OK = OK to fly (Segment has no impediment that needs manual intervention, and is not used).
*Impediment could mean a schedule change needing passenger approval, or needing airline rebooking, or an un-ticketed segement (waitlist hasn't cleared etc).

To check if ticketed or not, you need to find the ticket number. You should have an email from ANA with this info.
However, the most painless way is to check at the Finnair website https://www.finnair.com/int/gb/bookings?
under "Manage booking". A 13 digit ticket number (205-xxx) should confirm the flight is indeed ticketed.