What I know is that the Blockchain system is cryptographically protected so that the timestamp on the document cannot be damaged or backed up, it is very safe.
About BlockChain Technology is designed in modern technology systems, data encryption is very strong and can only be read and added, but cannot be changed, protected by cryptography encryption that cannot be edited,
BlockChain develops without depending on centralized servers.


Therefore BlockChain avoids the risk of downtime on the server. Centralistic blockchain systems become decentralized, so the blockchain will not die or disappear along with the technological sophistication of the world today.