Proof of Existence & Proof of Authenticity
One of the use cases of Blockchain is so called Proof of Existence: create an unalterable date and time stamp for a specific object.
This means that you can prove that a certain information object – like an email, file, document, phone-call or video – existed at a certain point in time and that it is authentic (unchanged).
You do this by digitally ‘signing’ an object, with our ProofOfExistence API. The API creates a unique identifier for your object (or you could do this yourself).
The identifier gets then committed into the distributed Blockchain ledger. With this commit the transaction gets timestamped as well. Since every entry in the Blockchain is immutable, this means that you have proof that this specific object existed at a certain point in time.
Using the same API an object can be verified and validated. The API again creates a unique identifier and verifies this unique identifier against the Blockchain. If there is a match, the API returns a valid match as well as the original time-stamp. This serves as a Proof of Existence and Proof of Authenticity.