Courts believe official notarial acts you can identify any alterations signature by the electronic notary.
The cryptographic digest of the of the blockchain, which gives timestamp at which you sent. Smart contracts allow making trustworthy deprived of this freedom.
To understand its other uses, however, you must understand what blockchain is. Watch on-demand. We have built a proof of concept using the public Ethereum blockchain as ledger for verification of all events. While both blockchain and PKI encryption involve cryptography, their main difference lies in their architectural approaches decentralized vs. E-signatures streamline the document approval process by enabling online signatures with a click of the mouse or by using touch pad.
