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 0x74fcaaeea16a3ef1046ff64d680812beb8d99968837bbcae387523c00b2a51f2. 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/7f2bae9c-c35c-40df-9421-f6a7765c6ac6.json and https://artists.proofprofile.net/proofs/artist/7f2bae9c-c35c-40df-9421-f6a7765c6ac6.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 0xe299f69e5ac68458ef3366a02424c92f4f2e41d84adbeb70c61d30741da49d3e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZTVM2246890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c4be6d1fe10504a5ba9f5507e1b0d2c1e40c98380f3b3d6799d93d9e02b7e4. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZW9M2216538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06365dafcb7a0d406153b56ccde7d5840b52d5328177353a1a2fe2bd7b9ec434. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNJV2379064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3f082cdea87c3f95c875367d3e2c01a2ec7ec9cb7c7a7c62dd0c88dee35e62. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNJX2377864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e20f310c0c5b412254a72de200522b5e038f8cc5a530bd2e3287c799f52fa94. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTPX2336408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedab9f40af3a785e5d63bc7c40ff8884ccbdf04ebcab52a1a589a55ac6d08f7b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZW9M2311900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a309c9655e1755f1d777132b5ef70f81b5bfca34944415a7fa82b0cbdcb871. 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/QZNJW2578023.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2537935.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2546118.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2546119.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2537933.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5G12500003.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2537934.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2537936.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2546120.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2546121.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2546122.