airproof secures your stay with blockchain security.

To do so, it creates a digital fingerprint of your airproof video, and saves this in the blockchain – creating a timestamp which is extremely tamper proof. Learn more about the inner workings of the blockchain and how we use it to secure your stay in this site: Security and Blockchain infos

For the proof to function, you do not need the airproof app itself!
This was important for us in developing the app: It makes little sense to secure the proof on a distributed and secure database as the blockchain, only to then rely on a weak link outside of it.
However, you do need both the video file that the app generated, and the timestamp that was registered on the blockchain, for the proof to work.

This is why we make doubly sure, that when you want to delete an airproof in the app, you know what you are doing: There is no turning back, once this data has been deleted. That’s fine if you really do not need the proof anymore. But what if you just need to make space on your device?

There is two easy steps to take, so that you can “offload” your airproof from the app:


Send yourself your airproof email

  1. In airproof, go to “my airproofs”
  2. Click on the airproof you want to offload
  3. In the detail view, push the big green button labelled “GET AIRPROOF EMAIL”
  4. Enter your email address
  5. Click “OK”

You will now receive an email with all the details you need to..

  • Replicate the fingerprint of your video file (SHA-256 hash)
  • Look up the timestamp on the blockchain that we have saved for this fingerprint


Save the video somewhere else

  1. On your phone, go to the file manager (or connect via USB to your computer and access your phone’s storage there)
  2. Go to the folder “/storage/emulated/0/Airproof” (if you have put the apps data onto an SD card, you will have a folder called “Airproof” on your storage card)
  3. Select the video of the airproof. All airproof videos are named in this format: airproof_YYYY-MM-DD_hh-mm-ss.mp4 (Y=year, M=month, D=day, h=hour (24h format), m=minute, s=second), this will make it very easy to identify the right one.
  4. Copy the video to where you want to keep it safe. Make sure it is a safe place and that you will find it again.
  5. Make sure that you DO NOT CHANGE THE FILE in any way – even changing the file name will result in a different fingerprint and it won’t match up with the fingerprint in the blockchain anymore!


Thanks for using airproof, we really appreciate it.

And by the way – we are already thinking about making airproof even more comfortable for you to use – a secure web-based storage solution for the airproofs is in the cards for an upcoming release! Check our roadmap to see what we are up to.