Just to clarify, a COPR is just that. A confirmation of permanent residency. It is a document that gives you the right to enter Canada, which can expire. Your process is not complete until you have landed and been officially entered into the Canadian system as a LANDED immigrant. Remember, as an Outland applicant, you cannot apply for your social insurance number, health card, etc until you have completed the landing process and been officially entered into the system. (Which initiates the sending of your PR card, as well.)
At any point BEFORE you’ve landed a COPR can be cancelled, so in theory a spouse should have the ability to cancel if they approach IRCC with any concerns, which is why it’s important to find out if this can happen. I haven’t been able to find a solid answer on this.
But general rule of thumb:
You are not ‘safe’ until you land.