There is hardly any information available about the project over internet. Do check which all banks are providing loan for this project and is it a BBMP approved project?
CC is received by builder after the IOD/IOA conditions are fulfilled. CC authorizes the builder to commence excavation and foundation work.
Occupancy certificate is obtained by the builder at the final stage. As the project is under construction, you will get OC only after the project is completed.
These documents you have to check with the builder while buying a property from them.