The Disaster Tax Relief Act of 2011, bill S.1456,

[Mass]

The joy of alphabetic order will appear when you click on the link. (this is probably not due to political bias as the Springfield Republican normally leans Democratic).

http://www.masslive.com/business-news/index.ssf/2011/08/senators_scott_brown_john_kerry_and_us_r.html

Interestingly, the Worcester Business Journal, probably not of Democratic leaning, does not list the lesser senator.

http://www.wbjournal.com/news49524.html

Here is Kerry's PR
http://kerry.senate.gov/press/release/?id=ee6bbc70-d5f8-42fa-821f-886909e0258f

And opencongress confirming that kerry is the sponsor

http://www.opencongress.org/bill/112-s1456/show