I tryed to download this blockchain snapshot
http://sourceforge.net/projects/bitcoin/files/Bitcoin/blockchain/File bitcoin_blockchain_170000.zip
After unzip I see a listing:
blk0001.dat
blkindex.dat
README.txt
SHASUMS.asc
SHASUMS.asc contents:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
87960e3eaa7136d182d91ea3a6223c25d5810153 blk0001.dat
5e81a938566065f61ae827ecfaef0162fbf82f30 blkindex.dat
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (Darwin)
iQIcBAEBCgAGBQJPW2VRAAoJECnZ7msfxzDBr6MQALL+y7ZeGauE6Dq8nLbYOsEe
o2WzRbMMuL6r6jelptNIFqPQmLOpoPavtqZhHpw9E655n3EhOnm5lT9PTX9ocU58
sNC3KqwLiywsmXNn1umqcWDT3unp+VzRSJ8fNRIrsDEY6mHqq3QEjHSGaqCT1E3Y
kVwnaO8uA9kq2UC/6g3fuaZ0rXMVBeR8rD7h9DxzOgJnDE+8aEeDl+vR4t8RoWwH
Z52WKO8uKgsyYn+h+d7QLzZRc7lX066e14QkK7gPF5toe2uM3AmvZUYizENdP2rl
c6GmuILIDSBE78ibKdY+yhdXDE9yS2xwzjSLCOn5D2jt7nqQ2H7QqSBzj3qIsFLX
mmYJf+Mu/JKPl/Qd0zHwj+4n85xeVZST7DSBmMNGy+3LjtZctS3p1xSdXSsWAnsh
nOD16sOFhvjbiQLxRC4Ljje5+jCRuE2mEadtn6B71ThmMtFL5Wz3IR8iv+vshtOJ
EPjs40oIwHcykiPsO8ueIq2CkKXx72P3/r2SG+DRmi1TR8BGTFQhL0jP+TAPUOZr
jLmN1xPaLbjcJDhNKWJwOvt9o6o9UlkPEfltreXPhxuKz6eLymkto0pAUdNJmwEI
soByOR2N5V1riaayykV5P5EnwXnZAY9mV6JiW7kadL78bZ/IcEdsPzJqPy7fsbhW
oQOQkUofpGgqDIpzAur5
=q2Ad
-----END PGP SIGNATURE-----
Signature is correct and checksums okay, but they are SHA1 sums, not SHA512 like it written in file (Hash: SHA512)
sha512:
[bt@mail bitcoin_blockchain_170000]$ sha512sum blk0001.dat
1a2fe85e3f7d4e2e566aa73daee54e8a7bda657237ca477193f024136fe7311273f862f539dee2cce3650d35dcd732a8a9b6d98d1b3e22bda43b9b310e0b151b blk0001.dat
[bt@mail bitcoin_blockchain_170000]$ sha512sum blkindex.dat
91697d7b22ff4fd0470c021c1b68c3040cdac49d47bf3c47dfdb10f1fc60dd41f44fa74b9e65ab81a8da61ee8b8ffd99dd0fa6c73a43a3f215e59633cc83b8ce blkindex.dat
sha1:
[bt@mail bitcoin_blockchain_170000]$ sha1sum blkindex.dat
5e81a938566065f61ae827ecfaef0162fbf82f30 blkindex.dat
[bt@mail bitcoin_blockchain_170000]$ sha1sum blk0001.dat
87960e3eaa7136d182d91ea3a6223c25d5810153 blk0001.dat