Custom Column to remember converted books

I am curious if there may be a way for me to create a custom column for me to recall what I have converted.

I am wanting something like the following.

Say I have book.azw3 and I need to convert it book.epub

I would like a section in my custom metadata tab to have the following

Converted?: and then the checkboxes would be the formats (azw3, epub, etc.) and I could simply check the converted files

Is this possible to do?