Sentence examples for this is the proof from inspiring English sources

This is the proof that it works".

This is the proof of their involvement in drugs trade".

Then, this is the proof of the law of cosines.

They sent me a copy, and I said 'oh, this is the proof, is it?'.

This is the proof, the legacy of who we are as a family".

Afterwards, he said: "This is the proof and truth our two heroes have clearly demonstrated.

This is the "proof-of-work" scheme for allocating new Bitcoins.

"The Isis commander then showed them Henning's passport and said that this was the proof, [saying]: 'There is a secret chip inside.

This was the proof that Europe and America were growing further apart in automobiles, not closer.

This was the proof I needed, I was too hard to Love.

This is the the proof!!!