Maria Alcina Leite (born 22 April 1949) is a Brazilian singer. Among her biggest successes were "Fio Maravilha" (Jorge Ben), the winner of the national phase of the Festival Internacional da Canção i
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 0x40c7cd43905f71cbee30b7c4c18ba9530499a9e540810b8be35084899741236e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4027d354-0fd6-4f03-8f65-8cd1cde18e1e.json and https://artists.proofprofile.net/proofs/artist/4027d354-0fd6-4f03-8f65-8cd1cde18e1e.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 0x14382b26c95e6d6f0dc67eb0dad9a0ea1b1688fb170815ed8ced465c715580eb. Chain 2 (Bitcoin): anchored in block 957846 (2026-07-13T10:25:43Z), 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/BRWMB0200315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a49294e0799dfc2ab4fd708d937c45097c26b0df70e40aeebc0d4cc6198c6e8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:50Z), 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/BREMI7900607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf37a3911eb0f44b532a5d167cb0af808f4a8d0cba06bb19717d1d1f3bce6251. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:09:10Z), 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/BRELD1300024.
Espírito de Tudo (Canções de Caetano Veloso)
Tico-Tico no Fubá / Diz Que Tem / Mamãe Eu Quero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cd880404f62e6a1407a01bc270dd4f4358d471d26c3f7d9816e0bb5353fdb7. 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/BRECI1200085.
Rodrigo e Alice (Procurando Chifre em Cabeça de Cavalo) [feat. Falamansa]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a75fde26e65e9ec5306d09037cb12daaf782db4a54a225c1b34b70f5d60c16. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BRGRL2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a9cbbd48d5f0edebbe8c0e73d54dbce86583c7c70f4b0bbbce3a1280780b61. 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/BRWMB0200338.