Something is going wrong. I have tried to change DNS, CNAMES. Also added html file to via ftp but when I open the uploaded file there is nothing except "page not found" message. Can't understand what is wrong... Is there any other ways to verify domain?
No, those are the 3 ways available. If you uploaded the file but can't see it yourself, you will want to contact your server admin for help.
You got a like out of the deal, proving that the old saying "All's well that ends well" is indeed true.