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 0xc82e2237ad5aae189b12ff5162459457cc2800c6675b9f0c5751a7eb11f343d4. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70411080-f85a-4728-8266-092cde31d59e.json and https://artists.proofprofile.net/proofs/artist/70411080-f85a-4728-8266-092cde31d59e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Le bourgeois gentilhomme, LWV 43, Act IV Scene 5: Dice mi Turque (Le Mufti, les Turcs)
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 0xb0464a01ec66cf2647c2f78a5f810b090263e6ba9c3007e150a43354036dc209. 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/FR9W12137024 — a six-check JSON result.
Le bourgeois gentilhomme, LWV 43, Act IV Scene 5: Mahametta per Giourdina (Le Mufti, les Turcs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43b6714d4ad14b9a996274e57025319df4f157f5843ef77c34b2acb5e4c050. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR9W12137025 — a six-check JSON result.
Le bourgeois gentilhomme, LWV 43, Act IV Scene 5: Ti non star furba (Le Mufti, les Turcs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce47b9350b13ed217cfd69ac71452db140819a3aac0deeee75c9dd61b91459bd. 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/FR9W12137027 — a six-check JSON result.
Le bourgeois gentilhomme, LWV 43, Act IV Scene 5: Ti star nobilé é non star fabbola (Le Mufti, les Turcs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15660dd03fd6302c34df0ade7267f516d3b456587b0f8777e25db3385fe17bc2. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FR9W12137028 — a six-check JSON result.
Le bourgeois gentilhomme, LWV 43, Act IV Scene 5: Non tener honta (Le Mufti, les Turcs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb9b9513b02feae4ff67b05ba70e1048a14c853646539ecf9b45151d5f910f2. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FR9W12137029 — a six-check JSON result.
Le bourgeois gentilhomme, LWV 43, Act V Final scene: Le Ballet des Nations. Première Entrée – Le Donneur de Livres.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9cfd8f32beefa65b5b3c64a869ceb45d605642cf6b0275800e165320dc662c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR9W12137030 — a six-check JSON result.
Le bourgeois gentilhomme, LWV 43, Act V Final scene: Le Ballet des Nations. Monsieur, distinguez-nous parmy les Gens qui crient
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc38c52bf8e5b5858dd9d06379d7d2e3d5545dd06a23cd618d5dc4e742a4a6ce. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR9W12137031 — a six-check JSON result.
Le bourgeois gentilhomme, LWV 43, Act V Final scene: Le Ballet des Nations. Bel tempo che vola (Le Musicien italien, la Musicienne italienne)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6928ce9d5d1dbcabd2c49731b7311d76d051034d23b60c7c61179634ad30760. 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/FR9W12137102 — a six-check JSON result.
Le bourgeois gentilhomme, LWV 43, Act V Final scene: Le Ballet des Nations. Sixième Entrée – Les trois Nations. Quels Spectacles charmants, quels plaisirs goûtons-nous
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62413d26cad8376a2122130230100ea0b47912cef48557ad14aa392b01625e7. 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/FR9W12137106 — a six-check JSON result.