Because this specific string does not appear in standard public databases or common search results, it is likely:
: Used by specific private forums or Usenet indexers to identify a particular file download. downloaddc5c1ad560af8de
: Part of a "Proper" release group's naming convention for a movie, game, or TV show episode that was re-released to fix a technical error in a previous version. Because this specific string does not appear in
The phrase appears to be a unique identifier, likely a hash or a specific database ID, often used in automated file sharing or "Proper" scene releases (quality-corrected versions of pirated media). downloaddc5c1ad560af8de