Typestamp creates verifiable proofs that a human wrote a piece of text by recording every keystroke made during the writing session.
When you write on Typestamp, every key press is captured with a precise timestamp. Paste is disabled -- the only way to produce text is to type it character by character. Once you save, the full keystroke log is compressed, encrypted, and stored. You get a link anyone can use to inspect it.
Sessions are event-based. Each session records a timeline of events: when it started, every key pressed, any pauses and resumes, and when it finished. This makes the audit trail transparent and a verifier can see not just what was typed, but the exact rhythm and flow of the writing.
A reference scopes a proof to a specific purpose. An institution creates a reference with a label -- for example, Software Engineer Cover Letter Ford Q2 2026 -- and shares the resulting link with writers. Any proof created through that link is permanently tied to that reference, which prevents the proof from being reused in a different context.
Keystroke data is encrypted with AES-256-GCM. The encryption key is derived from the proof ID and a server secret -- neither is stored alone. Proofs expire after 72 hours and are deleted automatically.