Upload certificat to the blockchain
Can you create a web application very similar to Proof of Existence
Read more : https://www.pluralsight.com/guides/interesting-apis/proof-of-existence-in-the-blockchain-with-tierion-rethinkdb-and-pubnub
This has the following advantages:
It demonstrates data ownership without revealing actual data.
It checks for document integrity.
Using the blockchain, you can certify the existence of the document without the need of a central authority.
In practice, this decentralized proof can't be erased or modified by anyone.
It's anonymous, so others cannot identify you or your data.