There is no such thing as a "Journal Scan" that is a myth. There exists no functionality for the client to send Razor messages to the server (and even if this existed, Razor could just block it). The OSI staff can do a server side scan of all things that you said or that were said around you, but this only covers messages sent to the server. Since Razor messages are never sent to the server there is no way Razor could be detected using this method.
That said, I would like to point out that if such a thing existed I would gladly update Razor to circumvent it. I don't have a lot of qualms about breaking OSI's rules. Why? Because OSI has given UOAssist a free monopoly on the "legal" assistant market. UOAssist is approved "UOPro" software, but OSI since discontinued the UOPro program so it is not possible for Razor to become UOPro.
Currently, I do not know of any way in which OSI can detect players using the most recent version of Razor. I have not heard of anyone getting banned from OSI for using Razor in quite a while. (Though, people don't often tell me when they get banned, and they do not always know why... so that may or may not be a useful metric.)