StampR: Turn digital files into verifiable evidence

Hi Product Hunt! I’m Boyan, the founder of StampR. I built StampR because creators and businesses often need to document an exact version of their work before sharing it with clients, partners or collaborators. Ordinary file dates and cloud timestamps are not designed to provide independently verifiable evidence tied to the file’s precise contents. StampR creates a SHA-256 fingerprint of the file, records an authorship declaration and applies a qualified electronic timestamp through an EU qualified trust service provider. The user then receives a certificate containing the information needed to verify the file later. The original file can remain private and does not need to be stored by StampR. StampR can be used for source code, designs, technical documentation, research, photographs, written content and other digital assets. I’d particularly value feedback on the verification process and which professional use cases you would find most useful.