Verify file download?

[kornmonkie]

Hey,

I use Amazon.com to display pictures for certain items which are sold on my website.  Up until now, I've just hotlinked from my site to theirs, because it's allowed with a resellers account, but I was wondering if it was possible to GET the picture from Amazon, store it on my machine and then verify that something was downloaded from Amazon.

So if a pic was downloaded, it would store it, and then place a value of "1" in the database.  Otherwise it would place a value of "0" if nothing was downloaded.  Is this possible?  Need more info?  Any help would be awesome.  Thanks.