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 0xe83ee23a45a4719bc082e92045115e7f55b288fcb105d5375e5d1d100b70d64d. Chain 2 (Bitcoin): anchored in block 953889 (2026-06-16T04:57:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0eb02096-0896-4a60-a1b4-f5b652015c33.json and https://artists.proofprofile.net/proofs/artist/0eb02096-0896-4a60-a1b4-f5b652015c33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Otello, ossia Il moro di Venezia: Act I: Sinfonia
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 0x77fff662298d800f55bb7fff8bbb0cc3d49b0f89e7ca4fc239552cfbccd3b368. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKI190968501.
Otello, ossia Il moro di Venezia: Act I: Viva Otello (Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b112e1f22d81be5d27d72f3e2134173015e91486234d56d920699f6186c47c2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKI190968502.
Otello, ossia Il moro di Venezia: Act I: Cavatina: Ah si, per voi gia sento (Otello, Jago, Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e0dcb6107b4925b1fbb3989f83b35456504cdf3173c3e27c9c11cfef19e49d. 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/HKI190968504.
Otello, ossia Il moro di Venezia: Act I: Duet: No, non temer, serena (Jago, Rodrigo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf9f274cdd657fd981f7589c0ae08efbd2efee3e5db3dbc3fb3d3fb4fb0706a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190968506.
Otello, ossia Il moro di Venezia: Act I: Duet: Vorrei, che il tuo pensiero (Desdemona, Emilia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e6089a978dd8439b434b0abefc9b9b1f1b056a3212c012b5c44394d8b93d22. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190968508.