Has any legitimate sources confirmed that the usernames were also stolen along with these hashes? Or were only the hashes stolen? Could this just be an elabor

Has any legitimate sources confirmed that the usernames were also stolen along with these hashes? Or were only the hashes stolen? Could this just be an elaborate hoax where someone generated 6.5M SHA1 hashes and said that they hacked linkedin? Maybe someone shorted LNKD and then leaked this, hoping for a monetary gain?