Except in the US after Congress and the Senate pass the bill a conference committee gets to make the two versions match so I believe the "vote" on the substanti

Except in the US after Congress and the Senate pass the bill a conference committee gets to make the two versions match so I believe the "vote" on the substantive motion couldn't occur until it's in conference. Also the votes for amendments may only be recorded as voice vote (not a roll call I believe) which means you wouldn't know who voted for what. Who offered the amendment should be public record.