Matteo Manuguerra (5 October 1924 – 23 July 1998) was a Tunisian-born French baritone, one of the leading Verdi baritones of the 1970s. Manuguerra was born in Tunis, Tunisia, to Italian parents, who
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 0xae93b38d7c00de9c4df53a1ec93c21f8b21f6c41b135e5ef94785db2d56c3886. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/556da913-2bc1-4e1a-b1b2-ed340243584c.json and https://artists.proofprofile.net/proofs/artist/556da913-2bc1-4e1a-b1b2-ed340243584c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563815d0499921b867c96d4e19c847adaa1d0eba7a4533480165a18ec2b62b3b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBF077930101.
La traviata / Act 2: Alfredo! Voi!...Or tutti a me...Ogni suo aver
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1841a43103cfc7a8843241939b78231d91a67aeacb07d01c63153b34a677ba. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBF077930117.
La traviata / Act 1: Dell'invito trascorsa è già l'ora
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8abb48f53250ee3f46599a1903e7afec7d9f635f8e725248913c99a5ae8b995. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBF077930102.
La traviata / Act 1: Libiamo ne'lieti calici
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772b3d633787c096b1a297238657463038dab46aa96e8df0cf6101f7306d7964. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBF077930103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a5adcb81c23e7cd03085bc9123d01302848cb0c58d6610e530e87fe008af43. 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/GBF077930104.
La traviata / Act 1: Un dì felice, eterea...Si ridesta in ciel l'aurora
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225f7f1148437cd851e00ae3d086e0b7bf673e0514ca3d0f0773fd9d9c9149e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBF077930105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddce82b688af8d89e8de170c1a5ed432353ac3e3bb9f5833c0f485887105a0aa. 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/GBF077930121.
La traviata / Act 1: E strano! - Ah, fors'è lui
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d05ddd51f2106ebfb9802db2828a32c92212b51cb6589a4d44f84435e780ac3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077930106.
La traviata / Act 1: Follie! Delirio vano è questo! - Sempre libera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefee10d8213d091220b72ba42f73061707def261bc6c60adb923ec6ba2aa208f. 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/GBF077930107.
La traviata / Act 3: Parigi, o cara...Ah! Gran Dio!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c1ffcdc607e259a98bd6918196a408cd8ab26d73a8f64c7eeeffed050b3326. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBF077930123.
La traviata / Act 2: De' miei bollenti spiriti...Annina, donde vieni?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0b4ca7763d75046332e3e8c1a039f35ea4d49e52b237a8788b3d345efa1be5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBF077930109.
La traviata / Act 2: O mio rimorso!...Alfredo?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3042d39a2c82aae494d7d5cbbda4ea9cef144f58c70b01ee29ff27abcc5a02d. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GBF077930110.
La traviata / Act 2: Dammi tu forza, o ciel!...Ah, vive sol quel core
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c708b5aaba0ee65eadd3a56cb1c4a270ab61f07b934d5e6ed03db5eaf14b62. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:41:41Z), 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/GBF077930113.
La traviata / Act 2: Di Provenza il mar...Né risponde d'un padre...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae96559bc9a77b9ba8a17beb9b6d7b42c8e11a93624e3e8aca5524960db7be8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:51:41Z), 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/GBF077930114.
La traviata / Act 2: Di sprezzo degno...Alfredo, Alfredo, di questo core
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2bd2d05b5b0fda19c5bbf7febdc4a8a772f809a0d58e2b86982aa9276ab52d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBF077930118.
La traviata / Act 3: Ah, Violetta!...Se una pudica vergine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e998b33db0950ecb7e91d317ca5ba87a7da73eacb2e330f4df788c74f3d0922. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBF077930124.
La traviata / Act 2: Pura, siccome un angelo...Un dì, quando le veneri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7f5237da71bad1fe4617841cb50df4489f63cc47a5e6ec0c398a691823ccbb. 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/GBF077930111.
La traviata / Act 2: Dite alla giovine...Non amarlo ditegli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd130284092ea8a60187b8490569d0422d8a1dd8e559794dfca74e0074c738b02. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBF077930112.
La traviata / Act 2: No, non udrai rimproveri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde601b5792fc63bbc62f079e1e2465eb47c4d8fd086af86bf3c7bf15a4245cad. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077930115.