Third-party copyrighted material (other than trademarks) present in the operator's content but owned by parties other than the operator. Categories include quotations and excerpts (text from books, articles, speeches), audio samples (music production sampling, sound effects), film/TV clips (documentary footage, criticism content), archival material (historical footage, period photographs), stock material (commercial stock photography, library music), performances (cover songs, sampled performances, archival performance footage), quoted dialogue and characters (fan fiction, parody, transformative works), datasets and structured material (licensed databases, academic datasets), and software and code (third-party libraries, open-source incorporation). Declared via CIP-Source-Material (v3.34). Distinct from operator-owned material handled by the standard rights bundle, and from third-party trademarks handled by CIP-Third-Party-Marks (v3.33).