Very interesting Helen ,we only play the chorus part the introduction I have never heard.When you get the tape you may be interested in the bit we play.Also the A part is slightly different but your version may be the correct one and ours not.
As for royalties I will not get excited ,I think even when we were featured on the radio over here the years royalties amounted to about £3.50 and it was taxable.I am just pleased you are enjoying the tune.
If you can push the royalties up to say £3.75 it may buy a nice bacon sandwich however.
Al