<p>It's not necessary so is not being updated anymore. Using a bootstrap torrent is slower than downloading from the network using Bitcoin Core 0.10.0 or above due to improvements in the block downloading method. </p>

CC BY-SA 3.0
2015-06-12T13:38:27.787Z
Thank you, but I need use 0.9.x for now, because my program is not test for 0.10.x yet.
ZhouQi
CC BY-SA 3.0
2015-06-12T09:53:35.843Z
2015-11-13T06:47:55.403Z
2015-11-13T06:47:55.403Z
Claris
<p>Here is a thread where someone is providing updated <code>bootstrap.dat</code> downloads on BitcoinTalk:</p>

<p><a href="https://bitcointalk.org/index.php?topic=1310261.msg13412290#msg13412290" rel="nofollow noreferrer">https://bitcointalk.org/index.php?topic=1310261.msg13412290#msg13412290</a></p>

CC BY-SA 3.0
2016-01-01T04:22:58.670Z
2017-10-10T14:28:41.277Z
2017-10-10T14:28:41.277Z
hash tables
<p>I see it here:
<a href="https://bitcoin.org/bin/block-chain/" rel="nofollow noreferrer">https://bitcoin.org/bin/block-chain/</a></p>

<p>Maybe it was removed but it's back again?</p>

CC BY-SA 3.0
2017-08-04T01:50:39.857Z
2017-08-04T01:50:39.857Z
Kane
<p>As user <a href="https://bitcoin.stackexchange.com/users/24925/bitcoin">Bitcoin</a> has already pointed out, using a bootstrap.dat is no longer recommended—you can see the release notes for the new <a href="https://bitcoin.org/en/release/v0.10.0#faster-synchronization" rel="noreferrer">faster-synchronization feature here</a>.</p>

<p>As a result, the bootstrap.dat torrent links were removed from bitcoin.org after a <a href="https://github.com/bitcoin/bitcoin.org/issues/846" rel="noreferrer">short discussion</a>.</p>

<p>The bootstrap.dat file is still <a href="https://bitcointalk.org/index.php?topic=145386.0" rel="noreferrer">available here</a> on the bitcointalk.org forum, and jgarzik has indicated that he will continue to occasionally <a href="https://bitcointalk.org/index.php?topic=145386.msg11235170#msg11235170" rel="noreferrer">update it</a> "for academic research and development purposes."</p>

<p>Another alternative is the version which has been maintained by <a href="https://bitcoinarmory.com/about-bitcoin-security/" rel="noreferrer">Armory</a> Technologies, <a href="https://s3.amazonaws.com/bitcoinarmory-media/bootstrap.dat.torrent" rel="noreferrer">available here</a>. At the time of this writing, it is more up-to-date than jgarzik's bootstrap.dat, however it's not clear if it will receive any future updates.</p>

CC BY-SA 3.0
2015-06-12T13:38:01.360Z
To whomever downvoted my answer: can you please explain why this is incorrect and/or how it can be improved?
Christopher Gurnee
CC BY-SA 3.0
2015-06-12T13:47:25.900Z
I think yours is an exemplary answer. It treats all aspects of the question, i.e. why the `bootstrap.dat` its no longer listed on bitcoin.org, where the bootstrap still can be found andwhat alternative approaches exist. Meanwhile, it is well-written and commendably sourced. Have an upvote.
Murch
CC BY-SA 3.0
2015-06-12T13:52:48.460Z
@Murch Much obliged; regardless I'm always open to constructive criticism and to fixing any mistakes I make.
Christopher Gurnee
CC BY-SA 3.0
2015-06-12T13:53:23.073Z
Your answer is what I want to know, thank you!
ZhouQi
CC BY-SA 3.0
2015-06-12T13:55:16.627Z
@ChristopherGurnee: Would it be possible to download the Blockchain with BitcoinCore 0.10.x and use it with 0.9.x?
Murch
CC BY-SA 3.0
2015-06-12T13:59:57.120Z
@Murch Afraid not—headers-first broke backwards compatibility of the block files and LevelDB databases (noted [here in the release notes](https://bitcoin.org/en/release/v0.10.0#downgrading-warning)).
Christopher Gurnee
CC BY-SA 3.0
2015-06-12T14:02:31.357Z
@ChristopherGurnee: What I meant was, I see the downvote, but I don't see an (obvious) reason for it.
Murch
CC BY-SA 3.0
2015-06-12T14:04:21.580Z
@Murch Me neither ;)  I was just leaving open some benefit of the doubt.
Christopher Gurnee
CC BY-SA 3.0
2015-06-12T11:57:23.000Z
2015-06-12T11:57:23.000Z
2017-04-13T12:47:36.647Z
Christopher Gurnee
<p>I could download a <code>bootstrap.dat.torrent</code> from  <a href="https://bitcoin.org/bin/blockchain/bootstrap.dat.torrent">bitcoin.org</a> before, but it is no longer available. Does bitcoin.org still maintain it?</p>

