There is nothing in ISU regulations, that all skaters via their respective skating federations agreed to, that requires judges to take into consideration historical records in their scoring. They judge a specific performance on the day they were assigned to judge. That's all.
Oh really? If judges are just objectively scoring each event individually, then why was there such outcry about the judges holding back points on Dennis Ten in Worlds 2013 due to his more "junior" status? Why do people also say that skaters need to attend more Grand Prix events to build up their credibility and standing with the judges?