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 0xf4a286c15b0e9bafff57324ba0108bff3fc85cd1c0c3ba0927191547610ccf5b. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9be6218b-b5cc-4bc0-9040-d687837bc61c.json and https://artists.proofprofile.net/proofs/artist/9be6218b-b5cc-4bc0-9040-d687837bc61c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Fulminante / Sinais / Falta Você - cover
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 0x3aac46808846ae76259a5179a485c410785db893e224d616341af4fcaa6a6a3f. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9K2411667 — a six-check JSON result.
Pirata e Tesouro / Vai e Chora / Cigana - cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2baf370580b1e4fbc52b5d019745cc6435a7daa2c2726989e36b25f3c277a0. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9K2411671 — a six-check JSON result.
Na Rua, na Chuva / Dependente / Brigas por Nada - cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534017662cfbc101980569561650aaacc5c16735ab94913f4d49d749def42330. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9K2411672 — a six-check JSON result.
Pagode do Mullatto ao Vivo em Niterói (Cover)
Erro Gostoso / Traição / Me Assume ou Me Esquece / A Carta - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c052d311fa2682db6a4b95d6f35c848b34040e0e7ccbd1fb94455bde9a5dce. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJW2561143 — a six-check JSON result.