How is it that streaming services have bad data to begin with? They are literally the source for the digital releases. If their information is bad from the start how we even know what to trust. Especially with niche artists it’s even harder to fact check if said person is credited correctly cause these artists won’t always state who worked on their music especially if they don’t have a strong online presence.
So the only option is if you don’t know, don’t add and just leave out someone’s potential credit from a recording cause it’s better than mismatching it with someone else