Poster for Rin Tin Tin's star debut, Where the North Begins — 1923
Photo Credit: By Warner Bros-Lithograph by Otis Lithograph, Cleveland - siteposter, Public Domain, https://commons.wikimedia.org/w/index.php?curid=35330505

Lee Duncan owner of Rin Tin Tin —
Photo Credit: https://www.imdb.com/name/nm0242022/mediaviewer/rm966673920/?context=default

Rin Tin Tin with rescuers — Officers and men of the 135th Aero Squadron with their mascot Rin Tin Tin shortly after his rescue as a puppy in 1918
Photo Credit: By Air Service, United States Army - Air Service, United States Army, Public Domain, https://commons.wikimedia.org/w/index.php?curid=25890364

Rin Tin Tin —
Photo Credit: https://www.findagrave.com/memorial/874/rin-tin-tin

Warner Bros.–First National Studios, Burbank, c. 1928 —
Photo Credit: By WarnerMedia - Catalog of the Los Angeles Public Library, Public Domain, https://commons.wikimedia.org/w/index.php?curid=5543447

The Jazz Singer movie poster — 1927) featuring stars Eugenie Besserer and Al Jolson. Warner Bros. (original rights holder)
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=11710027

Harry Potter stars — Daniel Radcliffe, Emma Watson, and Rupert Grint at the world premiere of Harry Potter and the Deathly Hallows – Part 2 in Trafalgar Square, London on 7 July 2011
Photo Credit: By Ilona Higgins - Flickr: Colour version, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=15971793

logo for Bloomsbury Publishing —
Photo Credit: By Bloomsbury - Public Domain, https://commons.wikimedia.org/w/index.php?curid=16307501

Harry Potter and the Deathly Hallows cover —
Photo Credit: By Source, Fair use, https://en.wikipedia.org/w/index.php?curid=10325475

Harry Potter and the Half-Blood Prince cover —
Photo Credit: By Source (WP:NFCC#4), Fair use, https://en.wikipedia.org/w/index.php?curid=62211196

Harry Potter and the Order of the Phoenix cover —
Photo Credit: Fair use, https://en.wikipedia.org/w/index.php?curid=883456