Joyce da Silva Fernandes (born May 13, 1985), also known as Preta Rara, is an Afro-Brazilian rapper, activist, and television host. A former maid, her work in internet activism against the subordinati
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 0x2bbda19fe4b62a615b8d57f9a791f202aadd3b33797ad83203887ec36e457691. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c378472c-e9d4-4ade-a2d9-84c6d6dff538.json and https://artists.proofprofile.net/proofs/artist/c378472c-e9d4-4ade-a2d9-84c6d6dff538.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).