Everything you do on any website is being archived even if you delete it. To find out if a website is telling the truth or not, use the Wayback Machine or the Who is.

Wayback Machine: The way back machine shows you and tells you what the website looked like a few years ago.

Who is: The who is tells you who owns the website and the persons phone number and where he/she lives so you can call them and ask or you can see if a school owns it and most of the time, schools are truthful.