You are now able to add contact properies for Opt-Ins and Opt-Outs in your HubSpot CRM.
1) Go to any contact under Contacts. In the left pane with all contact details, scroll down and select View All Properties.
2) In the Search bar, search for "Opt" and you'll see Opted In and Opted Out options come up.
3) Hover over the section row and select "Add to your view". Do this for both opt-in and opt-out options if you'd like.
4) Make sure to select Save at the bottom of the screen.
5) Now, when you look at a contact's profile, you'll see both properties which will automatically update depending on if/when your contact opts-in and opts-out.