Biography
There are at least two bands with the name 'Opus 5':
1) Opus 5 were a progressive jazz/rock fusion band from Quebec, Canada, active in the 1970s.
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2) Opus 5 is a jazz quintet featuring Seamus Blake, Alex Sipiagin, David Kikoski, Boris Koslov and Donald Edwards. They have so far release three albums, all on the Criss Cross Jazz label:
2011 - Introducing Opus 5
2012 - Pentasonic
2014 - Progression
Biography text from Last.fm, available under CC BY-SA.