Generally with the magic of internet copyright info is embedded WITH a picture when it's embedded on a website. (Maybe not visibly but in the code). In my limited experience the only time you do have to deal with copyright laws as far as pictures go is when they're being published in a magazine or book. And sometimes being showed on television. On rare occasions on internet videos.
Of course I don't have expert knowledge on this particular subject. Hopefully someone else will reply and either back me up or correct me.