> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dune.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Bitcoin data

> Bitcoin is the first and most well-known blockchain.

<CardGroup cols={1}>
  <Card title="A full guide on all Bitcoin concepts" icon="map" href="https://web3datadegens.substack.com/p/how-to-analyze-bitcoin-data-with" />
</CardGroup>

Bitcoin uses a UTXO transaction model, and has a heavy focus on signatures and scripts for "locking" and "unlocking" tokens. It is also most well known for being tied to a 21 million token supply, and halvenings.

## Data Available

<CardGroup cols={2}>
  <Card title="Blocks" icon="cube" href="/data-catalog/bitcoin/blocks">
    Blocks are the base unit that all transactions fit into.
  </Card>

  <Card title="Transactions" icon="exchange-alt" href="/data-catalog/bitcoin/transactions">
    Transactions contain all spent inputs and created outputs from a UTXO transaction.
  </Card>

  <Card title="Outputs" icon="file-export" href="/data-catalog/bitcoin/outputs">
    Just the outputs, unnested.
  </Card>

  <Card title="Inputs" icon="file-import" href="/data-catalog/bitcoin/inputs">
    Just the inputs, unnested.
  </Card>
</CardGroup>