Yes this is the correct bass part. I watched how Chris played it live and this is 
how he does it. Played with a pick.

Tableture Legend:
/:Slide Up
\:Slide Down
~:Let Ring

Intro: (Part 1 0:00) 


G-15-14-14-14-14-14-15-14-14-14-14-14-15-14-14-14 x2 |
D------------------------------------------------    |
A------------------------------------------------    |
D------------------------------------------------    |
                                                     | x2
G-15-12-12-12-12-12-15-12-12-12-12-12-15-12-12-12 x2 | 
D------------------------------------------------    |
A------------------------------------------------    |
D------------------------------------------------    |
Second time through play -15-12-12-12-12-12-12- instead of -15-12-12-12

(Slight Pause)

Intro: (Part 2 0:15)

G-------14----15----14----15-14- x2 |
D-------------------------------    |
A-12-12----12----12----12-------    |
D-------------------------------    |
                                    | x2
G-------12----12----12----12-12- x2 |
D-------------------------------    |
A-10-10----10----10----10-------    |
D-------------------------------    |

(Pause with drumbeat)

Pre-Verse: (0:31)

G-------------------- x3 |
D--------------------    |
A--------------------    |
D-0~00000~00~00~0~0~-    |
                         | x2
G--------------------    |
D--------------------    |
A--------------------    |
D-0~00000~0~888888---    |

Verse 1 : (0:47)

G---------------------------------------------------------- |
D---------------------------------------------------------- |
A-55555-55555-555-55555-555555-555-555-555\33333-33333-333- |
D---------------------------------------------------------- |
                                                            |
G---------------------------------------------------------- |
D---------------------------------------------------------- |
A-33333-33333-333/1010101010-1010101010-101010-1010101010-- |
D---------------------------------------------------------- |
10-10-10-10-10 not 1-0-1-0-1-0                              | x2
                                                            |
G---------------------------------------------------------- |
D---------------------------------------------------------- |
A-1010101010-101010-101010-101010/55555-55555-555-55555---- |
D---------------------------------------------------------- |
                                                            |
G---------------------------------------------------------- |
D---------------------------------------------------------- |
A-55555-5500----------------------------------------------- |
D---------------------------------------------------------- |

Second time through replace -5500- with -555-

Chorus: (1:22)

G----------------------------------------------------------------- |
D----------------------------------------------------------------- |
A-------------------------------------------------33333-33333-333- |
D-33333-33333-333-33333-33333-333-33333-33333-333----------------- |
                                                                   | x2
G----------------------------------------------------------------- |
D----------------------------------------------------------------- |
A-------------------------------------------------55555-55555-555- |
D-55555-55555-555-55555-55555-555-55555-55555-555----------------- |

Chorus Outro: (1:53)

G-------14----15----14----15-14-| x2
D-------------------------------|
A-12-12----12----12----12-------|
D-------------------------------|

G-------12----12----12----12-12-| x2
D-------------------------------|
A-10-10----10----10----10-------|
D-------------------------------|

G-------14----15----14----15-14-| x2
D-------------------------------|
A-12-12----12----12----12-------|
D-------------------------------|

G-------12----12----12----12-12-|
D-------------------------------|
A-10-10----10----10----10-------|
D-------------------------------|

-Pre Verse-

Verse 2: (2:22)

G---------------------------------------------------------|
D---------------------------------------------------------|
A-55555-55555-555-55555-55555-555-555-555\33333-33333-333-|
D---------------------------------------------------------|

G---------------------------------------------------------|
D---------------------------------------------------------|
A-33333-33333-333/1010101010-1010101010-101010-1010101010-|
D---------------------------------------------------------|

G---------------------------------------------------------|
D---------------------------------------------------------|
A-1010101010-101010-101010-101010\55555-55555-555-55555---|
D---------------------------------------------------------|

G---------------------------------------------------------|
D---------------------------------------------------------|
A-55555-555-----------------------------------------------|
D---------------------------------------------------------|

-Chorus-

Outro: (3:10)

-Play Intro Part 2-

(3:28)

G----|
D----|
A----|
D-0--|