Since you haven't actually submitted anything to IANA, you should probably use application/vnd.corn instead of application/corn, since having an unprefixed MIME type puts strict requirements on the type of standard being listed, or widespread use, neither of which seem to apply here.
The vnd. prefix is pretty loose and stands for "vendor," and is meant for cases like this: https://www.rfc-editor.org/rfc/rfc6838.html#section-3.2
Since you haven't actually submitted anything to IANA, you should probably use
application/vnd.corninstead ofapplication/corn, since having an unprefixed MIME type puts strict requirements on the type of standard being listed, or widespread use, neither of which seem to apply here.The
vnd.prefix is pretty loose and stands for "vendor," and is meant for cases like this: https://www.rfc-editor.org/rfc/rfc6838.html#section-3.2