Well, I would bet that someone could sue him for false filing a copyright. He can't prove he is Satoshi. End of story.
What about our big exchanges, whales, etc?
Besides, the software and the paper were released under the MIT license.
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From the U.S. Constitution to old newspapers, from the paintings of old masters to the national anthem, the public domain has been copyrighted... Copyfraud is the most outrageous type of overreaching in intellectual property law because it involves claims to a copyright where none at all exist.
Jason Mazzone[5]:25
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https://en.wikipedia.org/wiki/Copyfraud