Learn
Understand the proof before you need it.
Plain-language guides to fingerprints, timestamps, file integrity and practical digital proof.
Start here
Two ideas explain most of ProofStamp.
Start with the fingerprint itself, then see how it becomes useful as evidence over time.
Basics
What is a hash function? SHA-256 explained
Understand the digital fingerprint behind file verification and why changing even one byte produces a different result.
Practical guide
How to prove a photo or document existed before a specific date
See the workflow from creating a local fingerprint to preserving evidence that can be checked later.
All guides
Go deeper.
Practical examples and explanations of what verifiable evidence can show, where it helps, and where its limits are.
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Trust Is the Invisible Infrastructure of Civilization
Read guide →: Trust Is the Invisible Infrastructure of CivilizationTrust begins where certainty ends. We trust that the person we are speaking with is who they claim to be. We trust that a document has not been quietly altered. We trust…
Ready to make a record verifiable?
Choose the ProofStamp method that fits what you want to preserve.