On June 30th 2021, I, Ryder Ripps, sold CryptoPunk #3100 on Foundation for 2.189 ETH to 0x9e67D018488aD636B538e4158E9e7577F2ECac12
https://foundation.app/@ryder_ripps/cryptopunk-3100-52921
An explanation of that work can be found here, https://www.instagram.com/p/CQwdw5XLLwk/
A day after the sale the work was taken down from Foundation, a DMCA notice served.
This NFT signifies that event.