Marcelo Luis Do Nascimento (born 20 October 1980) is a Brazilian former professional boxer who competed from 2007 to 2023. At regional level, he challenged once for the PABA heavyweight title in 2012,
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 0x8424d24b1381c3ab36a8e09c9ddc7f2aeb95b1848d377f945ebd652a591e69fe. 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/454b266e-d2d4-410c-b5d4-db74ddfaef99.json and https://artists.proofprofile.net/proofs/artist/454b266e-d2d4-410c-b5d4-db74ddfaef99.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 0x5e961b51c37584ef2c13e060145e126856e60cbd53f2be2bc0dcebc6b405a182. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BRNCP2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6238655383677fc3bbe62b93c51530d3845df3dd9e943761ef7fd82e4183bd2a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BRNCP2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb790f3d07b37558fbc58fdcebd547091ffe0603e690c41f68fd6b020180e889b. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/BRMKP0400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b171428ee6b6d89f44fea4b9012f9f9e363abe498afa3d4b35eba408d8ba26. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BRMKP0400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12c8ff311333646afcee5d26e4d76c90f4effcaa8aa2d769a87897e42c924ff. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRMKP0301305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70a34d8b15cb32a19b8f69cccdabdeed23561732902b98aeadb55424e780c49. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRMKP0301307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fe3bc2e3ac13eb43a949307bf7c35625329985344f15f6a99f6e978c72e8df. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BRMKP0301308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313110c6700a35f0495dc69c60d24c66bff2dd8677e0695ac775083813bf0fa6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRMKP0301310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9deaa1039f084dd8805d54b4b465c52f313deac5fe3661953317893c3eac81f. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/BRRPG0500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625bcf160c5b1d5bc0f197961b2ff8c3de3f868f5f119292ae8de7f4c585116a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/BRRPG0500253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0770645cf5ff6d482832c136c2cf28054634b761eb3e050077af0114aadc107. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRRPG0500233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2097a570d5fca4e56fd0aee0e772c45b1f98a4e25c9ed6c9c032e21872d16a20. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRRPG0700197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69258c14732812a8d29665e4ce51cda6a74e5c2eb8903446431d561dff012ee6. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/BRRPG0700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acbc1d9843ef98bad9ee2821268b6d81f589f43078ee739d6d48c8671879cdc. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BRRPG0700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e89f83211d0248ba608c1a32fd0fa1ed7cc8c060aa05fba8b9dc09927398cb. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/BRRPG0700198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb46477c267e67c9e4e5c0b48e2c8279d5de7f0f1feb8bdbc7bfdd186beb062. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRRPG0800183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca660b5a2f224209b030be507d7d418e895b1b2bf878edb75082f3c22c585215. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BRMC01000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0eac54062cff1888b651fff7dc1cff4734a3c621ee06cd33687c8e52243cbc9. 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/BRMC01000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee4016ea2c173e74bc73b80855b2d48aac8a0425a19f04133932ffc17905082. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BRATT0300332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f2dbbc800d48f1c8c3e537d7cb1d3463e523e296d0cad2fac228a98a36ee56. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/BRATT0300336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd39c747a35e6bbf50774e5b478571046c3c5068eb64b085979e42328c9eeea. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/BRATT0300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dea50f8fd6195401e2d5484ef01c060baf4d4a4f42f7cf8b7a2f100334185e3. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/BRATT0300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ab4804ecfec557f06429ebabf468cd5c1cbff522cef49b51b796d1dcc9333c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRMC01800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b25a66eacd03a7f08eff15ea247f61bdb338085c7303a03b1da5eb3c55e1c2. 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/BRMCO0300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85017c121e38a5bc43431ddf24178e3feab61e7c8ef1a68057de6335f42e7608. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/BRMCO1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51c8fffe5fca50981731a6ef8fc46870ec39ff276f6022b617c6cc3cfb72c19. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMDA71852439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7111f4e8ea038554ebe6809b000ad8e3118c9ec7ad278676d62d376f4f889d41. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BRMC00600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b32c69bd1940418706165241284d642dd32499d39c245cec2f6d57abbca3c6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/BRMC01800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afb5debe7ae2c4f5122a2274d660b636a88493c1d72d055caf702430d645f2f. 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/BRMC01800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64b8b3856b4b5ca0548dc422583589a790e02b06108eb51169f72dbb58e1348. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRMC00600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd99234191beba4dd4a3fd381fdb30a4cdb0a9add5b8241c9e8e9deed02decd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRMCO1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b1ec5a55567406eaa2a74292eeebc783221ee9c75de5e35017f70eee9bf478. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/BRMCO2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faee7f0122e23a95b56c737167272df4f9f6001f1a63a391a420bafd4a262d9. 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/BRMKP0400663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4073336978f22027f55a6917745505f4dd3e006ee7f6af3131f2e7b6fedb29f7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRMKP0400152.