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The SourceForge project page for Bitcoin provides a blockchain download at http://sourceforge.net/projects/bitcoin/files/Bitcoin/blockchain/ but this file is old/dated.

How and where can I download an up to date copy of the Bitcoin block chain?

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I found this eu2.bitcoincharts.com/blockchain but it isn't dated (silly) – Colonel Panic Sep 28 '13 at 19:53
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@ColonelPanic that link is broken – puk Dec 5 '13 at 6:45
up vote 11 down vote accepted
+50

Since v0.10, the parallel block download in Bitcoin Core is often comparable in speed to torrent downloading, does not require temporary double storage, and validates while downloading instead of sequentially.

Original answer:

Please use the bootstrap.dat torrent download. It is more frequently updated and much safer to use.

You can find the .torrent download at http://sourceforge.net/projects/bitcoin/files/Bitcoin/blockchain/bootstrap.dat.torrent/download

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Could you elaborate on why it's safer? – Nick ODell Jun 24 '13 at 23:41
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Because it verifies the blocks on import, instead of trusting someone to give you a pre-validated pre-indexed database. – Pieter Wuille Jun 25 '13 at 0:11
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Ah, I did not realize that the .zip files contained the raw blk*.dat files. Thanks. – Nick ODell Jun 25 '13 at 0:16
    
My service provider blocks torrent downloads. So this is not a good solution for me. Any other sites? – Sydwell Jun 29 '13 at 6:56

You can download the complete blockchain at https://flo.sh/bitcoin-qt-bootstrap-dat/

If you follow the steps described the initial startup of Bitcoin-Qt should work significally faster :)

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It's not meaningfully faster post v0.10. – Nick ODell Aug 7 '15 at 1:44
    
Probably slower actually, given the double handling of the block data. – Bitcoin Aug 7 '15 at 18:00

Here you go I have recently uploaded the bitcoin blockchain to sourceforge.

Blockchain & Chainstate Date: 29th October 2013

Download Link: https://sourceforge.net/projects/bitcoinblockchain/files/29-10-2013/ Download Size: 9GB (Compressed) - 13GB (Decompressed)

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What do you think about using btsync to keep a up to date bootstrap.dat file labs.bittorrent.com/experiments/sync.html – Jonas Oestman Oct 31 '13 at 16:39
    
Thank you. When download completes, can I rsync it with my ~/.bitcoin directory or is it like this sourceforge link which is rather tricky to decipher sourceforge.net/projects/bitcoin/files/Bitcoin/blockchain – puk Dec 5 '13 at 6:50

You can "Download the latest snapshot from our high-speed CDN" on http://bitcoin.network but it's not free. It seems to be always up-to-date.

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http://en.blockchaindownload.nl/ is a good way to download the full blockchains of bitcoin and litecoin. The site is new so i expect more improvements in the future. They offer free torrent downloads uploaded 24/7 by 3 servers so bandwith is pretty good and the last upload at the time of writing this was a nicely compressed rar file!

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Please don't suggest solutions that require users to trust the operator of the site's honesty and security practices. If an incorrect record is added to the database download they offer, they may accept transactions out of nothing in an undetectable way. – Pieter Wuille Oct 13 '15 at 15:48
    
Well im the owner :P. The node is running without editing or something. Follow this linkhttps://bitnodes.21.co/nodes/81.169.224.162-8333/ to see the stats of the node providing the chain. Its an automated script that runs (normally) every friday and tuesday. The script contains the following steps: shut down node, use winrar to pack the chain, start node again,notifi the Ukrain webseed, make temp-torrent file, upload to filemail, make def torrent file. – rollo1996 Jun 28 at 21:30
    
If other things may be unclear, feel free to send a email to the mail noted on the website. – rollo1996 Jun 28 at 21:31

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