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 0x36e8e3833603c84401657a4dc304cd86b48b2f883f5f5bf2f75fede5c67b340b. Chain 2 (Bitcoin): anchored in block 954047 (2026-06-17T04:56:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/417a8fd7-e890-48b2-959e-02b726706777.json and https://artists.proofprofile.net/proofs/artist/417a8fd7-e890-48b2-959e-02b726706777.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Blanchard & Colin de Blamont: Guerre des Te Deum
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 0x951b24307dfa51e371bc644cf3efbbbc84769b5b952388ea9de77e062b648934. 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/FR9W11827275.
Te Deum Laudamus, FCB.001: Te Deum Laudamus, FCB.001: IV. Sanctus Dominus Deus Sabaoth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1098b7788b94e4ced449b5565f8506c2e9d8539abff46b3d6a05a618b639fc6d. 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/FR9W11827290.
Rameau: Dardanus (Live Recording at l'Opéra Royal du Château de Versailles)
Charpentier: Missa Assumpta est Maria, H. 11: XVII. Et in Spiritum sanctum
Missa Assumpta est Maria, H. 11: XVII. Et in Spiritum sanctum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719b28889475cdad61ae73aa73478762aab225c1872b224a8b98f4827e63a8ce. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FXR522415017.
Missa Assumpta est Maria, H. 11: VI. Et in terra pax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2496a9e0658f15279f49380a514eeda6c4ba422de6ef80c4b048bc6358fcee32. 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/FXR522415006.
Missa Assumpta est Maria, H. 11: XII. Et incarnatus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cd1e15d4b7e93d7af4d59c05ccb67da0ae2862657af2b365425018968ecf76. 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/FXR522415012.
Missa Assumpta est Maria, H. 11: XVI. Cujus regni non erit finis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a04630963eb4506c41e7cbd3cb734cba2490265bafbff7a0ea6ae661f431a0f. 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/FXR522415016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719b28889475cdad61ae73aa73478762aab225c1872b224a8b98f4827e63a8ce. 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/FXR522415017.
Missa Assumpta est Maria, H. 11: XX. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782078a1cc14fb3abc39905a17503eaf665de3dcc32acc6309e71e8fa479ada. 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/FXR522415022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0270074eb1bc45e0b8369bd95901615e25dfc6ceaa9f11f44a9a3edf532c41e. 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/FXR522415023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b57b01ef6d954b6d05a5d4bc7ab27eab571984e85502dab87e5e8bae9d8a4f9. 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/FXR522415027.
Motet pour une longue offrande, H. 434: II. Paravit Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7ad4fae0c96202068d8473d5da424a9c3b3720189ac769b73d0fa333d67fbc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FXR522415029.
Motet pour une longue offrande, H. 434: IV. Pluet super peccatores
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2c17dd4735ef03495a8607b84a03376d5ec9ccb57c7a1a0a865070389db2b9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FXR522415031.
La Vierge à la Crèche - Chants de Noël (Dir. Romain Champion)