Here's the piano intro tabbed out that serves as the riff.

E---------------------|
B---------------------|
G-5-10-10-9-9-7-7-5-5-|
D---------------------|
A-3--8--8-7-7-5-5-3-3-|
E---------------------|

C
My hope is built on nothing less
F                     G
Than Jesus' blood and righteousness
Am                   Am/G
I dare not trust the sweetest frame
F          G          C
But wholly trust is Jesus' name

Chorus
        F     Am    G
Christ alone, Cornerstone
C/E       F             Am       G
Weak made strong in the Savior's love
C/E         F     Am    G             C (Riff)
Through the storm He is Lord, Lord of all

C
When darkness seems to hide His face
F               G
I rest on His unchanging grace
Am                Am/G
In every high and stormy gale
F         G            C
My anchor holds within the veil
F         G            C
My anchor holds within the veil

Bridge
(Riff) C          Am          F  - G
          He is Lord, Lord of all

C
When He shall come with trumpet sound
F                G
Oh may I then in Him be found
Am                      Am/G
Dressed in His righteousness alone
F          G            C
Faultless, stand before the throne


Outro riff played against the chords of the chorus.
E--5-5-5-5-8-8-8-8-7-7-7-7-3-3-3-3-|
B----------------------------------|
G----------------------------------|
D----------------------------------|
A----------------------------------|
E----------------------------------|

E--5-5-5-5-8-8-8-8-7-7-7-7-12-12-10-10-|
B--------------------------------------|
G--------------------------------------|
D--------------------------------------|
A--------------------------------------|
E--------------------------------------|

E--5-5-5-5-8-8-8-8-7-7-7-7-7-7-7-7--| (back to Intro Riff)
B-----------------------------------|
G-----------------------------------|
D-----------------------------------|
A-----------------------------------|
E-----------------------------------|