thumb|Francesco Molinari-Pradelli by Annemarie Heinrich Francesco Molinari-Pradelli (4 July 1911 – 8 August 1996) was a prominent Italian opera conductor. He studied piano and composition at Bologn
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 0x74f21cdc90a9a3c0c0c9a649e0dea07d4996042cc8c8042954c50f110dba8cb3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4974036-8289-4732-8a64-d9759d19f37f.json and https://artists.proofprofile.net/proofs/artist/c4974036-8289-4732-8a64-d9759d19f37f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ettore Bastianini: A Discographic Career (Recorded 1955-1962)
Il barbiere di Siviglia: Act I: Largo al factotum della citta
Orchestra del Maggio Musicale Fiorentino
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 0x852fe3ed80b5f28d7000ff1568b5d53084a2c6ad2aedab4ac28b63b2835922bf. 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/ITCC51101601.
Un ballo in maschera: Act I: Alla vita che t'arride
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158ea359d2ebbd04232ed4b64d0d60a4bda960847521651fddbfd0f844b435ac. 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/ITCC51101625.
Il barbiere di Siviglia: Act I: All'idea di quel metallo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5b04121742e078f559213743ba9a8ca3a501cf771d6eb242f7934ecb2c84b1. 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/ITCC51101602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe931513285086652057fcd890eb4fa82643b225ef62304b5a76f60b24acc9203. 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/ITCC51101612.
Rigoletto: Act II: Cortigiani, vil razza dannata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08df26b2590f427eff2e0218c8e1775f0dd0598aaa0f7c9292a81b3758338ad. 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/ITCC51101613.
Il trovatore: Act IV: Udiste? Come albeggi - Qual voce!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c4cfe42addcbd937508f70d680f1bd986edb0e490216744318b820c88d27bc. 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/ITCC51101619.
La traviata / Act 3: "Parigi, o cara, noi lasceremo"
Orchestra dell'Accademia Nazionale di Santa Cecilia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3869082d3d9d1c78e13a88ed02eedf8c146f2aafe12a04a846ab759a350c869a. 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/GBF075440909.
Fifty Years of Hungaroton (1951-2001) - Conductors
Simandy, Jozsef: Tenor Arias - Donizetti, G. / Wagner, R. / Erkel, F. / Verdi, G. / Tchaikovsky, P. / Mascagni, P.
Rigoletto / Act 1: "Gualtier Maldè...Caro nome"
Chorus of the Royal Opera House, Covent Garden
Orchestra of the Royal Opera House, Covent Garden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b70d8b157fcf141c8015b9bc1dffb56a169b779b540fe860ca124c60530362. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF076040216.
Best of Opera - Die 50 größten Opern-Arien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b70d8b157fcf141c8015b9bc1dffb56a169b779b540fe860ca124c60530362. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBF076040216.
Roméo et Juliette, CG 9 / Act 1: "Ah, je veux vivre"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7431260c142cd7a9a1ddd5e3233dbbcf0b3c9337b31f6f60e87ab12a96efc9e. 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/GBF076040209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554a28e935385e220a3a1219c90d427374e242234079ea640030da4a6c4b95ca. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBAYC8800934.
Puccini: Turandot, Act 1: "Non piangere, Liù! … Ah! per l'ultima volta!" (Calaf, Liù, Timur, Ping, Pong, Pang, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b908b6fa3f74f08899bf7e1dfba8228bf1538f749b5e05a26011f3b8856289. 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/GBAYC8805391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e49d9e776d7ca81bd5437f339b0e1af4b48683ef8f350470a18d70616e6b74. 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/GBF075510090.
La traviata: È' strano! - Ah fors'è e lui - Sempre libera
Singers of the Century: Joan Sutherland – The Art of Coloratura (Remastered 2016)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e904aecf4ec7b586dae3b8ece9226d371229c0f8efa70eec3481f5d4553d3b. 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/DEL111601192.
Puccini: Turandot, Act 3: "Nessun dorma" (Calaf, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554a28e935385e220a3a1219c90d427374e242234079ea640030da4a6c4b95ca. 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/GBAYC8800934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c468e934c07beb560b0b81eeaddc7520131e45db9bc60634bae92a72fd6ba4b. 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/GBF076040214.
L'elisir d'amore / Act 2: "Una furtiva lagrima"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e49d9e776d7ca81bd5437f339b0e1af4b48683ef8f350470a18d70616e6b74. 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/GBF075510090.
La forza del destino: Overture (Sinfonia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41827afb6524eb36c06423e7b191875b15c96a1f0b77c7bb48c3c448ff58da99. 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/GBF075540001.
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