Does this also apply to sha256(a_copyrighted_work)? Note that retrieving any "useful information" about the original is believed to be similarly impossible fro

Does this also apply to sha256(a_copyrighted_work)? Note that retrieving any "useful information" about the original is believed to be similarly impossible from sha256(a_copyrighted_work) and encrypt_{sha_256(a_copyrighted_work)}(a_copyrighted_work).