These are the chords use by Judy Jacobs as played by Lari Goss it can easily be lowered to C 

Intro:  A  B  C#  A  B  C# 

C#             F#m6/C#           F#m6         C# 
Behold, hanging before you is the sacrifice of God 
C#             F#m6/C#      F#m6            C#          C#  D#/C#  C# 
The Lamb pure and holy, creation stands in awe 
C#7/B                               F#m6/A 
Removing all that hinders for worship of our King 
       F#m6/G#       PUNCH              E  Amaj7 ---- 
As He cries, "It is Finished!" Heaven sings 


[Refrão]
 
C#                        F#m/C#    C# 
Let the veil down, Let the praise go up 
B                          C#/B      B 
Let the veil down, Let the praise go up 
F#m6/A           F#m6/G#                       C#         C#m/A  B  C# 
Let the veil down    we're the presence of the Lord 
 

We,come before You, With a sacrifice of praise 
I'm singing a song, Here in this holy place 
The Lamb of God, We raise 
For the One who stood reminding, us of all our sins 
He has been torn away, and now we can go in