I think this is right, but maybe use the spine if it has more info?
Regarding the MoS releases, I’d just point out that situations like these could be more easily resolved if we had different fields for pre-titles, main titles and subtitles. For example, the title Ministry of Sound: UK Garage: The Album: The Sound of 2000 could be split up into:
Ministry of Sound <−−−−−−−−− (pre-title)
UK Garage: The Album <−−−− (main title)
The Sound of 2000 <−−−−−−−− (subtitle)