The phrase "immutable blockchain" means that once information or data is added to a blockchain, it cannot be changed or altered. It is like a digital record that cannot be modified, ensuring its reliability and trustworthiness. Full definition
Others charge that ETC is nothing more than a combination of immutable blockchain loyalists, ETH antagonists, and general market speculators — not the most flattering depiction. (investinblockchain.com)
Another advantage is the stories will be hard to wipe off the Internet, as often happens when a media firm goes bankrupt, because the article are hosted on an immutable blockchain. (fortune.com)
All of these websites read and write content to the Steem blockchain, which stores the content in an immutable blockchain ledger, and rewards users for their contributions with digital tokens called STEEM. (steemit.com)