mine PR file with OWP was received on March 1,2018Yes, you are correct. Also, use your UCI and family name. Here's a guidance from another forum member, scroll down the page and you will see what they filled in to get it linked.
https://www.canadavisa.com/canada-immigration-discussion-board/threads/2018-spousal-sponsorship-in-land-applications-timeline-and-updates.536517/page-43#post-6855153
OWP file showing Feb 22 on cic.
Still no luck ?