Can you see a worlds creator in the world file?

The players that have opened the world are stored in the playerdata folder of the world. There is a file for each player named with the player UUID: e.g. 93b459be-ce4f-4700-b457-c1aa91b3b687.dat. You can use a tool like https://mcuuid.net to convert that to a player name.

If you don't want your name to be assigned to a world just delete this file before distributing the save.

If you want to know who created a world you can use the above procedure but note that it is really easy to forge so it is not like a signature.