“No matter what data you enter your always going to get exactly the same hash length”— Anders Brownworth, youtube.com
“Blockchains, by design and definition, defines a specific type of database… they are a write once read only database. What that means is, they are designed to be only ever created, and not edited or deleted.”— Joseph Pham, quora.com
“Blockchains provide a global append-only log that is publicly writeable. Writes to the global log, called transactions, are organized as blocks and each block packages multiple transactions into a single atomic write.”— Muneeb Ali, Jude Nelson, Ryan Shea, Michael J. Freedman, blockstack.org