I'm still confused... if court has accepted that he's "Satoshi Nakamoto" or only his claim over whitepaper. What does this claim really mean?
no the court didn't accept he is Satoshi Nakamoto. the scammer went to court and made a claim, the court set a date and asked the other party (cobra) to attend. they didn't attend so automatically the court ruled in favor of the scammer.
this only means that cobra wanted to protect their privacy and didn't want to give the scammer the satisfaction of doxing them.