# What is Blockchain ? #### **What is Blockchain?** **Blockchain** A blockchain is a shared digital ledger that records information across many computers in a network.\ Because the data is shared and verified by the network, it is transparent, secure, and difficult to alter. *** #### **What is a Block?** A **block** is a group of data that contains transaction details and the current state of the network.\ When you send **MOS Coin** to another user, the transaction is included in a block. Once confirmed, the block becomes a permanent part of the blockchain. Blocks are created continuously, forming an ordered history of all transactions on the ClubMOS Blockchain. *** #### **What is a Chain?** The **chain** refers to how blocks are connected.\ Each block contains a cryptographic reference to the block before it, forming a secure chain of data. If someone tries to change information in one block, all subsequent blocks would also need to be changed — which is prevented by the network’s consensus mechanism. This makes the ClubMOS Blockchain **tamper-resistant and trustworthy**. *** #### **What are Nodes?** **Nodes** are computers that participate in the ClubMOS network. They: * Store a copy of the blockchain * Verify transactions and blocks * Help maintain network security and reliability Every node agrees on the same version of the blockchain, ensuring that all users see the same data. *** #### **What is Consensus?** A **consensus mechanism** is how the network agrees on which transactions and blocks are valid. ClubMOS uses an **Enhanced Delegated Proof of Stake (DPoS)** consensus, where: * Validators are elected by the community * Blocks are produced quickly and efficiently * Security and decentralization are maintained Consensus ensures that the blockchain remains accurate and trustworthy. *** #### **What is the ClubMOS Virtual Machine (CVM)?** The **ClubMOS Virtual Machine (CVM)** is a global execution environment that runs smart contracts on the ClubMOS Blockchain. * It is **EVM-compatible**, meaning it supports Ethereum-style smart contracts * Any participant can deploy and execute smart contract code * Executing code updates the shared state of the blockchain CVM allows developers to build decentralized applications while users benefit from fast and low-cost execution. --- # 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://clubmos.gitbook.io/clubmos-docs/what-is-blockchain.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.