When was the song “Proof” released by Coldplay?

The song Proof was released in 2005, on the album “Speed of Sound - Single”.

Coldplay

CHRISTOPHER ANTHONY JOHN MARTIN, GUY RUPERT BERRYMAN, JONATHAN MARK BUCKLAND, WILLIAM CHAMPION

So I waited for you
What wouldn't I do?
And I'm covered it's true
I'm covered in you

If I ever want proof
I find it in you
Yeah I honestly do
In you I find proof

Light, dark
Bright spark
Light, dark, and then light

So I waited all day
What wouldn't I say
And all the thing in you way
Things happen that way

And if I ever want proof
Then I find it in you
Yeah I honestly do
In you I find proof

Light, dark
Bright spark
Light, dark, and then light

Light, light, light... light...

When was the song “Proof” released by Coldplay?: The song Proof was released in 2005, on the album “Speed of Sound - Single”.
Who composed the song “Proof” by Coldplay?: The song “Proof” by Coldplay was composed by CHRISTOPHER ANTHONY JOHN MARTIN, GUY RUPERT BERRYMAN, JONATHAN MARK BUCKLAND, WILLIAM CHAMPION.