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Brazilian Lottery Portal Uses SHA256 Hashing to Make Data Changes Publicly Auditable

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A Brazilian lottery results portal, deunobicho.online, has implemented SHA256 content hashing to address public distrust over potential data tampering. The system generates a cryptographic hash of each lottery result's canonical JSON at the time of publication, making any subsequent alteration detectable. Each published result is accompanied by a public evidence page displaying the raw data, its hash, a timestamp, and a link to the official source. If a correction is ever necessary, a new evidence page with a new hash is created and both versions are linked in an audit log. The approach allows any reader to independently verify that data has not been silently changed since it was first published.

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