The tracking number to be used in https://ociservices.gov.in/welcome is the one you found in OCI application form (printed vertically as "File Ref No: CANTxxxxxx" , also found under bar-code in a smaller font size ).Thanks, I also got all 3 but nothing by email. First one was on application which I have downloaded after completing the online one. Other two are on BLS receipts. I still can not track my application using CANTxxxxxxxxx on below website.
https://ociservices.gov.in/welcome
Are you able to track it on this website? I applied last Thursday so its more than a week.
The tracking information will be available from this site - https://ociservices.gov.in/welcome only after you get the OCI acknowledgement.