Who's the artist on making-of tracks?

What would be the correct artist credit to use on behind-the-scene/making-of tracks?

Right now a few releases have the label (as an artist!) as the credit, which seems weird to me. Would [unknown] be better?

(I have not specified the exact release intentionally as I would love a generic answer.)

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I have only seen and added examples with the release artist set as making of track artist.