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 0x391c14d98cc1c0509e45b3b8b1e531ebf92930b5294b10736c7b4933d646fdf8. 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/6710dd21-78d8-4ed8-bdfe-fe25f9ac9575.json and https://artists.proofprofile.net/proofs/artist/6710dd21-78d8-4ed8-bdfe-fe25f9ac9575.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ivan Sacerdote e Felipe Guedes - Festival de Jazz do Capão 2021
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 0x542c1e4f69217e5127585d611a4cc256c13ca0aecc65fc2f3ff7e8189898a6bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BR3UN1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5e1063755eb845753668c43502bba99175ebfd827b1bff781338ec93e3a50c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BR3UN1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1114d47e4e34050db7828a6f6b6f8740b8c3cd9ce3bde9c540cc2692772115d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BR3UN1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99370dec0c478de2256af230e7fa7362757ce5f1e66319db47e2a78b16db4317. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BR3UN1900017.
Você Não Gosta De Mim - Ao Vivo Em Nova York / 2019
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ce2846a1a4ccd2c12222d18cae08bfa932f073dbdb6f7b333740b8fb36718a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BR3UN1900005.
Minha Voz, Minha Vida - Ao Vivo Em Nova York / 2019
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1f1e339b5728d5617e2ab118821f55cbe36388974ce41781a4ffaf381c4c19. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BR3UN1900002.
Onde O Rio É Mais Baiano - Ao Vivo Em Nova York / 2019
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8839772144668f616fc0e6ab454bfc2de661f51f8eba5be7392baf0dbc46caed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BR3UN1900007.
Desde Que O Samba É Samba - Ao Vivo Em Nova York / 2019
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a98a48ad4db4dba9b0783a4bad51cd8cd71fa1b0ac7fc4ee9150ec46bce031. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BR3UN1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a583a78d09f35bd1b7a2803033a3a37de5d360c0f2b01a18e5ae92a0961742. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BR3UN1900006.