Luiz Augusto Martins Côrtes (9 May 1951 – 26 March 2011), better known as Lula Côrtes, was a Brazilian musician, best remembered for his collaboration with Zé Ramalho on the 1975 album Paêbirú.[ Allmu
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 0xf78d323dbf46373060f1acebcac0aa2a1410972a8d54e36c815a53d0ae8e4b0c. 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/1c3b9d31-6efd-4542-bd0e-8a999d28cac4.json and https://artists.proofprofile.net/proofs/artist/1c3b9d31-6efd-4542-bd0e-8a999d28cac4.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 0x919c35906fbe3954e1f93c65858f1fd4f8366d14d63b7585b48a3a9b04c3b9e5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRMAX1800508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9f354874e5b90abcaaaf851ee260b21a3a8c955c9c77ecb7ef23d7724128ba. 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/BRMAX1800511.
Louvação a Iemanjá / Regato da Montanha - Água
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de4e21c305a14d93794df5eb2dd89360658ba995a18f7a091f394b78dc60c94. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/BRMAX1800512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bbd6eb42c9946abf92bb363204ee6935c08ac4c6a9fd4285dc792cc198d923. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BRMAX1800513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5009b40e8f11a770d55c45de1da0d991353f31228b1cd20d94e11f652575198. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/BRMAX1800514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93cb2cca632101f4be01bd271c2745c4f7553e58133032d6a908240dd7e803c. 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/BRMAX1800515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaa48384540f1d3f2349a6f5bc44b763c75b00dad1b2826b9323303ba46d872. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/BRMAX1800462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a92a3017dc800c9c9945eb276e960f4451603ea001c763818648bac4436b045. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRMAX1800465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e081714f42c003483b520d0fc489ddfb75c3030dbcee7d802f5d6263bb8826. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRMAX1800467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbe63eed750fd24799946efe5a5b794cb22d878184bbd7869362d4ee41cc28b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/BRMAX1800469.