thumb|Victor Alberto Sabata, 1950 Victor Alberto de Sabata (10 April 1892 – 11 December 1967) was an Italian conductor and composer. He is widely recognized as one of the most distinguished operatic
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 0x2d23ce843940b0680cea41aadf3eca618db7d83b2a7dee4b5dead946d3ea5f9e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67e77fb9-90b0-48f9-bb54-c31b03820190.json and https://artists.proofprofile.net/proofs/artist/67e77fb9-90b0-48f9-bb54-c31b03820190.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Puccini: Tosca, Act 1: "Ah! Finalmente!" (Angelotti, Sagrestano, Cavaradossi)
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 0x1b1567e941c658546c5404ec453c669a409c9956ee922ebd5a0e7254dfa73c34. 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/GBAYC1450086 — a six-check JSON result.
Puccini: Tosca, Act 1: "Dammi i colori... Recondita armonia" (Cavaradossi, Sagrestano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd240e14ac728251b0715f5e77ff1f5c0bb425c70a5b3eb5c938fbc087f39a7a. 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/GBAYC1450087 — a six-check JSON result.
Puccini: Tosca, Act 1: "Gente là dentro!" (Cavaradossi, Angelotti, Tosca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacf8cc14b965e74a96826f30724e699414bb63c9431db006495a6d35c82eaec. 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/GBAYC1450088 — a six-check JSON result.
Puccini: Tosca, Act 1: "Mario! Mario! Mario!" (Tosca, Cavaradossi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d2887ca6469034113db80bb7b5feb5db7e983b17ef5ec592e75b2636699f99. 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/GBAYC1450089 — a six-check JSON result.
Puccini: Tosca, Act 1: "Ah, quegli occhi" - "Quale occhio al mondo può star di paro" (Tosca, Cavaradossi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69370d9c9fb5fcce097a1a066938b198ffbfe7bf23129ef2c2bc27c0be993f88. 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/GBAYC1450090 — a six-check JSON result.
Puccini: Tosca, Act 1: "È buona la mia Tosca" (Cavaradossi, Angelotti)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d8458891e3264e7d9f20e05c327aac393d96dc6b25f463b89271525375565d. 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/GBAYC2301604 — a six-check JSON result.
Puccini: Tosca, Act 1: "Il cannon del castello!" (Cavaradossi, Angelotti, Sagrestano, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c738afab982e1408d68a0f4fa24d789cb5449850e37ad49093ffc2aae2bc97. 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/GBAYC2301605 — a six-check JSON result.
Puccini: Tosca, Act 1: "Un tal baccano in chiesa!" (Scarpia, Sagrestano, Spoletta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db305fbc5f7630e47aed0a7ac29390a2181e41343facb47ab1286669d2629c6. 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/GBAYC1450092 — a six-check JSON result.
Puccini: Tosca, Act 1: "Tutto è chiaro" - "Tosca? Che non mi veda" - "Mario! Mario!" (Scarpia, Tosca, Sagrestano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54315e1dfe57bcb1c999ad7337425c2e4fab237c1a7f336651b3b0ed6893d45d. 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/GBAYC1450093 — a six-check JSON result.
Puccini: Tosca, Act 1: "Ed io venivo a lui tutta dogliosa" (Tosca, Scarpia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cfe80425eb8cf0da6b8d19f794be856e4ae98e254c3e5dc72a6be2361a4886. 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/GBAYC1450094 — a six-check JSON result.
Puccini: Tosca, Act 1: "Tre sbirri, una carrozza" (Scarpia, Spoletta, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98034bab4fdf28fa1513d66ec8a94988156a4d6488a990a7d4eeed8b41673962. 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/GBAYC1450095 — a six-check JSON result.
Puccini: Tosca, Act 2: "Tosca è un buon falco!" (Scarpia, Sciarrone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b2823ecfa87560f185cea24bba71f0759804a31a9df1c91d697855523f37f9. 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/GBAYC1450096 — a six-check JSON result.
Puccini: Tosca, Act 2: "Ha più forte" (Scarpia, Sciarrone, Spoletta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1545ad29e0064eaa6079663fcaff31b6df33ba5a7e72c20816c35e3ab7675e4. 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/GBAYC1450097 — a six-check JSON result.
Puccini: Tosca, Act 2: "Meno male!" (Scarpia, Spoletta, Coro, Cavaradossi, Tosca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1a69d1a0114b6360cd2a9bc625e0821816496ad5961d27c0cd2a9a8c20c284. 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/GBAYC1450098 — a six-check JSON result.
Puccini: Tosca, Act 2: "Dov'è dunque Angelotti?" (Scarpia, Cavaradossi, Spoletta, Tosca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fd4f1b35d359b72fe50e7771b2e71b959b53a88b6c0b1e82f6dbe3023dcb0f. 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/GBAYC1450099 — a six-check JSON result.
Puccini: Tosca, Act 2: "Ed or fra noi parliam da buoni amici" - "Sciarrone, che dice il Cavalier?" (Scarpia, Tosca, Sciarrone, Cavaradossi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f157ff86033072f03267c42a3375d99bc30cc8942ec753eede9fca8b30678c1. 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/GBAYC1450100 — a six-check JSON result.
Puccini: Tosca, Act 2: "Orsù, Tosca, parlate" (Scarpia, Tosca, Cavaradossi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3299afe2985ae478aef9b461e90622e30d881df9b7ddc7a4ba0ec1e443994e0f. 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/GBAYC1450101 — a six-check JSON result.
Puccini: Tosca, Act 2: "Nel pozzo... nel giardino" (Scarpia, Sciarrone, Tosca, Cavaradossi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d9d242f2a390a138d40642b1f81530fdd4e422cf40221fd53e9afa412f4314. 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/GBAYC1450102 — a six-check JSON result.
Puccini: Tosca, Act 2: "Se la giurata fede debbo tradir" (Scarpia, Tosca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63820ca67c5b1ef357d6f246f5bfcaef10f8cffdaff188df2002d0e16942d32. 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/GBAYC1450103 — a six-check JSON result.
Puccini: Tosca, Act 2: "Vissi d'arte" (Tosca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36551cec3f4595a505f31461213b0f0e212de0b0ab81a4c55613644faf8444cb. 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/GBAYC1450104 — a six-check JSON result.