How We Make Sure Your Memories Stay Exactly as You Left Them

Most apps that hold your family's photos and letters ask you to take it on faith that they will still be there, unchanged, years from now. We would rather show you than ask you.

The short version

The moment a photo, video or voice note arrives, we take a fingerprint of it: a short string of characters calculated from the file itself. Change even one character of the original and the fingerprint changes completely. Then, once a day, we publish a summary of that day's fingerprints somewhere outside FutureRoots, where nobody can quietly move it later. Including us.

That means two things we can actually stand behind, years from now.

What this proves

The file has not changed since the day we recorded it. Not by so much as a single character. If it ever did change, its fingerprint would no longer match the one we recorded, and the mismatch is the thing we would tell you about.

We recorded it on a particular date, and that date is fixed. Because the day's summary is published outside our own systems, the date cannot be edited afterward by anyone, including by us. That is the part most people assume is impossible, and it is the part that matters for a message meant to be opened in twenty years.

What it does not prove

We would rather be plain about this than let you believe more than we can deliver.

It does not prove what a photograph shows. If a picture was made by a computer and then added to FutureRoots, our record faithfully shows that this computer-made picture has not changed since. It says nothing about how it was made.

It does not prove who made it. We record the file, not the photographer.

It is a record, not a backup. It does not stop a file being lost. Please keep your own copies of anything irreplaceable.

It does not stop someone with your password. Anyone who can get into an account can replace a file. What they cannot do is make our published record agree with the replacement. That mismatch is exactly the thing we are watching for, and exactly the thing we would tell you about.

Why this matters more for family memories than almost anything else

Financial records get audited. Legal documents get witnessed. Personal memories, the things people most want kept whole, usually have nothing.

A recording of a grandparent's voice. A letter written for a child to read as an adult. A message set to arrive on a birthday two decades from now. These are the things where "is this still exactly what was written" is a real question, and where, until recently, nobody could answer it.

What it means for the person on the receiving end

For a grandchild opening a time capsule decades from now, this is not a technical detail. It is the difference between hoping this is what was written and knowing it.

That is the whole point. Not the machinery, which you will never have to think about, but the confidence at the other end of it: this one is real, and here is the day it arrived.