Thanks, Jeri.

I had already tried using that search box, but when I typed in a name, e.g., Hank Williams, I got listings of all sorts of articles that mentioned Hank Williams.
Now I've tried clicking on the ACE/Repertory box. In that search box, I clicked on "Writers" and typed in "Hank Williams" and got listings for 3 other people but not him. Surely that doesn't mean the songs Hank wrote are not ASCAP protected, does it?

Here's what the site says about the ACE database:
"What is ACE?
ACE is a searchable database that contains information on compositions in the ASCAP repertory that have appeared in ASCAP's domestic performance surveys, including foreign compositions licensed by ASCAP for public performance in the United States, as well as most works registered with ASCAP since January 1991, whether surveyed or unsurveyed. ACE may also be used to determine whether a particular composer, songwriter or music publisher is a member of ASCAP.


Please note the following with respect to Writer information:
The ACE Database contains the names of ASCAP writer members and the names of their co-writers who are either affiliated with other performing rights organizations, or not affiliated with any other organization.
ASCAP writer members' names may be accessed directly on ACE by searching under the writers' names. The names of writers affiliated with other U.S. performing rights organizations cannot be accessed directly using ACE and searching under those writers' names.
When you click on the title of a song, the names of ASCAP writers, and writers affiliated with foreign performing rights organizations whose works are licensed through ASCAP for performances in the United States, appear with a "magnifying glass" after their names; the names of co-writers affiliated with other U.S. performing rights organizations, or not affiliated with any other organization, have no "magnifying glass" after their names.
As noted above, the ACE Database contains the titles of works written and published by members and affiliates of foreign performing rights organizations and licensed by ASCAP for performances in the United States under agreements between ASCAP and more than 90 foreign societies. The names of the writers of works with such titles also appear with a "magnifying glass" after their names.
Occasionally, members resign from ASCAP and ASCAP continues to license performances of the resigned members' works. These resigned members' works will be listed in the ACE Database but the resigned members' names will not have a "magnifying glass" after their names."

It's a help, but it's not really clear.