If you ripped those CDs while contracted by these record labels, I don’t see how it is legal for you to keep the files after the job and call them yours.
You assume that once the job was done, he washed his hands of it and it was over.
I once digitized a large media collection for a company (not audio, though), and it regularly used me as a backup source of last resort for when the files failed/got lost/needed to be transferred in bulk to another company/whatever on their end.
I once digitized a large media collection for a company (not audio, though), and it regularly used me as a backup source of last resort for when the files failed/got lost/needed to be transferred in bulk to another company/whatever on their end.