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-----------------------------------|