music.net.nz is a database of New Zealand music.

It's been around since 1999 and I keep expecting it to fall over, but (much like MB) it just keeps trucking on, and it is often the only site that has information on lesser known NZ artists.

• artists: https://www.muzic.net.nz/artists/123

Their release (this would map to release groups only) pages are less useful imo, but could also be whitelisted:

• release group: https://www.muzic.net.nz/artists/123/releases/123