I just want to know if I may came to Idea that accidentally crosses someones else work and I didnt know that I accidentlly break the law because I didn't even know about that work.
You are still liable for infringement of the intellectual property. Ignorance isn't protection from the law.
Chances are you'll get a cease-and-desist or some other form of contact from the IP holder of a property you have infringed upon (accidentally or otherwise) before they actually take you to court. At that point you can address the violation (removing the offending aspects of your project or cancelling your project), try to negotiate a deal, or ignore them and continue the violation. But you've been made aware of your violation so continuing to do so puts you right back in the same position as if you knew about it beforehand. In fact it may make it worse.