So, for different albums that assign performers to different tracks only, I’ve been adding in their credits accordingly, and these are some of the ones I’ve done so far:
https://musicbrainz.org/release/432c4c03-0646-4d13-a6f2-ec44840720d0
https://musicbrainz.org/release/54b917e9-675f-4abc-8bfc-7be5ee662e3f
https://musicbrainz.org/release/d2e744ed-2b12-43c1-a8dd-35a143fc071b
https://musicbrainz.org/release/49eebbbb-66e2-4f85-8beb-a0ddbe805c2b
https://musicbrainz.org/release/c069a89f-336b-4431-981c-7d04605e9b54
https://musicbrainz.org/release/f9d0554d-8579-47df-a423-500cb88dbdda
https://musicbrainz.org/release/dcc46d39-7b56-4223-9dbf-29926577b77b
https://musicbrainz.org/release/edcb9329-b852-4805-a4f9-734215bd6ba6
https://musicbrainz.org/release/7d3a48fe-372c-46c3-9bca-f1454bc1b683
https://musicbrainz.org/release/6b19fd18-ca7e-409c-b9ae-c7c876c5e451
However, for the majority of releases out there that don’t divide their credits between each track, sometimes on the site I see said instrument/performer credits applied to the release itself, and other times I see them applied to every recording/track on the release regardless of who actually performed on what track.
It seems like an inconsistency, because shouldn’t per-track credits be for who specifically does something on a certain track? Otherwise which is the proper system on the site?