12th-Century Carol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d037b11ee7d0056135a7c5c03e1943102495c1842771a6ac182317ee2c6690b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBELX1204413 — a six-check JSON result.
Sacrum Mysterium: Part I "A Light in the Darkness", Noël nouvelet - 15th-century French/Breton carol, Oxford English Text
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c92ad540cc89252c8919d909b8685ed3e9689e7ef922a2a62937b3d074cd3a. 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/GBELX1204415 — a six-check JSON result.
Sacrum Mysterium: Part I "A Light in the Darkness", Sussex Carol (On Christmas Night) - Traditional English
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244ac3157908391f3dbd0b5ff700e8f76b80807a95934f24befabee9edd27921. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBELX1204416 — a six-check JSON result.
Sacrum Mysterium: Part I "A Light in the Darkness", Come, My Children Dere - 17th Century Scottish Carol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484dbbf0098761ca9000e3f75171b9f0cf2733696eff02693bfde3585b4e6651. 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/GBELX1204417 — a six-check JSON result.
Sacrum Mysterium: Part I "A Light in the Darkness", Wat ye What I Got Yestreen - Skene MS, Scottish, 1715
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1929ba204e39db2ef968d815454fd41fc5798fb176244701c9abdb7f2f23d766. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1204418 — a six-check JSON result.
Sacrum Mysterium: Part II "Song og Mary", Taladh Chriosda (Christ Child's Lullaby) - Scottish Gaelic Lullaby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5931f7cb86a9fb985465392fde84c9a033d67d68f135cf68306f04fdac52b32. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBELX1204419 — a six-check JSON result.
Sacrum Mysterium: Part II "Song of Mary", O'Carolan's Cup - Manx Gaelic lullaby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f525081c1b8b6df8dc11e4557ab21d7f469a2e445fb84aeddedc4fc9e59fd7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1204426 — a six-check JSON result.
Sacrum Mysterium: Part II "Song of Mary", O Carolan's Favorite Jig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db83344cb520cb72818cbe48f5c1df20d70bc017601c0502e4fcfbcbb7d7530. 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/GBELX1204427 — a six-check JSON result.
Sacrum Mysterium: Part II "Song of Mary", At Work on the Land / Tatter Jack Walsh
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733504d7cb112c667a99bc69709361d6481fd5dfc14155f1f1975e557d16f5f7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1204428 — a six-check JSON result.
Sacrum Mysterium: Part II "Song of Mary", The Seven Rejoyces of Mary - Traditional Irish Carol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088b03fe1869409097e3e0777da1d6731312afe5a0a692bd2614a21be82af0f9. 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/GBELX1204429 — a six-check JSON result.
Sacrum Mysterium: Part II "Song of Mary", Postlude, Christmas Eve - Irish Reel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95084842b0c307ff113a0a1d23b83f21a439806897c438a1611a65a8003a6dbc. 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/GBELX1204430 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc989de556a6c5ef1b537a3f61f5464fc19b75cd6a3e4f86e140f9f6cf4c7e94. 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/CAJ720425801 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2bc9e393a509437553049ed8924e32f435bf8d65dcb2a5964ff34db8d57bee. 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/CAJ720425802 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbac985a571c9114060628ba4d5ee575f17ebc9c166268f2d7a642638a3526e. 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/CAJ720425803 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7ec4edf365a9b061b74ba90a0af8c826a42ebca3ffedad35bea28aa85c2e72. 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/CAJ720425804 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d513ddec03771218f7bbab42240aedd553add57e9a10b647b8276812290a3c. 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/CAJ720425805 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa192bfbe7d39522be87b9f9bcd1986460aaa1d634253b5d465060da7c05f5b9. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/CAJ720425806 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0fa8547706dc96ed22307f89e901e3e044335bd10c0627cb4094784425020e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ720425808 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f3db9e19d221e78bb31fa1cbf0c0f5fb8e9a1ad20960597df2a8508cda1eb. 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/CAJ720425809 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ba6f8e3e82a1a6ae0ba5d57b2115a40618087f4253527f82157136344b3b74. 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/CAJ720425810 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb487637bf9fb6391483e22f4cf72ec8dbbb323e3a417f4e9d5f889ad5b5c661b. 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/CAJ720425811 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1482ba156a87e022d5c52b91e2945a3b9473717fd14c01084464669c059f018f. 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/CAJ720425812 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d768524f5678f259a2d85b37ca761a0ec4b06cb6834f073803d659a0fa7656. 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/CAJ720425813 — a six-check JSON result.
En montant la rivière (Arr. by Susie Napper)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0b944b7dc50892e6a3a6c192c3c3ebc0864166055cdfa10eac000f82e91785. 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/CAJ720425814 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96083355ce685f10fb29fe2f85c7290feace5a660ad08296f11475c6ba333734. 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/CAJ720425815 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e54f98f35e9c25671c369ac8599973fc39e2c79fdb4500c284a13e946993c5. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/CAJ720425816 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be032dc10fee559db327034645ee6eac471ea7d346d3135d3053ee63fd74c16. 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/CAJ720425817 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8624b86466b0a5e9972faf94f48529524312d9e3bdbf232d582e5560ca65f167. 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/CAJ720425818 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7829fdc32412db978a560dea597977d303b4056dd07725b3ce10e52199b76b6f. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42309602 — a six-check JSON result.
Bach, J.S.: Oboe D'Amore Concertos / Sacred Arias
Boismortier: Sonates pour violon, Op. 20
Sonates à violon seul avec la basse, Op. 20 - Sonata seconda: II. Corrente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc2c46067695728ed44a80be64caa088bebe8fc5ff925ad82256aa6008b1b0. 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/CALC41800506 — a six-check JSON result.
Boismortier: 6 Sonatas for Flute and Violin, Op. 51