It's really hard to say, because it depends on the judge, and sometimes it depends on the state you're in (jurisdiction of suit, not where you live).
I should mention now that I am not an attorney, have never played one on TV, and I am not dispensing legal advice or counsel in any way (I just happen to have a fair amount of practical knowledge from experience and study).
If you are really concerned, you probably should consult an attorney. The only non-music biz/intellectual property attorney source that I would trust for solid, specific information would be Moses Avalon (I do not work for him or know him personally, but have had good experiences with his company). He is not a lawyer, but is the only non-attorney allowed to teach law students and those taking the bar exam in California regarding music/entertainment law. He has a website (
www.mosesavalon.com), and charges fairly reasonable rates for on-line or phone consultations. You could also call or try to get in-touch with some free help through the VLA (Volunteer Lawyers for the Arts). Or get with an attorney on your own, but I'd strongly suggest someone that really knows music business and copyright law, not just a general practitioner or johnny-contract attorney.
Seriously. If you are concerned, seek professional counsel (not here at FP or any other "musician's hang" site). If I'm the best you've got, you could be in trouble...
But DO educate yourself as best as possible on the music business and copyright law as it pertains to you. This Business of Music, The Songwriter's Market (not sure if they still put that out, but there are copies available out there that still have good info in them, I'm sure), and other books by Donald Passman and Kashif are great resources; if you're "not a reader," become one. You can also visit the Library of Congress Copyright website, and also the BMI, ASCAP, Harry Fox, and other similar websites for free. Get the info and get educated. It can only help your longevity in the music business in the long-run.
GJ