> For the complete documentation index, see [llms.txt](https://clubmos.gitbook.io/clubmos-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://clubmos.gitbook.io/clubmos-docs/what-is-blockchain.md).

# 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.