In “Denizens”, replace “Thereafter, it is the responsibility of each Hacker to keep their ownership of their Codenames both secret and provable, by whatever means they deem most secure.” with:-

The earliest md5 hash posted by a Codename in a GNDT comment is known as its Ident: if a Hacker demonstrates that a Codename’s Ident is identical to the Hash of a grammatical English sentence of no more than 20 words which includes the Hacker’s own Corp Name and no other Corp Names, then that Hacker is said to control that Codename.