crack as proof of concept

I am working on new method to protect software and i need a hack as proof of concept for the company i want to sell the method to by hacking their software (with their ok). so if you have experience in hacking software then send me a PM and i will provide you with the software name and website. the hack will be for 2 versions a windows and a mac. this is not an illegal work we are a consulting company for IP security. this should be very simple work. thanks