By going through their information brochure of COEP, I did not find any information about admission by JEE Mains score. You have to go in person with your HS marksheet and all other required documents like Adhaar card etc. and can get your seat based on the eligibility criteria.

For information about the documents to be taken at the time of admission, please go through the link:

http://www.coep.org.in/sites/default/files/B%20Tech%2017-18%20Reporting%20guidelines_240717-01_1.pdf