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 0x7883351ca8f802aa53256fd87a8f0ffa5b25841f4ac518bcb276bad7cb9a848e. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f52e07a8-791f-4476-b2c0-24ba90a70c8e.json and https://artists.proofprofile.net/proofs/artist/f52e07a8-791f-4476-b2c0-24ba90a70c8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Martinia Franca Festival - 30th Anniversary
Verdi: Trouvere (Le) (Il Trovatore) (1857 Paris Version)
Verdi: Macbeth (Original Version, Florence 1847)
Rossini / Niedermeyer: Robert Bruce (French Pasticcio of La Donna Del Lago)
Verdi: Don Carlos (Sung in French) [Wiener Staatsoper Live]
Don Carlos (Sung in French), Act II: Act II, Scene 2: Sous ces bois au feuillage immense (Chorus, Thibault, Eboli)
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 0x063204413ab77c75d75052abecee8efa0d15ba34457aa0166c17417944e36592. 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/DEB950564809.
Don Carlos (Sung in French), Act I: Act I: Fountainebleu! Foresta immensa (Carlos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1da5bb76c232220a7881d9efa456e72f0bbcb3295c00a117c9442464b884f61. 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/DEB950564802.
Don Carlos (Sung in French), Act I: Act I: Le bruit de cor s'éteint - De quels transports poignants et doux (Carlos, Thibault, Elisabeth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e1394d7470c59e38f5265c87f6106fadda7209802e4faf820c48486792d530. 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/DEB950564803.
Don Carlos (Sung in French), Act V: Act V: C'est elle - Au revoir dans un monde où la vie est meilleure (Carlos, Elisabeth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa795714ce4800f77c69b4cff1865e559b8bc3fdb6f1b2d637eefc45f32f70272. 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/DEB950664840.
Don Carlos (Sung in French), Act I: Act I: L'hiver est long! (Chorus, Bucheron, Elisabeth)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03343e836fef80398f60fd3f42d7c9b4e85fee0453369ddaf4697786f290b877. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEB950564801.
Don Carlos (Sung in French), Act II: Act II, Scene 1: Le voilà! C'est l'Infant! (Rodrigue, Carlos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8761099d3c0a0b729a621789af7e984764c1d32eccd15f140ad7f6fcbed356a2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEB950564807.
Don Carlos (Sung in French), Act V: Act V: Oui, pour toujours! - Ah sois maudit! Artisan d'une oeuvre détestée Carlos, Chorus, Moine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf886f18d366ccae12d1600d5ace9e05652faec31a9cad8c87845bf774be1f658. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB950664841.