Well, it's so easy to find out the person whether he/she blocked you or not. You need to visit the chat box where you want to confirm the status and send him/her a message if you get a blue tick or double tick that means you are not blocked but if you don't get anything that means there is a possibility of the block.
This is the 1 trick to get the block status rest 7 are also available.
Read more about "How to check if someone blocked you on whatsapp"