How can I verify successful replication of two domain controllers
Solution 1:
From a command prompt on each DC run "repadmin /showrepl". That will show you the status of replication from each DC's perspective.
Note that if your DNS zones are not AD integrated then they won't replicate with AD.
I've never heard of WINS being integrated with AD and as such it wouldn't replicate with AD either.
Solution 2:
Use dcdiag /v or some other option of the dcdiag command.
To make it easy to read I always do dcdiag /v > dcdiag.txt. Also check repadmin /showrepl to check replication between DCs