# What is Blockchain Technology Blockchain is **a ledger system that records information in a way** that makes it difficult or impossible to change, hack, or cheat the system. Blockchain transactions are duplicated and distributed across the entire network of computer systems.\ \ Each block in the chain contains a number of transactions, and every time a new transaction occurs on the blockchain, a record of that transaction is added to every participant's ledger.\ \ Blockchain transactions are public and available for view to anyone in any part of the world with an internet connection. Transactions that have occurred years back can be easily viewed on the blockchain provided the transaction hash is available.\ \ For Example, A Bitcoin Block contains information about the Sender, Receiver, and number of bitcoins to be transferred with timestamps. {% embed url="" %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://cryptokenzyy.gitbook.io/crypto_nft_guide/cryptocurrency/what-is-blockchain-technology.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.