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 0x0fe125df67e18cd99ba6cf02787d863012d313f1932115bc7cd9c19b72ba3295. 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/0a768262-a6bd-4853-8da4-72725a7c4de2.json and https://artists.proofprofile.net/proofs/artist/0a768262-a6bd-4853-8da4-72725a7c4de2.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 0xe67958cb717b16dd0c38497f44f2b22ee12ef319d97745e1fb8557ac72cc9474. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ITC351900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fa8866d8d3b958c6186c687839625d3461d079bb39ceb50529d6ca076f8cfe. 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/ITC351800158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3316e0067e35116ddfa9485a5a971e3bf3dd2a217a73e1c29b128da14ad08a6. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ITC351900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fa22507bf6722834c60aea0894f2b671e1c777abf697cd052c2491ade1a6b4. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/ITC351900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeb22627f84d0468851e3d2816010aa78e3aebe93b56d00c752ff94743d7a06. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ITC351900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a5f3b34ca01237bfb876722514d14b692d56aa8ac685c48c943764913e86e9. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ITC351900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e457485164f6d1b05888e9c6633ac0e03373409bfab6ad3ee0992d5f6b33b0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ITC351900166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd621c968020341ab17c248053be937fcb172fac3508247de3fab46cdd01c4a79. 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/ITC351900168.
Medley: La notte / mi fa impazzire (Cover Version Remix)
Medley: Lei, furtivamente (Cover Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993ed86ace2a1df78384ed0bc435f53559c8c64f46705fe2f54545e7987227bf. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ITP542200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b95954dc54ea3fcf11d126fac8428121a821ba019e1f5ae9c8a1f814fbc5ca. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ITP542200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf79f72c8609cdd63f5242158a41139b55229cf7d39eaab6426dc76722ba205f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITP542200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4c5b94290cb2d71d3dfcc7e59ad3bd2bc585c4e760de173646246446c32ba4. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ITP542200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125e65031fee3a1291afc96f8e6aa7d26b112ce58f3d2652584cd1069d35270d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITP542200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab54c4be796a4c3dd2f10cd42a05a46c293a38019b3fe164b457ef7086f4136. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ITP542500002.