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 0x14c097785a0104a8ce2cd05211662094cc846e9b1fb80b240a526c6cda8d1dad. 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/6d06084d-57fd-4d9e-8a00-51f9d68e8666.json and https://artists.proofprofile.net/proofs/artist/6d06084d-57fd-4d9e-8a00-51f9d68e8666.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tem Nego Bebo Aí / Sacarrolha / Turma do Funil / Cachaça
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 0x73c279faa3f29a2db8c78305e5a7c62654c9e794c9f279ff3006e3482714433d. 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/BRPUI0600507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37f36d3d3f98a97646fb359079bf981db82bb3e6f92bd58e580a98fbd006681. 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/BRPUI0600488.
A Casta Suzana / Menina Internacional / Maria Escandalosa / Marcha do Sapinho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8ebb4580a6d091cf5c4c5f0ec947f35aa5c124ddb7f2942359d37d241c0310. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRPUI0600489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d96c6f24f3f2779e3fa0f96414d41208030f685c9a53abe1526df539657dd17. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRPUI0600490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07de954cd39b82c17b357353b464dd428faa650158136ca674e82272ccadc1a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRPUI0600491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5dce61ed180c4190dc92ca44acc22da4778e99399fcdf85f79497b3cfd6e9c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRPUI0600492.
Coitadinho do Papai / Roberta / Joga a Cave Meu Amor / Rolo de Pastel / Zé Corneteiro / Cadê Zazá Aurora
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57cdb82daf93f39a2bebb7a3827ffb8f009870918709ec1053afbd22594e915. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRPUI0600493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7e8a30b335997fbe5625055306c32e92f95e0eccfc8d4ab58a87fce4895d65. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRPUI0600494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3776fb9fb9bcd226634a090cccaf7299e1a66fb0c6b8453739c1555fff75901c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRPUI0600495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c07151536589743c0f9dba2598b3bea49ad2d452c5880f27e90a952691631d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRPUI0600496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b2b905abccbb71c72adf7343a4492f17d50a6b590ef39d8d8702c3396f1ce5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRPUI0600497.
A Mulher do Padeiro / A Mulher do Leiteiro / O Apanhador de Papel / Pedreiro Waldemar / Cantores do Rádio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81afb38cfaffae4406f785a731e784fd3717abd96e1f230e70644e222f8d2d59. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRPUI0600498.
Barnabé / Maria Candelária / Eu Tambem Quero Roubar (Só a Primeira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5a5b69f2ff6860947273569fba68f963e2d61f13b80a309e355cbcf5373e40. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRPUI0600499.
Cidade Mulher / O Que É Que Há / Vai Com Jeito / Jacarepaguá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfade080eb10261e83f6b47f9640664007d63d353b2906b9659b0d9e5dc79ba67. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRPUI0600500.
Primavera No Rio / Allah-La-O / Tomara Que Chova / Pediram Pra Chover (Marambá)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaf58b00ffc23cbc119624d8efd7b6d287213f23e27e56bdd282d2fe0cd62a9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRPUI0600501.
A Lua É Dos Namorados / A Lua É Camarada / Pastorinhas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320b7119b8d9b80c606140f714636f1d80adc13a77d67bc5d45b2ef5be38eb3a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRPUI0600502.
Daqui Não Saio / Marcha do Caracol / Seu Condutor / Oito Em Pé / Corre, Corre, Lambretinha / Uma Andorinha Não Faz Verão / Vagalume
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a643b5cd3861e0ef0e442c2b013b655022c4bb0bf89f40a7cc4c5cd1678e1d5. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/BRPUI0600503.
História do Brasil / A Menina Presidência / Se Eu Fosse Getúlio / Retrato do Velho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380bbbf1ee97de074daa99c00eba14247bb1a82925eac7fef31dcfe637c52eaa. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRPUI0600504.
Quem É o Tal / Espera Maria / Salve a Mulher / Calma No Brasil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613b270eafa92bdc8b659641acb459efb44090c4e5beaaabb00bffb5b8dfbe31. 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/BRPUI0600505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31676269e152f21b2de95e1c2f9ff07ee7219cb79cc1b0bf082674d89335e22. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRPUI0600506.