Is there a way to find out if ex husband has been sending in form 8332 each year?

I signed form 8332 letting my ex take the child tax credit. We have one daughter, 13 who lives with me. For the past 2 years he rarely sees her. No overnights but once every other month may take her somewhere for a few hours. I really need the tax break this year so asked if I could claim her. He said he didn't care but his new wife said "no". Well, I revoked this by filing out line 3 of form 8332 and sent it to him certified mail. I know this will do me no good for 2015 tax year but is there a way to find out if he's actually been sending in a copy of form 8332 each year like he should be?