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