While fans refer to the show as SDCC, the organizers themselves refer to the show simply as "Comic Con" or "Comic Con International" so IMHO the COA letter is a red flag when I see "San Diego Comic Con" . I can't make out the last name but try googling his name.
As far as the artwork itself, the lines look too thick to be McFarlane. There does not seem to be any variation in the weight of the signature either.
Somebody else can verify but in 2001, SDCC show dates were July 21 - 24. From the photo, the COA says July 27, 2001.
My 2 cents.