How to verify revocation?

[Tadas Slotkus]

Hello,

I revoked my key and on the public key server it says:
"*** KEY REVOKED *** [not verified]"
Why does it say that revocation is not verified?

For example here:
http://keys.gnupg.net/pks/lookup?op=index&search=mrtadis

Thanks,
Tadas