I’ve seen http://roaringjelly.org/ listed as the official site for Roaring Jelly - MusicBrainz in a few places, but it currently redirects to https://trillian.mit.edu/~jc/rj/index.cgi which other places list as the official site. Style / Relationships / URLs - MusicBrainz says “URLs which are simple and unlikely to change are preferred” so I picked http://roaringjelly.org/ even though it’s just a redirect to the other one. Is that right?
(And yes, I know the artist discography is empty, I just added it to help disambiguate the multiple groups with the same name.)