Il pomo d'oro (The Golden Apple) is an opera in a prologue and five acts by the Italian composer Antonio Cesti with a libretto by Francesco Sbarra (1611-1668). It was first performed before the imperi
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 0x077f8b1fd67b9f938e6fe023d58860e457cbab483273177e2b50a00341d8a313. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d6598a5-47f4-4788-ab61-7704d928965f.json and https://artists.proofprofile.net/proofs/artist/4d6598a5-47f4-4788-ab61-7704d928965f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Monteverdi: L'incoronazione di Poppea, Act 1: "E pur io torno qui" (Ottone)
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 0x6b9489cd33477d600b2213e17f40b3ca99281857cbf11abc7696cfcb538f3b45. 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/GBAYC2301485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd8949f37886c2bb401965ac9f7d2fdd0c8c631769a02880eabd3c77e356f32. 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/GBAYC2301486.
Caccini: Le nuove musiche: Amarilli, mia bella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fd2efb70073d7c55fa5e07547519f1a4e0de2e57e3cc9e676f8055acd81d69. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC2301488.
Frescobaldi: Arie musicali, Libro 1: No. 16, Aria di Passacaglia. "Così mi disprezzate?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31489d905567609b0bcbc019acc043e14b353416df43e9945a6669c26492d70. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBAYC2301489.
Strozzi: Cantate, ariette e duetti, Op. 2: L'amante consolato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3f8d6cbf4c9111567b72f045b6a6273dc82817b9ead3885237b6365d444174. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2301490.
Cavalli: Pompeo Magno, Act 2: "Incomprensibil nume" (Pompeo Magno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87195bf73262fe508889fbca291e44567f997844e601e653a609077158368a6a. 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/GBAYC2301491.
Kerll: Sonata for 2 Violins and Continuo in F Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1655ad1658d86485078e112419176a5f7036b3a65f2f0a022dba2d5ac838a68. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2301492.
Saracini: Le seconde musiche: No. 1, Udite, lagrimosi spirti d'Averno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1fc12ef7c6457f55618a8bec3376d2ab973641887d2428b773731deb021b3e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBAYC2301493.
Pallavicino: Demetrio, Sinfonia: I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08e0e00d80f5354a12b37b9d5371b1c4192c08c8b865d31f4da90348190c189. 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/GBAYC2301494.
Pallavicino: Demetrio, Sinfonia: II. Affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef2336ad64f1995f00bf5b3a59edb010b2e95f46d5898819b67d409c2837726. 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/GBAYC2301495.
Pallavicino: Demetrio, Sinfonia: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238a5e0060a09647bf84ea6de9301c177ddb42578a35539607029fb289b9c413. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/GBAYC2301496.
Pallavicino: Demetrio, Sinfonia: IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708b41d635a39604004f65b6713ca78c644b6747848d8564e067931a522ad5ce. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBAYC2301497.
Cappellini: Raccolta di Ariette: Chi vuol ch’il cor gioisca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f929368ccdc01f3e085af8ba3b034b1d195c0989322fb4e8c771c5adf878ee. 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/GBAYC2301498.
Netti: La Filli, Act 2: "Misero core" (Berillo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451c8e29ce3db388386448d185b32fe04141ea46435a5ff32995f717501b22d5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBAYC2301499.
Netti: La Filli, Act 2: "Datti pace, Berillo" - "Sì, sì, sì, scioglia sì" (Berillo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31957a7bc82cc0ce1f37a3e1cf84cd51b8fe850bac331e6eaf19a4918375b253. 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/GBAYC2301500.
Netti: La Filli, Act 2: "Dolcissime catene" (Berillo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dc5ebc40ec34731f4df030627605f798270d8bac5d2b9e01a0b50f6daac877. 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/GBAYC2301502.
Sartorio: Antonino e Pompeiano, Act 3: "La certezza di sua fede" (Pompeiano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19786ffe3b81d29cdc9b6f8cfe1d24a776560d428a0a83d4902c4147062ff41. 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/GBAYC2301503.
Netti: L'Adamiro, Act 1: "Quanto più la donna invecchia" (Crinalba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d03b49d36c6dcbe72a3dad26b97273c5fc84ef3032519499bb3c7752cc305b. 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/GBAYC2301504.
Marini: Scherzi e canzonette, Op. 5: La vecchia innamorata (Instrumental Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3789654de3b45a3a84d73b12271bb95a72c168371a810711d584cccf480a76. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2301505.