The Senate has a record of roll call votes, but they are broken out by vote, not by Senator. You can go here to see every roll call vote and then look to see whether or not Kerry voted “yea”,“nay”, or he wasn’t present:
If you go here you can search for all the bills that Kerry sponsored or co-sponsored:
Each of these pages is broken up by Congress (108th, 107th, etc.), so to get Kerry’s complete record you’ll have to do some searching, but it’s all there. You can also search the Congressional record for any speeches he made.