Matheus Fernandes Siqueira (born 30 June 1998) is a Brazilian professional footballer who plays as a central midfielder for Red Bull Bragantino. Club career Botafogo Born in Itaboraí, Rio de Janei
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 0x38186b2eee0649c029b3b653772886cb0bc53417bc126358e029197fdd60a60e. 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/34c629fc-3f98-4591-a829-66f349f4f12b.json and https://artists.proofprofile.net/proofs/artist/34c629fc-3f98-4591-a829-66f349f4f12b.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 0xd856a0568101a92f88f3355d0ecf39ba63cdb2923367ec3f05d8a995ce4969e7. 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/BCDE52300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a3036b959a809d39edef283175e252a7b5ae3f40c93dcbb0bcfd25c0c0241. 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/BCBFD2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb241c6718b029f73268fa82125693f350878e3558a8b2ec618c5ae663f3b5565. 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/BXS2B2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf426d88fbc62e222a856b633f8ea184492d6d1046696693eb6ab6625df2fceb. 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/BCDE52200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a32bde32441e937e2731b4b356f413e1388351c78ea634990a2afe969e45192. 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/BCDE52300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40619d98e92f7906d7ea78add481d5a4f5b53b1910faa1da4323864f14990f7f. 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/PT5HD2210006.
Altas Loucurinhas (Uni Duni Tê) - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa208df2a34b27f58ae29b0917e9a17d0ac06582217842772f095667023a9a6c. 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/BCDE52200074.
Agora É Oi BB (Foi Só Te Esquecer) - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36107d499651babf9840597cc460bddee075e928f3dc79d91669e5dd07331350. 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/BCDE52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa208df2a34b27f58ae29b0917e9a17d0ac06582217842772f095667023a9a6c. 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/BCDE52200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84a65f43657ce90e65093592d6dbaa41ff551832cdc3a268c3ea04b41e8e298. 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/BCDE52300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e9902f3d86640da937f7c20bb96f54cb2a0e23b9a21da2943b3803c4e50a5. 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/BC18P2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b200afa001476e1d119e112706a8d081a58c4a96e6d33016607c058b021eaf6. 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/BCDE52400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f55c539e653c49e0a03ea603d03e5d63b34ee55a75feb4654dee3a2c5699e26. 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/BCDE52500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd05334c53a70dca2ed1c64f8d54e0e2a6cca6ce06385f58ec7ab585df27592. 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/BCDE52400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9869503c603b0efc6a09e8f8da09394d5b289c722bd8f558af55acda861863. 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/BCDE52400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbb642d6a4bacfa9cc39ed1e017ccabbba06e003a3933a1ca35b4d9d4bb8e54. 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/BCDE52400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b200afa001476e1d119e112706a8d081a58c4a96e6d33016607c058b021eaf6. 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/BCDE52400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346ec6205cb8febe10dfa641ad8a1abdf4b2c546191a02598aa73d35cec08afb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BCDE52400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba509754208a365b5c34a3bd6114b0cfeb468f181bf0b31a787cf856a9f4440d. 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/BCDE52400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a91c5efa618f86aa5038d3d24accc9d190d36350c2e995b691a01eb57d8f36f. 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/BCDE52400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2702e475656cddf4f0d6834060f757b162476e14b300aeab5bd730ff4a85c4. 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/BCDE52100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c72e04bdd9ada2f59cf7ca723b50c9c5b91a7bb599576e8a9ebfa4b0255cd76. 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/BXLVT2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba509754208a365b5c34a3bd6114b0cfeb468f181bf0b31a787cf856a9f4440d. 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/BCDE52400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf4f0f0dee6db0199527f2a35a1dc06faa75838419677545b237afde3d6c757. 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/BRY7C2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f55c539e653c49e0a03ea603d03e5d63b34ee55a75feb4654dee3a2c5699e26. 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/BCDE52500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbb642d6a4bacfa9cc39ed1e017ccabbba06e003a3933a1ca35b4d9d4bb8e54. 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/BCDE52400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d2ee115c6a323c660b22df82287e6347b3762fa5416c3d1163890640fb3a63. 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/BCDE52400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf423caaa501938f3e2faa034cdbaad41b441712d2f7a2cc31ca08bf604361f3f. 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/BRRGE2301124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4822eab0909c7876782bb713cd7948db1c926aa0af72e102ff00d7d84b76c96. 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/BCDE52300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab15e237749a442f122534ea21a6b554d2f5ebb55508c35f471b773aa9f2ba1. 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/BRTKV2300012.
Agora É Oi BB (Foi Só Te Esquecer) [Ao Vivo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36107d499651babf9840597cc460bddee075e928f3dc79d91669e5dd07331350. 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/BCDE52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263eeac46727f100da30e3b9f66a5de204d610d83220c51df112df917f812655. 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/BCM8E2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241b8b4e4dfc4257d22564f9c2be38a44d50b7c8f5052da5f991e835f1502f1. 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/BXG6R2200787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228ab6fbba51dd896e1b7eb11778e96a312b4d06eb3e8f52378f34d9ffe60a69. 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/BRUM72200494.