<p>Found the solution, the command for the genesis block should be:</p>

<p><code>bx fetch-header -t 0</code></p>

<p><img src="https://s22.postimg.org/lu9dzycsx/bx_fetch_header2.png" alt="bx fetch-header genesis block"></p>

CC BY-SA 3.0
2016-02-29T15:00:29.427Z
2016-03-02T06:37:55.797Z
2017-03-10T09:42:45.833Z
mvanderbilt
<p>The bitcoin-explorer command <code>bx fetch-header -t 1</code> fetches the first Bitcoin block and shows the block header.<br>
If I check the "first" block header, where does "previous block hash" come from?</p>

<p><img src="https://s22.postimg.org/mfwiqkc41/bx_fetch_header.png" alt="bx fetch-header"></p>

<genesis-block><block-header>
Previous block hash on first Bitcoin block?
mvanderbilt
# Previous block hash on first Bitcoin block?

(Asked by: username_0 on 2016-02-29)

The bitcoin-explorer command `bx fetch-header -t 1` fetches the first Bitcoin block and shows the block header.  
If I check the "first" block header, where does "previous block hash" come from?

![bx fetch-header](https://s22.postimg.org/mfwiqkc41/bx_fetch_header.png)

**Tags:** genesis-block, block-header


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## 1 answers

### Answer by username_0 on 2016-02-29. Score: 1

Found the solution, the command for the genesis block should be:

`bx fetch-header -t 0`

![bx fetch-header genesis block](https://s22.postimg.org/lu9dzycsx/bx_fetch_header2.png)


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