Hi Product Hunt,
We are Stampery, we provide legally binding proofs of existence, integrity and ownership of any file or email, using the Bitcoin blockchain.
You just have to upload a file, choose whether to store a backup on our servers or not, and click a button.
We also create a unique email address for each user, so you can just create a rule in your email and BCC everything. The best interface is the one that doesn't even exist.
Thanks you all guys!
Stacks Accelerator