unTamper – cryptographically verifiable audit logs for app events

Show HN: unTamper – cryptographically verifiable audit logs for app events

Based, unTamper – cryptographically verifiable audit logs for app events works in show hn launch.

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https://untamper.comBuilt this after hitting the same gap on multiple projects: teams log critical events (admin actions, permission changes, PII access) but have no structural way to prove those records weren't altered after the fact.Immutable storage (S3 Object Lock, WORM) are common, but it only covers tampering after the write lands. It doesn't protect against someone with DB write access, and it doesn't give a third party, e.g. an auditor, a way to verify integrity without touching your infrastructure.My approach: hash chaining. Each event is SHA-256 hashed against its canonical payload + the hash of the previous event. Any insertion, deletion, or modification breaks all subsequent hash

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Website: untamper.comBuilt