Canonicals are a really important concept in FHIR. If you don't know how they work, have a look here: What is a canonical?

You can automate canonical resolving by using the following URL:

https://simplifier.net/resolve?scope=&canonical=

There are two important parameters that you should provide:

• canonical: Canonical URL that you are trying to resolve.
• scope: Scope in which you want to resolve the canonical URL.