What Is ZenStamp?
ZenStamp provides proof of existence and timestamping for documents utilizing the Bitcoin blockchain.
How Does ZenStamp Work?
For a document to be certified, ZenStamp creates a digital fingerprint (a SHA256 hash) and permanently save it as part of a transaction record on the Bitcoin blcokchain. The timestamp of the Bitcoin transaction becomes a timestamp for the document, which can prove the existence of the document at the transaction time.