Honestly, is this really necessary?
Turrican himself added it to the database, so more than one person knows it exists.
CPU World has an entry in their database.
CPU has been dated, it doesn't really matter if it's an ES or not.
If you want to take ES into account, it may have even been earlier than 2000. Nobody knows. Point is, it's a valid CPU.
You guys can do what you want, we know who the real winner of the stage is.