Will VSS backups break logchain?

Our "hardware" dept has started some ASR replication on one of the servers where we run SQL Server. It seems that the method they use for this uses VSS, and I can see a lot of messages in the SQL Log about databases being backed up, and also the I/O frozen/resumed. It seems to do this about every hour. Will these backups taken by VSS break the log chain, or are they copy backups? Is there any way to see if they are copy backups? Is it possible to instruct the VSS to use copy backups? Any feedback appreciated.