Can they tell how old u are throughout online credit card ordering?

I ordered concert tickets to a Wiz Khalifa concert online thru the venues website. Irony check out it asked if I was 18 (I guess for explicit lyrics?) I'm 17 but old enuff to hear cussing. I lied nd said yes, figuring the transaction wouldn't go thru if there was a problem when my card was checked, then id ask to use my moms card) the transaction went thru but the tickets will b checkEd at the gate and voided if any terms are broken like duplicating, altering, etc. Is it ok that a 17 year old bought 18 yr. Old material online? Like buying movie tickets to an R movie thru fandango? (never done that.)