There is a list of bip44 identifiers for altcoins here.
It uses the term
registered coin types. My question is, is there anything in code for each coin that the bip44 number is derived from, or this is purely an arbitrary assignment from a 3rd party?
From reviewing code, bip44, and slip44, my conclusion is the latter: namely that one "registers" simply by sending an email to the author(s) of slip44, and they
hopefully assign a number.
If I am incorrect and there is code in bitcoin-core
or an altcoin derived from it that defines or uses the bip44 id, please point me towards that code.