This is fishy...
If they were  serious and this was legit, you would have received some note from a take down notice from a lawyer or  communications from FAA or Shutterstock.

So, two days taking action...maybe that's the scam...they will send some court scam email asking you to pay money.

In any case, if you received their email, try to find out where the IP originated from. Maybe from some third world country. Bellow is how:

http://www.online-tech-tips.com/computer-tips/how-to-track-the-original-location-of-an-email-via-its-ip-address/

http://lifehacker.com/how-can-i-find-out-where-an-email-really-came-from-1190061668

I agree, this is a scam, please forget about it.

When I said you should deny all allegations and reserve the right to countersue, it doesn't mean you need a lawyer at all.

This is a standard reply to protect yourself. No lawyer needed.

If they had anything on you, you would have received something with substance by now and they would have identified themselves properly. Not doing that, puts them into a weak position if there ever was a court case.

Please ignore it all, relax and enjoy the holidays.

The IP address from the email from donotreply@fineartamerica's is: 207.150.192.50

It says Austin, Texas.

The IP address from the hotmail account is: 65.55.116.12

It says Virginia, Washington

So now I'm really worried...

Proxy web sites / VPN / other tools can be used to send email from any server and any location of world. People often used these technique to visit banned website, hide their original IP, anonymous surfing etc.

As Steve and others already said, ignore and forget it. I have seen your image that is nothing wrong with it. 


How to recognize scams
Scams can contain the following:
1    Alarmist messages and threats of account closures.
2    Promises of money for little or no effort.
3    Deals that sound too good to be true.
4    Requests to donate to a charitable organization after a disaster that has been in the news.
5    Bad grammar and misspellings.
(https://www.microsoft.com/en-us/safety/online-privacy/phishing-scams.aspx)


Fake emails often (but not always) display some of the following characteristics:
    The sender�s email address doesn�t tally with the trusted organisation�s website address.
    The email is sent from a completely different address or a free web mail address.
    The email does not use your proper name, but uses a non-specific greeting like �dear customer�.
    A sense of urgency; for example the threat that unless you act immediately your account may be closed.
    A prominent website link. These can be forged or seem very similar to the proper address, but even a single character�s difference means a different website.
    A request for personal information such as user name, password or bank details.
    The email contains spelling and grammatical errors.
    You weren't expecting to get an email from the company that appears to have sent it.
    The entire text of the email is contained within an image rather than the usual text format.
    The image contains an embedded hyperlink to a bogus site.
(http://www.actionfraud.police.uk/scam-emails)

They wouldn't use a hotmail email and have an error with their English if they were legitimate.  Scammers use hotmail and usually make mistakes with their English. 

[OT] Sadly, plenty of genuine emails from well-known companies contain grammatical/spelling errors / typos. Including, but not limited to, superfluous or missing apostrophes.

Thanks guys. I really appreciate all of your input No new emails from them.

Now I'm just focusing my time on Christmas backgrounds which won't sell. Cheers!