Why in this case maker of decoder should go to jail and not creator of google logo? To really make it difficult - let's assume both image and decoder was made at the same time.
If both were provably independently created at the same time, you would probably instead be having an uproar among scientists about the probability for such an event happening. It may still cause issues because the probability of such an event is so small, that the probability of the proof of their being independently created being wrong is the far more likely event.