You have setup Google Analytics…
Now you want to filter out internal traffic to your live site, because you get skewed results because of that…
You write an IP exclusion filter…
Now, the next obvious step is, you need to verify that your internal traffic is indeed getting excluded.
But strangely, there is no straightforward way!
1. Simple way is to try something very awkward that no one else would do… 
…and see if it’s reported the next day…but this is ad hoc…
OR,
a. Create a new profile for the same domain
b. Don’t do anything… …I mean, don’t add filter to it.
This way, you can compare both the profiles, and see if there are differences…
Not very clean…I agree…
