Where can I get a picture of a specific aircraft by registration? I'm actually building a website where I want to display pictures of a specific aircraft. So I have the registration and I would like to show a picture next to each registration. For example I have the registration: A7-BCW

I want to get the picture in a way like this:

website.com/a7-bcw.jpg


Is there any site where I can do this and where I'm allowed to use the pictures for my site (watermarks are OK and I would also display the copyright information)? Of course there is no site where I can look up every aircraft around the world, I just need it for the common airlines like Qatar, Emirates, Singapore Airlines, Delta, United and so on.
Have you checked what data is used at flightradar24.com (http://www.jetphotos.net)? Probably only commercial airliners, though.