A lot can depend on what country you're in. It sounds like you are in the US, where the 75 years was the rule way back in the 20th Century. For a primer on US copyright and fair use, Stanford has a useful site.
The piece in question might possibly be PD if the 1929 copyright wasn't renewed, so you could start a search of IMSLP's scans here.

McLaughlin & Reilly sold their stock and maybe their rights to the Summy Birchard (sp?) corporation which itself went out business, but at least for a while, there was still a Summy Birchard entity in Canada.

This is obviously not an answer to your question, but just suggests how confusing the matter can be.

Anything written before 1923 is PD in the United States.

Except Happy Birthday.

FWIW, Weiss doesn't come up on WorldCat at all, and Reilly doesn't come up in connection with a Jubilate. So you have a pretty unusual item here.

Adam

Except that HPTY is one of the oddest of ducks: the erstwhile copyright holder bases claim in part on the change of words in 1924 (which is after 1922) and has gotten away with it by a commons problem (no one was, until 2013, willing to take on the expense of disputing the claim - now there's a class action to dispute it).

I published an arrangement of Happy Birthday on Youtube years ago, and they haven't said a hoot.
https://www.youtube.com/watch?v=UxCroGndnxY
And they have called me out on background music in one of my videos, so I know they do take action when anything is out of order. I suspect the whole copyright issue on HB is baloney.

Marilyn Monroe may have paid a heavier fee for her rendition.

And as we know, publishers never make claims that exceed what they really own. :-)

A work published in 1929 would need to have its copyright renewed in its 28th year, in 1956 or 1957. Can they confirm that the renewal was filed?

While originally copyright in 1929, the copyright for Jubilate Deo by Alphonse J. Weiss is not recorded as having been renewed in 1957 in either of the two volumes of the U.S. Catalogue of Copyright Entries 1957 Music (which includes copyright renewals). Therefore, it is safe to assume the work is now Public Domain.

Charles, do you know if there is a how-to page about that subject anywhere on-line?

The top level page for U.S. copyright searches is U.S. Copyright – Search Copyright Records.

Records are online for copyright registrations since January 1, 1978, with links in the left "Online Records" pane on the webpage for: (a) information About the Catalog and (b) a link to Search the Catalog.

Information for finding records prior to January 1, 1978 is on the right "Other Services" pane on the webpage, including: (a) a brochure on how to Find find records prior to January 1, 1978; (b) a link to Search the Catalog of Copyright Entries; and (c) a Tutorial for the CCE.

Because of the somewhat different way things were recorded (in books) prior to 1978 nearly all of which (especially for music) have been scanned and made available online, it takes some work, but (after trial and error), I find that it is best for me to follow the link for All items (most recently added first) – and from this page plow through the 14 pages of links-with-description until I find the year and subject I'm looking for, typically appearing as something like "Catalog of Copyright Entries, 1929 Music For the Year 1929 New Series..." (currently found on p.5 of the list of links), or "Catalog of Copyright Entries 1957 Music Jan-June..." and "Catalog of Copyright Entries 1957 Music July-Dec..." (both currently found on p.9 of the list of links). In these last two books, the copyright renewals for the periods are in a separate section, so you have to consult the tables of contents. In some years, copyright renewals are in separate volumes.

[Added note: Richard Mix provides a link, reproduced here, for Catalog of Copyright Entries – Music at IMSLP that saves the necessity of searching through the 14 pages of links at the U.S. Copyright archive.]

As far as I know, the copyright renewals were (quite logically) only recorded for the year of their effective date, which is 28 years after the original copyright. In fact, I strongly suspect that it was not possible to renew a copyright prior to the 28th year after the original. As an analogy: my driver's license is issued for 10 years, but I am not allowed to renew it after, say, 8 or 9 years since it was issued. You can imagine why.

This information about and my experience with the CCE have come through my rôle as president of CPDL, manager of its ChoralWiki website, and a member of its Copyright Issues workgroup. At CPDL, we take copyright issues very seriously.

There is no such thing as "International Copyright" because copyright is granted (secured) nationally. International agreements may effect fair use and licensing. But when copyright laws change in the EU and CA, the changes are retroactive. Thus, since there is no current need to secure international copyright for U.S. publications, this phrase "International Copyright Secured" is essentially meaningless.

IF the copyright statement says "International Copyright Secured", then you are able to make use of any per-copy license arrangements from your source, if provided, and that you can pay for copyright print (per copy) licenses in any country.

Those old "----- Copyright Secured" statements once had meaning, mostly that the copyright had been duly registered in the country of origin. But current international agreements, together with the fact that a work is copyright once it is created, with or without a copyright statement attached thereto, have rendered them essentially void. "International Copyright Secured" was not a "blanket" change by publishers, but refers to registration in one country (or more) with inter-country licensing provisions as I described above.