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 0x6582038cbcf9fb47f50360cf766f6cc8e9d786ae13e8835c7353a7a6c6cffb25. 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/23da1ab7-a61b-49df-8867-537b5c77073e.json and https://artists.proofprofile.net/proofs/artist/23da1ab7-a61b-49df-8867-537b5c77073e.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 0x51bb71110c5e3ac1c4df7871bc22acfa5650c1870427d11b85e0a1b11caf1527. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRBLD1600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf335adb5663b174d069bc99fe2b3e0618ae4bd28613dfa0ecc5a35c5204b801. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/BRBLD1600057.
Pot-Pourri Palma da Mão: Pé de Anjo / A Flor e o Samba / Miudinho, Bem Miudinho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bf9fb8dd1ca1c55cd5d350d5327077f0465009371700eaca8fd7253d93a1e6. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/BR3081900004.
Pot-Pourri: Nosso Bem Maior / Só Felicidade/ Nosso Grito/ Elas Estão no Controle/ Tem Que Provar Que Merece
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61474e57f0ca506e56629227d695328f14a026ffe1fd9c7ce1f95e5bc97f3abd. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/BR3081900006.
Pot-Pourri Muito Samba e Pouco Papo: Eu Canto Samba / Menina da Colina / Olha o Samba Sinhá / É Preciso Muito Amor / Saco Cheio / A Vaca / Caxambú / Cabaré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1950ad0e2c6212076d9bc8521788cc94f00eb71267071da973bd5a0de170182. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BR3081900010.
Coisa de Partideiro / Jogo de Caipira / Facho de Esperança / Negra / Batucada dos Nossos Tantans - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0786e3a3dd66c83db6e730256c0a5528be98798c02d9c0605706c15cf7df4235. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/BR3082000001.
Conselho Amigo / Vida da Minha Vida / Opção - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c89a775603d930d5a98f7b653e0f1646026999051df654a327f62e700bcd7e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BR3082000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480a84558650cf5f52fda5db5a6dd133101e53647000e05063cb1edb79c3bb3b. 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/BR3082000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc7fc2fb39765aa6d7d72e81d4958c8247d84f8124b373d271df5a31c035301. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/BR3082000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cfd706f87b8a4d776a999dc4d7752a02e33067ed6a0a93f580f26d9f998350. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/BR3082000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449495227965a7528122a589e090ec78ff71634a2b8da975ce1cdf63d3469a54. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BR3082000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67502f61b3677d4d19f1ea4a1bf1b9eb117b7a6790c1466bbafb3b1b0c460a4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BR3082000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7285ac315b98bda2c66f22d43461cf2d588d5d6c703b4e4c5ee9734d906e72. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BR3082000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8a22bd2754c3c529f52fde11b4cd3f8fb933b1c2ab3d9ec13c6a7e4e06bfc0. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/BR3082300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a774de421c7d016ad2163419e34a79c037280d9c5eaf2144821d10b30988ed. 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/BRUM71904485.