[1] https://en.wikipedia.org/wiki/MythBusters_(2006_season)#Pott...
TLDR: Too late to be included in the bi-millenium vault, a Smithsonian researcher discovers an audio recording accidentally inscribed on a c. 1280 pot by a pointy tool cutting a decorative spiral. After listening to the banal conversation recorded on the pot, the researcher wonders about the contents of the vault to be opened in a thousand years: “What makes you think we’ve done any better?”
EDIT: or (allegedly) the whole collection of everything he recorded (or at least what survived to today): https://www.youtube.com/watch?v=uRbIJc05QTA
EDIT 2: or some recordings as part of a writeup by the researchers: https://www.firstsounds.org/sounds/scott.php