Question juridique clé
Whether the appellant proved he created the disputed photograph and is its author under copyright law.
Solution extraite
The appellant did not prove authorship; the respondent was accepted as author under the statutory presumption.
Motifs extraits
The Federal Supreme Court found the appellant's challenges largely inadmissible or merely appellatory. The cantonal court's evidence assessment was not arbitrary, and the burden of proof for authorship was not discharged.