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 0x54a593bd66670353911bdb876d98fc52389e718639aa8cd6405c04191e598acc. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9898870f-40da-4963-9d57-ba1ac202c971.json and https://artists.proofprofile.net/proofs/artist/9898870f-40da-4963-9d57-ba1ac202c971.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Henderickx: The Convert, Act II Scene 8a: The Ritual in the Desert
Henderickx: The Convert, Act I Scene 2d: The Prayer
Céphale et Procris, Act I Scene 2: Vous méprisez la jalousie (Dorine, Procris)
Elisabeth Jacquet de la Guerre: Céphale et Procris
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 0x2f09e12c7bd6d53c492518ec1b88786791bd65a5da5ce63504b705aa48bf0762. 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/FXR522311925.
Céphale et Procris, Act I Scene 2: Air de Procris. J'aime, il faut l'avouer (Procris, Dorine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd22153d7e098890d3e7986fa9c035e10ed5a5180b3d5105ec36f3d3655d9a9. 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/FXR522311926.
Die Auferstehung und Himmelfahrt Jesu, H. 777, Wq. 240, Pt. 1: No. 7. Aria, "Wie bang hat dich mein Lied beweint!" (Soprano)
C.P.E. Bach: Die Auferstehung und Himmelfahrt Jesu, H. 777
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b24e79827e5d71dffd3374734162c694bd857ccb7fbf5540999b807fb6ed44. 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/BEE022211507.
Die Auferstehung und Himmelfahrt Jesu, H. 777, Wq. 240, Pt. 1: No. 9. Duett, "Vater deiner schwachen Kinder" (Tenor, Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b7cd183c64ccd5446b8306e51944c4fe3aef5fb7ff12aeca88ea96d521d681. 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/BEE022211509.
Atys, LWV 53, Act II Scene 3: Tu t'étonnes, Mélisse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281b453dda8c9a586ed93ffe4d630f20cb9b052ae88c19babadc3f31069eaba1. 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/FXR522411314.
Atys, LWV 53, Act III Scene 7: Qu'Atys dans les respects mêle d'indifférence !
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63a77fb9a3114502ed96d974f9ff76c75db1d0b7c2e4837a2b5ba4c221ecb19. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FXR522411328.
Céphale et Procris, Prologue: Air. On voit dans ces plaines fleuries (Flore, Pan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5328587a35a18ced75ddd17015fc64d9822102d61449bd03086cef0df49181. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FXR522311903.
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
Céphale et Procris, Prologue: Duo. Chantons, chantons sa valeur immortelle (Flore, Pan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dc1b8b204dafd41303d6d63a3e5c66bca29769112633ad2114061c3fffc04e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FXR522311904.