unTamper – cryptographically verifiable audit logs for app events
Hash chaining before write beats S3 Object Lock for pre-write tampering protection.

Cryptographic proof-of-work for service disputes, but marketplace already exists and adoption unknown.
Home service workers, contractors, cleaners, and their clients who need tamper-proof proof-of-work documentation.
TaskRabbit · Handy · Thumbtack
Is it clear what this does?
Who is it for?
Anything confusing or weak?
Hash chaining before write beats S3 Object Lock for pre-write tampering protection.
Cryptographic proof bundles for AI agent browser actions—screenshots can be faked, hash chains can't.
SHA-256 tweet verification for skeptics; solves screenshot-faking with deterministic hashing.
SHA-256 hash chains for AI audit trails—solves EU AI Act compliance elegantly.
SHA-256 hash verification via CI, but reproducible builds already solve this.
Good explainer on PDF metadata, but this is a known issue with standard library fixes.