Preta Maria Gadelha Gil Moreira (), better known as Preta Gil (; 8 August 1974 – 20 July 2025), was a Brazilian singer, entrepreneur and television personality. The daughter of Gilberto Gil, she has
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 0x2c5fb15383379eab016af23f734be92b5708403e2252f4980d6a4d32b4896d59. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d2ed59d-48f8-47b9-a02b-956cc662b665.json and https://artists.proofprofile.net/proofs/artist/2d2ed59d-48f8-47b9-a02b-956cc662b665.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).