Answer? A major label.
Turns out, while the music companies have been pushing to have file sharers thrown in debtor's prison, they've been quite happily releasing tracks they don't own. Getting on for a third of a million tracks:
The claims arise from a longstanding practice of the recording industry in Canada, described in the lawsuit as "exploit now, pay later if at all." It involves the use of works that are often included in compilation CDs (ie. the top dance tracks of 2009) or live recordings. The record labels create, press, distribute and sell the CDs, but do not obtain the necessary copyright licences.
There's now to be a class action lawsuit against the labels in Canada.
Quite right, too: it's like stealing, isn't it?