Mayra Corrêa Aygadoux (born 4 December 1986), known professionally as Maria Gadú, is a Brazilian singer, songwriter and guitarist. Gadú has been nominated twice for a Latin Grammy Award. She release
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 0xe73cc6730bf9b95b61661be9b3c13cc0bc34d19637a657d26c27d305c8f609eb. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dec8669a-d9f2-42d0-96ab-7a413eb4e794.json and https://artists.proofprofile.net/proofs/artist/dec8669a-d9f2-42d0-96ab-7a413eb4e794.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).