From what I have heard, several municipalities have attempted mandatory bicycle registration. Most of those attempts have failed. DC just abandoned it’s plan. Detroit is trying a new plan, ostensibly to combat theft.
Europeans don’t have to suffer under bike registration. I look on it as just another autodominionsist attempt to control the roads for themselves.
(I made up the word autodominionist to refer to people in cars who believe that roads are their exclusive domain and oppose any other use. We all know the type. A search of Google could find no other instances so if, by chance, the word catches on, I just want to document that it was heard here first.)