Publishers can collect royalties, usually on behalf of the songwriter(s), so Lovenote Pub may have done this ( past, now or future). There may also be a copyright (perhaps a master recording copyright, usually owned by the artist) and there's the composition which may be copyright protected usally by the songwriter or publisher.
Needless to say @Woodbutcher is right, with our 45's royalties or other payments are likely to amount to bugger all.