Masthead shows no copyright mark, nor does the publishing notice. To confirm further, checked the Catalog of copyright entries and found no entries in periodicals for the Denton Record Chronicle or any variation of the name, and no entry in works of art for UPI Telephoto or any variation of the name.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
Uploaded a work by UPI Telephoto from [https://newspaperarchive.com/celebrity-clipping-may-09-1975-3226505/ "Course Views Country Music with Anthropological Eye"]. ''Denton Record-Chronicle''. Denton, Texas. May 9, 1975. p. 21 with UploadWizard
File usage
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