Maiara & Maraisa is a sertanejo musical duo consisting of twin sisters Maiara Carla Henrique Pereira and Carla Maraísa Henrique Pereira (born 31 December 1987). Both of them are singers, songwriter
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 0x257d6941eb36ec4d395c2047297f62dc94476925328825a5950c3c5f11b6a6d1. 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/9deb8886-3f17-4bd4-bd76-3525ae30017f.json and https://artists.proofprofile.net/proofs/artist/9deb8886-3f17-4bd4-bd76-3525ae30017f.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 0x556f107ddd27e511792c7c3e8e26083b5bd6f80c15f926a75cda35ce1582d49b. 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/BRSME2301238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c85e5c6458dabbebc6eb5c09ab6b5afa7daa6fbd91d86f509ed81079cd2849. 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/BXWOW2100043.
Até Ex Duvida (feat. Maiara & Maraisa) - Ao Vivo
Agora É Que São Elas 2 - Mulheres do Sertanejo (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe673a12654966ed1a6a9decaa6f4b66e7950b9cb9ae12d2bdb92c34531fa57ae. 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/BRSME1600642.
Localização (Ao Vivo) [feat. Maiara e Maraisa]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbfd35d01fe7af2ff5197203978416fcaafae64668c17115a4442eac99001ba. 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/BRJ3K1600001.
Mensagem Só de Ida (feat. Maiara & Maraisa) - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152bff6c8705767f1f3df74c76f2bc3eb63aa4eb8cd098663e2f6bf262e81abc. 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/BRSME1901648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a4cdbb152c251d53145d1e1be827c996e4b1e55bc9a79447af44241ebde95b. 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/BRUM71707006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d1141f50f8ac21b44691190aad6caf4a2d8c29784e6bd52552144d0b6561d2. 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/BRWNV1600315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe219e7df6364a9a00fabd5c9dffeda7fe0b834680e516f9b24ce9973055b33. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BR0QA2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274d608e294f83f6df1167b0af0acb6ba2adbee537edbc6846da9eae6ab993b5. 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/BRWNV1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ed931bbfe8066218beaf3fbf6d7f5ae64988b465fcbc222aaa45457f10786a. 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/BXDW72100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd77670bb9a2257f29a7ab30344c02f8364c98d06a8ab30600c0497181f83d96. 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/BRWNV1600320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d72f5a1c4255caeaa165a87c92270d05937cdecdbb9c11b90145b70148fedf. 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/BKU8M2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553fe2c75825063c9aef12e1ed20d0d2c54fbb3548d2d4e0e4defeddd1ec95a6. 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/BRSME2102353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b41a84768353b8ede8ed19fc5c47e14e4dec340d8f9bf0c01e487ad098aa7d. 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/BXWOW2200287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2783d06b022619eaad6b03f52cb3d60b50958a1da6f0d887973a60041cc236b2. 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/BXWOW2400045.
Daniel 40 Anos: Celebra João Paulo & Daniel (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74af8bc0fad456e779fa1c2f466481bd4f2b1deb31407d0e4094d5e102d3dda. 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/BRP5I2300002.