That time I propose statistical services not as individual freelancer but as team from 4-5 qualified professionals in statistical analysis based in university. We could do number of statistical tests on quality of single output, series of data, possible covariation or nonlinear dependance discovery. May be some test if generated sequences could be predicted as sequence of clustered gaussians (or other type of distribution) (i.e. test is similar to digital WEB-fingerprint of target discovery for encrypted traffic), may be some others. We need know little more about type of source and what kind of quality indicators would you look for (max non-predictive sequence per fixed time, m.b. other?).