It does look like a die crack to me. I'd put it away (but then again I put most all die cracks away)! I generally find my die cracks on the reverse at the bottom sides of the memorial but every now an again you get a doozy that has a few of them everywhere.
http://www.error-ref.com/blisteredplating/ Look towards the bottom of the page and you will see what you have.
Well you learn something new every day! Sorry for the incorrect advice @EatYourWheatPennies and thanks for that link @furryfrog02!
Cracks look more like......cracks?(horrible explination haha) Not straight lines. Here is a link for some die cracks though they are more severe than what you will normally see: http://www.error-ref.com/?s=die crack http://cuds-on-coins.com/udc-1c-2007/