How does the timestamping work: the code of hash
But what is it exactly that is being recorded? In the case of a document, notarising means ensuring that what is recorded and shared is certain and unalterable, allowing the interlocutor (natural person, company or organization) to verify its authenticity at any time.
Due to file size and cost, to be saved on Blockchain however, it is not the whole document, but a 256-bit cryptographic sequence made up of letters and numbers called a function of hash, which represents the document in a unique and unmistakable way.
This means that if even a single comma of the document were to be changed, the hash would be different, immediately unmasking the attempted fraud.