Mayra Corrêa Aygadoux (born 4 December 1986), known professionally as Maria Gadú, is a Brazilian singer, songwriter and guitarist. Gadú has been nominated twice for a Latin Grammy Award. She release
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754bdbd404f1a82bb85e35193ad68e9b1a66b92e6ca48bcd195f230bacec4e86. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04929e7d-dc88-45ab-8bf5-61916ceaad4a.json and https://artists.proofprofile.net/proofs/artist/04929e7d-dc88-45ab-8bf5-61916ceaad4a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28588790a7577b437920c8f80fd8dbc24cea7372691cc0420124cd917d83ab12. 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/BRAZ10900017.
Lamento Sertanejo (Forró do Dominguinhos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f0eb9a453413f47f38c392a16dc93ace9ed80371751afc1da486126515227d. 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/BRB9B1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa415cd5d34428d7780a184b8244a17d74adc5ca20c1bab0718979e7c8712ad30. 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/BROIA1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aa8b0574d5c9f3ac0edfc12791ab65219fab8d84b52346f770b4aa8c2f6600. 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/BRSME1200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa710aa6f8e54eaf3f8de69e3f5a205eb85789a0602d351a9608583e193b8f317. 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/BRRGE1100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce935c4196165580fa1e0f88a34780a1e15c6b28d3bfb147cd79a4ee24a008e. 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/BRRGE1100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cdcb1522a4c809c1a895108aa2b98afc766820e59c052ba6b69a3027b8c351. 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/BRRGE1100363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2fb58616db0635a43dd8b77545c3f944892bd82f702f8474fca7ae5292480f. 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/BRRGE1100367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bbf455e3cdb16bedd1a4ac3960071c379abcd5c87ca538a4f4ab4581c64448. 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/BRRGE1300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f55fd587b4fac30f78ee5d2ce492400e9f518d631e2e150271117fdaf0d51af. 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/BRRGE1300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f910a60fce5314c39a75943792240569e76be2e562811a67fa10919f640d95b. 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/USSM11205515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c91344b07ae356e6b1ed4da9caf0ae2716fcb9387d61c220fc1d628ec026d03. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BRD9I1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba61c3c2860d38f1e6f9e411617b428da6287e5ccf8ed71cf9f66751dd4120. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRD9I1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f55fd587b4fac30f78ee5d2ce492400e9f518d631e2e150271117fdaf0d51af. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRRGE1300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8d3842b340513611a0332c4033c2b6c43e18754dfd68d096d886053883e458. 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/BXRFY2000001.
Mais uma Vez (feat. Maria Gadú) - Ao Vivo
Multishow ao Vivo - Jota Quest - Folia & Caos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aa8b0574d5c9f3ac0edfc12791ab65219fab8d84b52346f770b4aa8c2f6600. 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/BRSME1200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81f1cc466144dc5c3f3bf42c29498b38c2ea096c4773f3d30f5fc66eacfe8ef. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRWMB1800553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75af37f0e9be8df9256e051bd4534f4903f6c1d1466fccd41e98237fa23a9934. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BRD9I1800001.
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 0x9f831fdae431f20a16fd1f93969941188934e25d413e7e1642861553286e2c8e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BR4GH2000006.