Log your time i/a/w 14 CFR, but be ready to explain and substantiate to an airline interviewer whether you were ultimately responsible as the PIC:

-Was Your name listed on the FAA Flight Plan as the PIC?
-Was Your name listed as the PIC on the aircraft log?
-Was Your name listed as PIC on the flight release (if applicable)?
-Are there other company documents which indicate the PIC
designation for each flight (trip sheets, payroll, etc)?

There is only (1) PIC designated for a given flight.