<p>Is there another source for downloading a <code>bootstrap.dat</code>? I am stuck with a 0.9.x version of BitcoinCore for testing purposes, and the <code>bootstrap.dat</code> would improve synchronization for me.</p>

CC BY-SA 3.0
2015-06-12T13:40:42.833Z
possible duplicate: [Can I download the whole block chain from somewhere?](http://bitcoin.stackexchange.com/q/799/5406)
Murch
CC BY-SA 3.0
2015-06-12T13:52:02.883Z
I know bootstrap.dat, it just because bitcoin.org remove the link of bootstrap.dat.torrent.
ZhouQi
CC BY-SA 3.0
2015-06-12T13:54:36.557Z
Sorry, if I changed the intent of your question. Please feel free to rollback my changes or further edit your post to better align it with your intent.
Murch
<bootstrap.dat><bitcoin.org>
What happened to the bootstrap.dat provided by bitcoin.org?
ZhouQi
# What happened to the bootstrap.dat provided by bitcoin.org?

(Asked by: username_0 on 2015-06-12)

I could download a `bootstrap.dat.torrent` from [bitcoin.org](https://bitcoin.org/bin/blockchain/bootstrap.dat.torrent) before, but it is no longer available. Does bitcoin.org still maintain it?

Is there another source for downloading a `bootstrap.dat`? I am stuck with a 0.9.x version of BitcoinCore for testing purposes, and the `bootstrap.dat` would improve synchronization for me.

**Tags:** bootstrap.dat, bitcoin.org

> **Comments:**
> **username_1**: possible duplicate: [Can I download the whole block chain from somewhere?](http://bitcoin.stackexchange.com/q/799/5406)  
> **username_0**: I know bootstrap.dat, it just because bitcoin.org remove the link of bootstrap.dat.torrent.  
> **username_1**: Sorry, if I changed the intent of your question. Please feel free to rollback my changes or further edit your post to better align it with your intent.  

---

## 4 answers

### Answer by username_5 on 2015-06-12. Score: 17 | Accepted answer

As user [Bitcoin](https://bitcoin.stackexchange.com/users/24925/bitcoin) has already pointed out, using a bootstrap.dat is no longer recommended—you can see the release notes for the new [faster-synchronization feature here](https://bitcoin.org/en/release/v0.10.0#faster-synchronization).

As a result, the bootstrap.dat torrent links were removed from bitcoin.org after a [short discussion](https://github.com/bitcoin/bitcoin.org/issues/846).

The bootstrap.dat file is still [available here](https://bitcointalk.org/index.php?topic=145386.0) on the bitcointalk.org forum, and jgarzik has indicated that he will continue to occasionally [update it](https://bitcointalk.org/index.php?topic=145386.msg11235170#msg11235170) "for academic research and development purposes."

Another alternative is the version which has been maintained by [Armory](https://bitcoinarmory.com/about-bitcoin-security/) Technologies, [available here](https://s3.amazonaws.com/bitcoinarmory-media/bootstrap.dat.torrent). At the time of this writing, it is more up-to-date than jgarzik's bootstrap.dat, however it's not clear if it will receive any future updates.

> **Comments:**
> **username_5**: To whomever downvoted my answer: can you please explain why this is incorrect and/or how it can be improved?  
> **username_1**: I think yours is an exemplary answer. It treats all aspects of the question, i.e. why the `bootstrap.dat` its no longer listed on bitcoin.org, where the bootstrap still can be found andwhat alternative approaches exist. Meanwhile, it is well-written and commendably sourced. Have an upvote.  
> **username_5**: @username_1 Much obliged; regardless I'm always open to constructive criticism and to fixing any mistakes I make.  
> **username_0**: Your answer is what I want to know, thank you!  
> **username_1**: @ChristopherGurnee: Would it be possible to download the Blockchain with BitcoinCore 0.10.x and use it with 0.9.x?  
> **username_5**: @username_1 Afraid not—headers-first broke backwards compatibility of the block files and LevelDB databases (noted [here in the release notes](https://bitcoin.org/en/release/v0.10.0#downgrading-warning)).  
> **username_1**: @ChristopherGurnee: What I meant was, I see the downvote, but I don't see an (obvious) reason for it.  
> **username_5**: @username_1 Me neither ;)  I was just leaving open some benefit of the doubt.  

---

### Answer by username_2 on 2015-06-12. Score: 2

It's not necessary so is not being updated anymore. Using a bootstrap torrent is slower than downloading from the network using Bitcoin Core 0.10.0 or above due to improvements in the block downloading method.

> **Comments:**
> **username_0**: Thank you, but I need use 0.9.x for now, because my program is not test for 0.10.x yet.  

---

### Answer by username_3 on 2016-01-01. Score: 1

Here is a thread where someone is providing updated `bootstrap.dat` downloads on BitcoinTalk:

<https://bitcointalk.org/index.php?topic=1310261.msg13412290#msg13412290>


---

### Answer by username_4 on 2017-08-04. Score: 0

I see it here:
<https://bitcoin.org/bin/block-chain/>

Maybe it was removed but it's back again?


---

