Wiktionary
time code
alt. A numeric code generated at regular intervals by a timing system. n. A numeric code generated at regular intervals by a timing system.
Usage examples of "time code".
I sent: 'please disregard PREVIOUS MESSAGE EVERYTHING UNDER CONTROL ESSENTIAL YOU DO NOT ATTEMPT TO CONTACT ME FORTY EIGHT hours no time code', and took the liberty of adding your name.
Or perhaps the system used a one-time code for every badge, where the response changed according to a predetermined formula every time it was used.
By comparing the time code stamped on the digital traffic cam photo with the time code on the bank footage, they knew they had a match.
McCoy and bears a narrow voice print band with a digital time code read out.