International Standard Name Identifier is new metadata to resolve name ambiguity for contributors to creative works. This number can define a person, like a writer, artist, performer, producer, etc., or it can define an organization, like publishers, studios, aggregators, etc.. It is part of the ISO global standards and ties into other metadata in the music industry, like ISRC, and other industries metadata, like ISBN etc. It is a cross-domain resource with direct contributions from over 40 sources.
The newest metadata standard for music is here apparently and it is RIN-M. Soundways has a free plugin that gets saved in your DAW when you are creating the tracks and you can add everyone's information and send it along. It is a cool idea on solving the issue with how recording credits are stored and transferred. You can download the plugin here.
I have it downloaded and it was pretty easy to use and get the hang of it. Hopefully, this will catch on and more info will be distributed with digital releases of music.