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 0xb8fc603e6219f3ee6a488ad3ddf6b584986ca5ce8ee118487cfa45ac8b2de256. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90fa2a24-19da-4169-8bf8-c9d0c9a9f5de.json and https://artists.proofprofile.net/proofs/artist/90fa2a24-19da-4169-8bf8-c9d0c9a9f5de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x16a71f62d016ccbf5ef719a8a7a473baaadff4e179e79a3510def6235aebefdf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4212400141.
Pastorale sur la naissance de notre seigneur Jésus Christ, H.483: I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efbb99f9a606b3458a79703cfa76e5ca88d9f2ab61881d7dbde1cc55e9967ed. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4212400142.
Pastorale sur la naissance de notre seigneur Jésus Christ, H.483: II. Première partie, scène première "Que nos soupirs, Seigneur"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4c3fa5a67aaef1fd7b0459fff4d65e4aacd22a6468596959c73f13c08f2b82. 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/CH4212400143.
Pastorale sur la naissance de notre seigneur Jésus Christ, H.483: III. Première partie, scène seconde "Régnez, calme profond"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f1d68aa9224be5198612e362932de43dd4ff6919fe9cdfc0e9df194a39392d. 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/CH4212400144.
Pastorale sur la naissance de notre seigneur Jésus Christ, H.483: V. Première partie, scène 4e "Gloire dans les hauts lieux"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf371f9aa6e3a74af041f89d2ceba101bb39ee9f71103869c744568bdaee550. 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/CH4212400146.
Pastorale sur la naissance de notre seigneur Jésus Christ, H.483: VI. Seconde partie, scène 5e "Pasteurs, éveillez-vous !"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e36f9f2b16af63cd1b634be534e6fbd7de190112e2d3bf5639910f776cb6e4. 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/CH4212400147.
Pastorale sur la naissance de notre seigneur Jésus Christ, H.483: VII. Seconde partie, scène 6e "Joignons nos flûtes et nos voix"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc600136813bd48649cb7c6ddc1d528a06eea6c5e14c20db95f059cbbaa7900eb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CH4212400148.
In Nativitatem Domini Canticum, H. 416: Nuit (interlude Instrumental pour cordes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f8f87ff25521d883a37bc2489b08cb4cdac1ffbb00c0ae2b7b03eeb1f2d6f2. 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/CH4212400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6404c030bd478ba4fbaad964c95cc796d8e336e3b178ac4c2f8a51afdd01cd0a. 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/CH4212400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf828eb82959a07b169051a3b54f715c9ae3d939014d6ad462689cf90519e84b6. 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/CH4212400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e035675d724c50867150c6bd9ff049dab270d137f54e81159dc01a7b181464. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CH4212400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0838433115cbe722d99f08b844f8e17022677932b70174d0b45c8f2b198e3475. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CH4212400153.
Messe de Minuit, H. 9: IV. Offertoire "Laissez paître vos bêtes"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8f61a885fe1184a5d88895d2a88593d18bb04ebcbce2fac6715a926380e2fc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CH4212400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d5b3d9954927addd0054f4a05fe34d2507b88f61f3a98c797c202379adf17c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH4212400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b37bf1ba511b2c0f9f77c14bbf0d0893d2c415c4f6d539f898535a106fc5ab. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CH4212400156.