Make sure your website is secure, i.e don't get 'hacked', if you are looking for people to send you ETH or BTC make sure your address doesn't change on your homepage.
Are you suggesting to run second server to verify your page hasn't changed?
Can the page not be signed using BTC/ETH address so reader can verify it's unique?
I am very curious on the best solution to make sure you site is not changed. This probleem is bigger than just ICOs
You could probably write a script that runs from you home machine that looks for the html tag that contains your ETH address, if it changes then get the script to email you or alert you in some fashion.
That's a good approach, we use a similar system at
www.witcoin.io. I also recommend separate your ICO logic in another server and isolate your web server. Limit your server access and configure access notifications. Also remember to update your software (firewall, web server, CMS and plugins) to the latest versions.