Apple Music
The Apple artist ID is composed of numbers only, like this: 1436545320
It is numerical portion of the URL you see when viewing an artist’s page in Apple Music.
You can get the URL and in a couple of ways:
In Apple Music in a Web page
Search and find the artist https://music.apple.com/gb/search
Go to the page. In the URL copy the last section of numbers only—highlighted in the example below.
https://music.apple.com/gb/artist/new-hormones/1436545320
From the Apple Music App
Tap or click the three horizontal dots in the artist’s page and choose “Share Artist.” You’ll get a URL n ou clipboard. Copy only the numeric part.
https://music.apple.com/se/artist/new-hormones/1436545320?l=en-GB
Once you find it, you’ll want to make sure it is added to the artist profile in Labelcaster.