Leandro Roque de Oliveira (born August 17, 1985), better known by his stage name Emicida, is a Brazilian rapper, singer, songwriter and MC.5 minutes with... Emicida Interview on timeout.com.br The
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 0x5661f8929cdd57eb3ab02e43905a87cbf922ccd862c3690abb4ee72660423048. 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/17581853-d040-445e-9c97-b52dbad28b5a.json and https://artists.proofprofile.net/proofs/artist/17581853-d040-445e-9c97-b52dbad28b5a.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 0x32d6b2c6c15a4d1ccc28af260358a392ca2b110734cdaf02f336f456502acab5. 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/BRX6F1300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f7846c8bc2710fcbc148e0dc30ece823f060a9e7a32540bd6bef38e75c8819. 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/BRX6F1300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5353bdd426ff46bb7e3b712a0b9e62645b130c789d1eb1710cc220140bce9f77. 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/BRX6F1300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf37433f73275dd9b375ef7ee29ac24df4e1ef21d42a3153f4f903e3ef1b8f21. 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/BRP0J1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f06be27bb3f67ff1464c7ae3f4f2d08497c69bb82706338d9be293d5d1c6535. 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/BRPJ01300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd440b93d1bce27c8753af1eea4c59f986a7ce90fa7d20683c9ed97bd88f71076. 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/BRP0J1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc7d7e73b94a80792f91dfefba79ca53803374919d895e2d8f05be316388dcb. 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/BRX6F1300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54e9f02dd6d4cce54a71d36d3bca5b9b98cd66fc9125fda0a40ddd71296da8e. 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/BRX6F1300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95751a1fee29a1c1fab6222987b9c04cc4808da9594a6e891b0ef4622b01bce4. 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/BRP0J1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3c1222e081f0d1882beae79c0aeb77be6d1e3fab808e8329d302805a34b296. 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/BRP0J1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61ea02bda81e5a0228045d8aee7ae366f185212815802a7b3fd6fce9c282813. 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/BRX6F1300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1746e3c5f23e4dc095e9aca108bf0b646b1fcaff8f2302b71f01eb1c930586b7. 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/BRX6F1300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bd35d857def42d3a9482958b057ecf15f9b8661ebf3f0af25a84a7c7fcda5b. 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/BRP0J1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56de013d59f2d6ff56f7ac4e982173d70020d1625c9d9d47d7bc7ef114f6873f. 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/BRP0J1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803103f866ad22b8037572e3347a4cc44ca16e2e2dae0f81e0a13981cce6aa1e. 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/BRX6F1300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d7d3508a162a192c7794e6bc3460a9e4b671a373b5b5dcc5e0befe343c8212. 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/BRP0J1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc254f1fa7d4babd6487ac9edbaaa70cbcc57b4dcdeca7726da46d11d75b45b. 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/BRP0J1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6099a8fef5a9e426a1b6454c4f2fcbc05d09e388af3738aec9b0a1943864df. 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/BRP0J1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe14061d154fafee4b3f223b24d46c31f04425bf395a7bbff68583b02bf38caf. 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/BRX6F2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec0dbf1c94ad1053a364c3ef124867d61018d2a366e32bb28b9e62e6581128. 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/BRUKM1400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35de46b8ebfd2f619579a6e3f466ac41b8879a7a68b246190ac629167f90d05. 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/BX3FM1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f446ca51c319e75c0731d1122b5f948da3e05735244964e25200f95ddad344d. 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/BRX6F1400011.