Letícia Pinheiro de Novaes, best known as Letrux (born 5 January 1982), is a Brazilian singer-songwriter, actress and writer. Biography Born in Rio de Janeiro, Novaes studied acting at the Casa de Ar
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 0xb3dd5ed30f20adca63314e3130d828447cb3d57ed3f88f9d620163e7c28b7d34. 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/3dc75735-a58c-4a38-8da5-b4a1879167d0.json and https://artists.proofprofile.net/proofs/artist/3dc75735-a58c-4a38-8da5-b4a1879167d0.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 0x8f2b6f10b430be666fd17aec76b3722bdaa2955f12b4c58543838117f7d3843b. 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/BXATA2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7a9cfe8dbcb35f58020263d0e8e04eeb8303b9484545002964e8cf230bf3db. 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/GX53U2011282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9839c9917850de2b20aa6f75d35f509aa0154ca1aced49446b1921e913e0ee55. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BXXIP1800016.
Cantada (Depois de Ter Você) / Já Reparô?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9839c9917850de2b20aa6f75d35f509aa0154ca1aced49446b1921e913e0ee55. 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/BXXIP1800016.
Boca a Boca: S1 (Música da Série Original da Netflix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193dbb22638d4aac969ee23a37bae811025880e946f90d54771d33cc1cbe0749. 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/QZ8BZ2000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bac554c441b85b4ddc6af42be084949bb3b5c5241b0b05ac633ed55c877331. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXKBP2200120.
As feras, essas queridas - Ao Vivo no Coala Festival 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877d91ef02cde46e662588169058f17b82ef6ef1025cf6f51cae687236069e09. 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/BCNMM2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd426820c0f687e99d6ec65d9abbb3342ec086a73366b60a0e0f79cd22b89f169. 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/BXSVC1902780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8baacaa68ced0e3fd4b677ef1be7b14d4f13e8c407a8a10e5b71e70aae08e37. 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/BXSVC1902782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847658c5eb247bba25839427b345563e11297ad8829a246fcd2185dffce926f6. 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/BXSVC1902788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb48e3a11d762116533e51294309dab2f5badf95200e5f57f544ebe9105a0815. 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/BXSVC1902794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0691f3f9fea7277b528b2d0ba5c2f203a34bbbcb3e62c6fe1234f3a08a0ca632. 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/BXSVC1902796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0865eb53af6512bf21a46c73bdc4ffda4cb13c90c35669d46e683109a5f1748. 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/BRRGE2009638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3134cd47c69c4cb3b019d63f1936d12a469f541f313412e2c93d69708ac81f5d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/BR6K01900001.
Coisa Banho de Mar - Tin God's Club Mix Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed0ce3795528be81fb0401ac3f416b8ce48d898609515f282d7d28b61e7ee1a. 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/BR6K01900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7e902edc1e1d062083359e3eae489eac9e3cf7b7185f028161b23510643bc3. 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/BR6K01900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4766ae6a4badccba0246c69578890d04c4033c7e01a0b721953030a9ac0820bd. 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/BR6K01900005.
Ninguém Perguntou por Você - Rosana Rodini & Mauro Lima Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73edb678aae770e39b1d03d01fb74829b030db263b1ac0baaf8834075fc6482. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BR6K01900002.
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 0x101c3fe153f4d591941cbb68d0a205d3703d584cb30448031a03bbd30138e742. 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/BRJ052400017.