Mauro Diniz (born 1952) is a Brazilian professional cavaquinist. He also has a career as a songwriter and singer. Biography Born in 1952 in one of the most traditional neighborhoods of carioca samba,
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 0x93b5359f04af18d1ac4cc9cde8a90e224dccf32e039946c6e1a0009a296f1a87. 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/b5b59423-a782-4911-b680-140082d5ac9c.json and https://artists.proofprofile.net/proofs/artist/b5b59423-a782-4911-b680-140082d5ac9c.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 0xcd4ca6a3d992cf98dba2227b0c6ff2390dfd391c0e6da25aa11375607a6e1988. 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/BRRGE8790032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad13e9b61710cc5fb11c3a75454320eaa34de49c1b411a60fc351d635405fd67. 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/BRRGE8790034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf932ba4442a3ba395ca5cb0da0c2d1ae5a0551f0c02b0b8b61026e9656d92841. 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/BRRGE8790035.
Pot-Pourri: Serrinha, Custa Mas Vem (Serra Dos Meus Sonhos Dourados)/ Jequitibá/ Portela, Coquetel de Sambistas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c675074023d42bda12d91e5a827a553a399a18c2322580a45b1ce3a8097b69. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRRGE8790037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb9b77e0218b4c79554b3ee202a0b1c16bba8d13a6b817007a7aa8c238bb65d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BRRGE8790033.
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 0x58044be8e4e21f170ba58eb0b42d4c6a83fa242befe22ac7ebd01ce0f048b678. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BRRGE8790036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd555da24d2cf342be23842f2d6af29cc4cd7f1b49abc5f15560bfb2358f945. 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/BRRGE8790038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff0aba6b2bfc352ed6c421ba2b252465113fbc207ca44c8b6aa617391101f0c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRRGE8790039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdbe140d0011081694cc6a06bf0557cf9ad0107a6e9bd76317008f19d46428f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRRGE8790040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d276e9212ec1c2778573fbbf5ffe3553110eab05f1fab80b5a1ad40f5b6c16. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BRRGE8790041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554cde13a6aedfd014af8701d34dc4a24ec74ea482108cc69f6e91a7e552b01f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BROOB2200256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9031e42b4e86ee52709b403d25364aa5f3b5d2fe0204665c003f9697a4e3935. 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/BRMCA0300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9031e81c065fdca57d2e9d987e39c42dda74ce311d496a55e63e214576cefb0. 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/BRMCA0300133.
Hora Da Partida / Chegou Sua Vez - Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fddb80a1738def82c3c2f29a34bf0c064e43cf6bfda9041709873eb22344e6b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRMCA0300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac95cddde3b72f53681a8f6fc27460f7f51774d44a2174256c9b2a201ecbb04. 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/BRMCA0300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ac5321725ef015b2cad060526bd734738bcc648213d3deb5609fd03902e56c. 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/BRMCA0300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cc24b5987c1db1746becbabbd1c0166de6e2320e97c09ecdf6ab13e97ec680. 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/BRMCA0300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806f689802976a4aa9eba382ed5d4c10ece08eb8739d10c99aa87bf064a0c62c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRMCA0300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd1f3278d922a05cb033f6a3529a410ed8d6d455bc93f77aff81100b3c9b05e. 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/BRMCA0300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123e666ed3d5bf70f4e421b58cba3c9aeae45a78b4c88e5bfdaeb5560a493e4a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:42:15Z), 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/BRMCA0300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2807553402128880e0a58ff9ae717dbd31104d53f44cd2d76e8ab689c6b61b59. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BRMCA0300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5d70890e1b24b215590a8b3cef13c343caa552787ef14b836ae0421969c3c1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/BRMCA0300137.
A Luz Do Vencedor / O Sonho Não Acabou - Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8e2e2efab293c3cf38a29c24cdb7e800a4d6a5e666d34ebe99bf17cfcb58ad. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BRMCA0300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30a2aca23406d1a4577e8625db092c902cfa415cf4e4299b65eea2b7ffbf221. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BRMCA0300144.
Mangueira E Suas Tradições / Passado De Glória / Hino Portelense - Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa80672981602d2b45bfe713268f07e22393ebb5076f51808bc338eba39200d0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRMCA0300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94affd6656266e565257367dd4c1bb06bcb5fad81500d27c0179835bb075abda. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:03Z), 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/BRQCX1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa9748461a53d7a4eed80ef6fd2c4545c72781ee974a044b3975a9b86639642. 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/BRQCX1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c1d842c970ca80b3bd7ddcbca3ed1863a78c51d7f315c4fab9544342c8d9f6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRJWC1800076.
Dolores E Suas Desilusões / Coração Em Desalinho - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c9539dbfd113bd7a71508743a709e5a60064a2ff454b62c13f6949ad0dbe1a. 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/BRUM71200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9277ae683e1a2e3fce0253bd3ee9512debca0801644f4428ea71e846269135. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BRH9O1600001.