Visconti is a surname which may refer to: Italian noble families Visconti of Milan, ruled Milan from 1277 to 1447 Visconti di Modrone, collateral branch of the Visconti of Milan Visconti of Pisa
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bf5fce73dd9986a3637cc92daddcb5b8c2b60968ad40277626a37ecffcb2a2. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/045c75ea-c9b4-47b4-81f1-551ceda9299c.json and https://artists.proofprofile.net/proofs/artist/045c75ea-c9b4-47b4-81f1-551ceda9299c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f05c3a33a259fdaa38d550828fcd001d456cbee9a3716a6b338c043dab7cd5. 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/ITYBK2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf834e815ceea25efc8859b66e470395d0706c1d0a72bd53932a1d84458a4e7c5. 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/ITYBK2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2a0c38f2997dd960da3bdc9acc268b291833664b67e41acdde2f53bc21d605. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITYBK2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02088fab73c67db4b7be553064fe7447ace2867d72a69e571712130ac08824f0. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ITYBK2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b514a95eb89cf20ff7785c2fe8c1d374411878b2ec8baa94c69d51280c6fba6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ITYBK2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f61c2b3639d41d01bcd5af568e83aaa71748a557ea5a1136f24350b97498888. 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/ITYBK1900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faa52bfc1d59efde53bfd3bb2f8968f96a0597c618ed5c8e0c684262564d2ae. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ITYBK2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefab4e643099f88d67804347c4ba029dfd73982c15776bf23258c5acd6975add. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITYBK2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034459977e6ccc774f34b3fbd451f95ac2fa30b295f43c1639fca586dfc3e79e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITYBK2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1e9e3678b6c0f5dbda81796fbce0f5dddc20aa323780758abea2e2f98a5ee5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITYBK2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfba709610f592457a786ca924edb63d9d7177dfd674670818b1c8f297074c5. 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/QZHNC2371121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4510184ad99c6ead5bdd6fb27e9063ec8cc85e9718672c42b5f66e49374bb0a6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNC2371126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5d4db5c20d27a3adb939bdaa45675a3b699ede73a0ae7eb3737a8fcca3d05a. 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/ITHBZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cdea38832f498d8ab9cf6b17c2ab78c755d702ffa243ee8d32d74a23846801. 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/ITUM72301259.