How to Register a CAPCOM ID Account
Linking with a Platform Account
If you register your CAPCOM ID-compatible game data with your CAPCOM ID, you will need to link it with an account on the platform you want to play on.
Create a CAPCOM ID
Click 'Sign Up' on the CAPCOM ID portal site.
Note: A video guide on how to register a CAPCOM ID is also available.
Link Your Desired Platform's Account
To play a CAPCOM ID-compatible game, you will need to link your CAPCOM ID with your desired platform's account.
You can do so via the CAPCOM ID portal site.
See here for more on how to link accounts. Additionally, a video guide is also available.