thumb|Sketch of Alberto Fortis in the Galleria dei letterati ed artisti più illustri delle provincie Austro - Venete che fiorirono nel secolo XVIII. Venezia, 1822, by Bartolommeo Gamba. Alberto Fortis
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 0x88fab766d638d2f038157ef4952c4005a35324e9159850b2ebce5a9b4fb99c8e. 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/0f63fb4d-dad3-410c-8bcf-7495d4826138.json and https://artists.proofprofile.net/proofs/artist/0f63fb4d-dad3-410c-8bcf-7495d4826138.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 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 0x47d5bed77525f8e7c53f6e5769afa1bc055a6e43f52c808b35d483d7d8f40e62. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/ITUM71900991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd578e97d947918f44a24812ac4c0b3f66ac0bb96521adb0795e018668c176578. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITH000350355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe8fb387f97806cda3be9303e93816207f1a61ce592870a40f1de70f17d2505. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ITH000350356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c37342f441153b0b2ffc9180c967928bf70b7dd6a48e50299df6cd83e9a1f04. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ITH000350435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5472e0d589811ce23823c6d2068cebd54898a66c7570e24b1a604f47e92606. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IT7009101430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfc7a4e0aa6c0e50272f8146eb40947e94ac3348b50670cf02431646b0234ee. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITA610808274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5472e0d589811ce23823c6d2068cebd54898a66c7570e24b1a604f47e92606. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/IT7009101430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215d342631f0c36a3cd53386f1db2500b31a1cc32d47fb2ae7f04a763e5b73ce. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IT7009101410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6af8e633878baa83f75695d2d285eb75db05a5b8b7efc3c04889f1cc0a2f786. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/IT7009101400.
Alberto Fortis 40th Anniversary Remastered Edition (Remastered 2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6198463895e1118c8180e8a83cb21b54ea2e8f00903d4c18e60ddbb08a9009a. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/ITUM71800959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fa15e860a659be07105564091c8304e294bdb402b0647cf4bdd9288d9b202e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITUM71800960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033b95bea251990f7a7bdf7132028311ecdac685b1c90ea8f94d974894e3e6b4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITUM71800961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941fa4c9ab5312e3eb6070cb90fd662731b3be0fb015fa8044e1ee329434e4bd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITUM71800965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6f03d7fac479950ae8bbe60475bfbbb21f0ba94ff60cff6d064b04a053483b. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/ITS041900707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd741df0c02f47f675f3d88e9120b5e6df74216f4a9ea8eb1cbdf62e46f055101. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITVPL2500009.