thumb|280px|Gianluigi Gelmetti, upon receiving the medal of Knight of Grand-Cross of the Order of Merit of the Italian Republic from President Giorgio Napolitano on 12 November 2008. Gianluigi Gelmett
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 0x12c58ce3a206985da68cde42f4c44e668cff99e5ec83a04891218056fd67cc0d. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/312c959f-ba2b-44ca-9243-ebf2a7e3a715.json and https://artists.proofprofile.net/proofs/artist/312c959f-ba2b-44ca-9243-ebf2a7e3a715.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Orchestra del Teatro Comunale di Bologna
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 0xbaad2e196d523c631530d5749852168db59f993fcaf31b0310c9d6d48af421e0. 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/DEC629000434 — a six-check JSON result.
Un ballo in maschera*: Act I: Ogni cura si doni al diletto (Riccardo, Renato, Oscar, Chorus, Samuel, Tom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c221841b4b64755401645791160e34444ed3134e3895ccd6400efd64eb95609. 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/DESB31328109 — a six-check JSON result.
Mozart: Sinfonia concertante for Violin and Viola, K. 364 & Symphony No. 40, K. 550
Mozart: Sinfonia concertante in E-Flat Major, K. 364: I. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fac361a3f81c2fc713f4fa14fc2f4a47bd95498c7c5ae39adb390564f1aadc. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GB01A2100180 — a six-check JSON result.
Mozart: Sinfonia concertante in E-Flat Major, K. 364: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a207c8a19fc64f3ba80a242c73400310e61db52e03368ea143f37a0ee368b4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GB01A2100181 — a six-check JSON result.
Rossini: Il barbiere di Siviglia, Act 1: "La ran la le ra ... Largo al factotum della città" (Figaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae14eea26dd255da478d0aa7a28ca67ca0c2c63e2e4988854a6be2a4e8e216c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9200973 — a six-check JSON result.
Ravel: Piano Concerto in G Major, M. 83: II. Adagio assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7be5cdd88c89dc3f2409906c01436524252feb79c086229929bde8242fe83d4. 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/DEC629000947 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fe9550aacd6e0f75e9c5a997f24963d0279cbca5a17dc2a19e4228db0480b0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBAYC9102910 — a six-check JSON result.
Waterloo: Andante eroico - Tempo di Valzer -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0fa604cbe6d8c937966cd72d4a034a44bc27f0334f44b9677e7a283f779a7f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9102927 — a six-check JSON result.
Waterloo: Andante alla marcia - Mosso, non troppo -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3b79bd99406c8cb6f82e0b2dda89f39ba29314bd67b02761b5fff482b6e1b5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9102928 — a six-check JSON result.
Waterloo: Andante con moto - Alla marcia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8af18de3c63d245ec5708effa6097d1333a13a9106781fd2e96e4c37a2691e9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9102929 — a six-check JSON result.
Berg & Stravinsky: Violin Concertos - Ravel: Tzigane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59d7feab1c83b456fd8576183d073acf3c633dbc30e92be650c1d0e52e03b55. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD019901268 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c886615e96f19fcfcd3bc0b72848fb12f69a452cbff212837b24fb846a55b1c. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ITD019901249 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2f728b376cab09ada649c8ff56966e9f03bb8811cf7c681923e88aa84e7c01. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBDCR2100326 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb482709abfc979757c5a197565993f51723da4eed4b0959f191e0358804ce5. 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/GBDCR2100535 — a six-check JSON result.
Chitarra Antica E A Mo' Di Liuto/Chitarra Oggi
Mozart: Symphony No. 40 in G Minor, K. 550
Italian Operatic Overtures, Vol. 1: The 18th Century
Il Barbiere di Siviglia, Act I: La ran le lerea ... Largo al factotum (Figaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae14eea26dd255da478d0aa7a28ca67ca0c2c63e2e4988854a6be2a4e8e216c. 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/GBAYC9200973 — a six-check JSON result.
The Barber of Seville, Act I: Cavatina, La ran le lerea ... Largo al factotum (Figaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae14eea26dd255da478d0aa7a28ca67ca0c2c63e2e4988854a6be2a4e8e216c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9200973 — a six-check JSON result.