Assuming the timestamps are not forged, this only shows that the paper was uploaded November 2000. It might have been older. So we need a second source. Second

Assuming the timestamps are not forged, this only shows that the paper was uploaded November 2000. It might have been older. So we need a second source. Second source: The citations. The paper cites: "Mogul, [...] Pulse-per-second API for Unix-like operating systems [...] March 2000 [...]" So the paper is not older than November 2000 and not younger than March 2000.