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 0xad08eeca31ec6f9d15457230f1fe97feb4dbdcf2b77dc68d49abc7ee58e4ddaf. 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/c5fe3908-9043-45ed-9532-dfd44529db51.json and https://artists.proofprofile.net/proofs/artist/c5fe3908-9043-45ed-9532-dfd44529db51.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x11a2dec46d025581b6cc30d9b26b063ea32103a86dcac1448daa21a8ddc0ab93. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5G12500003 — a six-check JSON result.
Mineirinho / Cheia de Manias / Vergonha na Cara - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa270decd0bf638be4a19ee45fdddad360efc166bed319bfc9dd39cb85948645. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2537933 — a six-check JSON result.
Barquinho / Tô de Buzão / Vuco Vuco - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d71c996262d0ca4769299b0ef1b363a0dee54aa08a447b4fb9a95ebaec2f77. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2537934 — a six-check JSON result.
Convite de Casamento / Ela É Demais / Sou Eu - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb9b87c1b3908457c61be8ef049a7be901d3670c60ea759e2a4027f0402b21d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2537935 — a six-check JSON result.
Pra Que Rumo Que Nóis Vai / A Melhor do Brasil / Só Que Não - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f49235502760129eab6a569c077a926c5f67c5b57cb50766d7281fe88158a65. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2537936 — a six-check JSON result.
De Chão Batido / Sonhando Na Vanera / Morenaça
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5c0fa41601454bd36aa97712278c180cf987bd9d70c08d406299d0a5d39c23. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2546118 — a six-check JSON result.
Meu Medo / De Um Canto Saudade / Anunciação
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dce63a3f8b71eb7e69873077968f90458d5a3cde13292285a45a092134467d4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2546119 — a six-check JSON result.
Churrasco e Vanera (Ao Vivo em Santa Catarina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f7cfbd8d392246321c7d01a44072e8321b27ef52e6142a2f54cb6cddd9e6a0. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2477238 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f308afbcc90fb5b3f6a0b542d8e75767e27b86599af8b3fbda9d2588f7c2229. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX3662400016 — a six-check JSON result.
Tranco Véio Fandangueiro / Floreando a Cordeona / Cancha Reta / De Bota Nova
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46718fd82afec1cf4b9faaab8d39b3578140d5555d448fb758e72635b8994a73. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2546120 — a six-check JSON result.
Mãe Campeira / A Primeira Vez / Louco Por Chamamé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe41ffe4c62435763ae2858967c5b0f2dcd81ff4c743f8be277ed10356bcf4b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2546121 — a six-check JSON result.
O Rio Grande Me Criou / Saracoteando / Procurando Cambicho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdc772967473f745fdbdccddaac68afa2a68a0e2d3da4862dbf5bb2d47f4850. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2546122 — a six-check JSON result.