João Martins is the name of: João Baptista Martins (1927–1993), Portuguese football forward João Carlos Martins (born 1940), Brazilian classical pianist João Paulo Neto Martins (born 1988), Portugues
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 0x49bfd83caf94543a408921c55899e17927cab80f746a8adac6e22b1316af90e5. 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/5f7cc2a5-88d8-45ff-b8f8-b25475c65caa.json and https://artists.proofprofile.net/proofs/artist/5f7cc2a5-88d8-45ff-b8f8-b25475c65caa.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 0x73ee3f30de42fdc41817cc41dd952870ce2f6dbffa6d8b46853f98a33150b811. 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/BXDMJ1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20c2c4d4c0e4aca495bbefd3e1c904add1d4d13b5e58fc4bcbf9d531da2df72. 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/BXDMJ1800014.
Samba Social Clube Nova Geração (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccfc4a6777830acf19ceaf2553fe92d83454e529f5bb733a36ebeaee3df609e. 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/BXEPA1500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc4166edbf586d3ef88a3392ee13adda533873ca152f014a5a738df630297c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXEPA1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c31774d405b2fffa4d5fa4e8d00ff0f61ed73503c141e7569c9c72a2ad25a84. 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/BXEPA1500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c2cccf7221db5630a398416dc8ed83ebe662313abe4b27a7a76260cb7a8325. 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/BXEPA1500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694371918cae962c24176f969295c71572d8212ed8a54fa3bfe3daaa0baa17a4. 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/BXEPA1500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c50f4c9b4387153024d648e6583082d7840294ea0af809b4410e07dbe216b3d. 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/BXEPA1500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28384a5299ae3cffbeaf276191b5456b2cf8106a5fedb7a94f777bbc7bebc751. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXEPA1500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0c23434f6ed895e84584e87e01efa55336616eddd6e1ccad4f3704ad0a2ef0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXEPA1500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906575f772af34e4279373b2bf6231858530334e36f27742514210d29a5daed6. 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/BXEPA1500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a781115eb0d8fde2735b9ebf957be49ad1850fa1e8bd0e93398929ada6bc7f. 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/BXEPA1500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddda27fcbb9fa1bca5b4b8751ceb04ec3bccf48e3958df6d666453d8b2d7eff4. 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/BXEPA1500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641ae35ddff62204ef7d3a7840919f7f8cb77e3794ecbe08c777743585554237. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXEPA1500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad975d6ab032c783b2c0b7d1e0b1d9fb0f0363463a41044b2e1c576bddfb1358. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCJR62100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa098435e0b011fe6e3a2223f1365de718f50f3cbd959cc59eec03d0ea8dcf861. 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/BCJR62100002.
Renato da Rocinha 10 Anos (ao Vivo) - Deluxe
Sambas de Macumba – ao Vivo no Maria Zélia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f370e2777e64571b906bc5bec9fa54ad2cd6cab5da7559a26552c697c34dd9. 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/BKORX2500211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77155d0c657000465afa87611be12840bd9bcfffb2781cda1566e8df1ec289ff. 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/BKORX2500213.
Canto das Três Raças / Pontos de Exú e Pomba Gira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0888cabdc9f9093aee46c923dd7a9c90f3ba23f260dfc25829ce93f73fbd82. 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/BKORX2500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa974ce7f19299a490ed1419b37d526d404832aa6ae1dbeb8b8dd3a45a248ffa5. 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/BRC832000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60c360b7308094d731fd0536eb40ea004f3d4112766a141dcce3d1bed0e6ba2. 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/BRZ721200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891a57bfb120b61d06735c8fbd7754ff39fd0fc6dbe8a6d7663aa86bd2e2f75c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRZ721200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a4fdcb8a630160fa37024db21cd2e5755791684594fa2d7bc328347464434f. 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/BRZ721200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f89f0e5175410b4b815afcfb81d8ab18e6c8f65eb0d4f6676adb46f4341386. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRZ721100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a0d7a3276b6c93ea337b94c9d6a670a8eab3a62053eab7e95cf5a2d9ba604. 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/BRZ721100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9efade92ff4ac77b6f42493fd29a790d4dd7712dc993eae389e7e767ec6ccc. 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/BRZ721100012.
Lendas Da Mata / Singelo Menestrel (Ao Vivo)
Pauperrecido (Ao Vivo na Batuq Casa de Samba)
Amor Calmo (Ao Vivo na Batuq Casa de Samba)
Amor Calmo - Ao Vivo na Batuq Casa de Samba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6078e3eefa55a00d6615a17223e267d71a0b2c28a54dffc956e6b644e4b0f401. 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/BRC832300313.
Receita Para Amar/ Canto De Rainha/ Amor De Madeira (Ao Vivo na batuq casa de samba)
Triângulo Amoroso / Sem Ataque Sem Defesa (Ao vivo na batuq casa de samba)
Inconsequentes / Sozinhos (Ao Vivo na Batuq Casa de Samba)
Quando A Dor Já É Demais/ Pra Acabar Com A Tristeza (Ao Vivo na batuq casa de samba)
A Caixa / O Pacto (Ao Vivo, Na batuq casa de samba)
A Caixa / O Pacto - Ao Vivo, Na batuq casa de samba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d2b752e1a02d143f697b2b2fb9123818a76b144f3ace4eef09f8dabd37ef2f. 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/BRC832200180.
Seguindo A História/ Pão Que Alimenta/ Vara De Família (Ao Vivo, Na batuq casa de samba)
Seguindo A História/ Pão Que Alimenta/ Vara De Família - Ao Vivo, Na batuq casa de samba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03ac5c000a1762b993a606d933602048bfaf5f9137fc618ab8a1257e8c034ed. 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/BRC832200156.
Bom Gosto/ Pretas Brancas E Morenas/ Já É/ Roçado (Ao Vivo, Na batuq casa de samba)
Aquela Dama / Sem Ataque Sem Defesa / Papo de Homem e Mulher - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfbf816ef5ffa9a5229593ca6259e32d6b8ba25eaddb8b30b4795acd99728c6. 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/BRC832000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a65238137f960a2ff0307733446c3e08bd1dc64cecffca49eaeb62abc171fd. 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/BRC832000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67dc6a7b6760ac5fac21ded521c529a0aeb10828de807887816094a1280dda1. 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/BRC832000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49470343c00886199a607049cf91886913e2f9028db0489907d41e116888445d. 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/BRC832000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a546d01d6ebbf7532121f3ec9d146227d69f4fdffeff0ef9b47e989cba552a. 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/BRC832000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f9ff3f58e9de50cfab192be9a3a047740444625bcbb1fc1f80b1efd68315e5. 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/BRC832000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffb0078a1af668f6c292b701350f10788398e6adce9256bbd57d0f2a226be49. 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/BRC832000028.
Se Você Me Der a Mão / Valeu Raoni - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56330a98c24717ef7145b9a9808eab40ec612d4269120a4086ddc926491c119d. 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/BRC832000029.
Pra Você Voltar / Água Benta / Gente Malvada - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bcba4869d4ca0edc70291666f68a4cb6623a89b02f5d20a1918a69b3d2d301. 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/BRC832000036.