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 0xa2c01c53ea0eb715c9a36f1cd92262ba8c5d0158d4ecc8e3c7fd456d145bb899. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f53bf229-0998-45bd-9f87-2457428a7e1b.json and https://artists.proofprofile.net/proofs/artist/f53bf229-0998-45bd-9f87-2457428a7e1b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Manon Lescaut, SC 64, Act I: Discendono, vediam! - Live
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 0x4727c114845c6b2169abaeda307cece23ae8ff4cfa62f3b1e898c6fb298680bb. 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/DEN961630905 — a six-check JSON result.
Manon Lescaut, SC 64, Act I: La tua ventura ci rassicura - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd239be98f9d99ebcd793b79aa6958dcd7b0a16b76bbb55703a0e14ca3f3b5b0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEN961630908 — a six-check JSON result.
Manon Lescaut, SC 64, Act I: Non c'è più vino? - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccf5291fa73e522bd0ff4ac0caaf33f9366929746138c86019d19b815a45b35. 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/DEN961630911 — a six-check JSON result.
Manon Lescaut, SC 64, Act I: Cavalli pronti avete? - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59631dec616bb38ba275acf1dba34cee4eb5359cb503cef22062529bd29ef96e. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961630912 — a six-check JSON result.
Manon Lescaut, SC 64, Act II: Vi prego, signorina. Minuetto - L'ora, O Tirsi, è Vi Signori, Abati - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9d201edd87e680b75a503b5d4a4128ad64d4600366b46e021dff03f4fbab9c. 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/DEN961630918 — a six-check JSON result.
El gato montés - Rev. Miguel Roa / Act 1: Lo mesmito q'er queré
Coro Titular del Teatro Lírico Nacional LA ZARZUELA
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f882c522105b27fe06037ad6c177f44574df5215e0c0add8b51edfc0815513. 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/DEF059130501 — a six-check JSON result.
El gato montés - Rev. Miguel Roa / Act 2: Senó, q'e no me farte er való
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877315b70d3c8ee166330126364a6e863b87ca096d0ed5663b38dcdfef54b3a5. 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/DEF059130514 — a six-check JSON result.
Puccini: Gianni Schicchi: "Povero, Buoso!" (Zita, Simone, Rinuccio, La Ciesca, Marco, Nella, Gherardo, Betto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eff969d601808f159d2c4d47b8ac910d80325edcdf6b7bd64ffa392a769d23c. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/GBAYC9702817 — a six-check JSON result.
Puccini: Gianni Schicchi: "O Simone?" (Gherardo, La Ciesca, Zita, Marco, Simone, Nella, Rinuccio, Betto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1fe5b07576d28a96b272ed675a9a91a4a5bc651c0073b9956579fbb4549723. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAYC9702818 — a six-check JSON result.
Puccini: Gianni Schicchi: "Dunque era vero!" (Simone, La Ciesca, Marco, Betto, Nella, Zita, Rinuccio, Gherardo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa728cffd81789eb7c3330ba26ac102016ff7bc7adb990fae0770bd978d1366a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBAYC9702820 — a six-check JSON result.
Puccini: Gianni Schicchi: "C'è una persona sola che ci può consigliare" (Rinuccio, Zita, Gherardino, La Ciesca, Nella, Gherardo, Marco, Simone, Betto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fe975f0f33d2075c10a6dd41d8b8b7d20a6ca0d2abe0a4de833a78b1a86158. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBAYC9702821 — a six-check JSON result.
Puccini: Gianni Schicchi: "Quale aspetto sgomento e desolato!" (Schicchi, Rinuccio, Lauretta, Gherardo, Zita, La Ciesca, Nella, Simone, Marco, Betto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd00758c31728accfb3bec029bc74a5ff5271c8983d4c25dedbd4940ab81a9e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBAYC9702824 — a six-check JSON result.