First download your contract as a PDF by clicking on "Download as PDF" to the right.

Open the PDF in Adobe Acrobat Reader and click on the attachment icon to the left.

Open the verification, choose "open this file" in the pop-up window and then click "OK". 

Copy the verification link and paste in your browser.

The verification should be downloaded and you can open it in Adobe Acrobat Reader. If the verification did not get downloaded you can click on "Click here if the download does not start automatically.". When you open the verification it will look like this:

This PDF will prove that the contract is still valid and securely sealed.