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 0xd848633ba18ea27a610fbf5e653714beaa27082c37e492b094dbb2e7da3cdcc6. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a56fcc8-0432-48f6-a010-9f538e71b426.json and https://artists.proofprofile.net/proofs/artist/6a56fcc8-0432-48f6-a010-9f538e71b426.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Pièces de viole, Book 2, Suite in E Minor: No. 96, Prélude
Marais: Tombeau pour Monsieur de Sainte-Colombe
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 0x2f7f836b4cff95be0c4827bb58c9a7488f25aecad7e70979579dbd3ec0a4aaa7. 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/FR7JM2291010 — a six-check JSON result.
Pièces de viole, Book 2, Suite in E Minor: No. 102 Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7596b3191f8c34f4314c836a7a1b792227184eaaec7201a804b85aa3ce86e1. 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/FR7JM2291040 — a six-check JSON result.
Pièces de viole, Book 2, Suite in E Minor: No. 98, Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc663fe16ce7e54204f75edeba0690a03300444f4cf6b049ca7401e6f304f9a. 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/FR7JM2291020 — a six-check JSON result.
Pièces de viole, Book 2, Suite in E Minor: No. 101 Sarabande à l'Espagnol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb235b3b2c036b27a3892bfc15a104a29e99f87c14695c8a901136629268408ef. 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/FR7JM2291030 — a six-check JSON result.
Pièces de viole, Book 2, Suite in E Minor: No. 109, Tombeau pour Monsieur de Sainte-Colombe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886dd1d65ad44ace28fcd05eaecee1cbfb4e43ea93c3b22bdde77cca4fc42a6e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2291050 — a six-check JSON result.
Pièces de viole, Book 2, Suite in G Major: No. 82, Chaconne en rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24800633447191f837542182f8a97188b2b3fb673ffa889df87d89331a30f61. 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/FR7JM2291060 — a six-check JSON result.
Pièces de viole, Book 2, Suite in D Minor: No. 22, Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00fc9c72a0ddda72c0f0cb939d09d8ef80f73ab4f088a8567b15a2937757aee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2291070 — a six-check JSON result.
Pièces de viole, Book 2, Suite in A Major: No. 142, Fantaisie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664779f47386a0fae28cc4d12d49aeadfee5049b459722161caf554c40edf3df. 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/FR7JM2291120 — a six-check JSON result.
Pièces de viole, Book 2, Suite in D Minor: No. 19, Ballet en rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068f9495e996ddee6dbdc9eb4b49b01ebe8f672a47be006fe63ee0091da23ef8. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2291080 — a six-check JSON result.
Pièces de viole, Book 2, Suite in D Minor: No. 38, Cloches ou Carillon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cb130d05e2c798df47c6011126698c7a5237f454a42587b351233d2b760321. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2291100 — a six-check JSON result.
Concert XLIV, Tombeau Les Regrets: Les Regrets - Carillon - Appel de Charon - Les Pleurs - Joie des Élysées - Les Élysées
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584cccae46edf5e6a0376acbd22db352171c819020930e946f6c12ce5a4f8474. 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/FR7JM2291110 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2909c0861655a409bfd7c5122d31da07eb53ee4e3033984bcf78e2b22e70d2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR7JM2291130 — a six-check JSON result.
Pièces de viole, Book 2, Suite in D Minor: No. 40, La Polonoise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae977745c04e18f57ebb9e0c9c31f05ba84b3eeb2443f32e9ed914571bf7b44. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2291090 — a six-check JSON result.
Pièces de viole, Book 2, Suite in D Minor: No. 20, Couplets de Folies "Folies d'Espagne"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9e2bd7b0786d46d1a578518ef1c8564767fed822312639a6f0548c741c2ff5. 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/FR7JM2291140 — a six-check JSON result.
Pièces de viole, Book 2, Suite in D Major: No. 63, Les Voix humaines
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bcf805ed981ae2d7a326e331fedc220f0ed34033f1602dfbce8bb8ba65fd89. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2291150 — a six-check JSON result.
Suite pour viole et basse continue en Sol: I. La Bergeret
Louis de Caix d'Hervelois, in the footsteps of Marin Marais
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d72b4ba3111d4ddbb9c3d254db7e2f165b662ed890360b6cd80e9b0b91113a. 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/FR7JM2150010 — a six-check JSON result.
Suite pour viole et basse continue en Sol: II. Le Biron
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5280bbc7baece95d0d2a164d6ffcb4e108a1a763786614feaef8cd291e5b127e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR7JM2150020 — a six-check JSON result.
Suite pour viole et basse continue en Sol: III. La Quinson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810ccacf1c70ab9937c069bf75bf7af8e95c3e7c43080456f296061b3d37f1d3. 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/FR7JM2150030 — a six-check JSON result.
Suite pour viole et basse continue en Sol: IV. Tambourin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa83ac5a3f3c59fe1e0d2a780f53ba38b48b6ec86e1c8a9e57628886b3c98e7. 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/FR7JM2150040 — a six-check JSON result.