Yes, we used Hypercerts to atest participation in the IRL activities of planting our pilot Agroforestry System, Redemption Hill. The goal is to link the volunteers that planted the initial seeds with the returns provided by the system in the following years. The contract address can be found here: https://optimistic.etherscan.io/address/0x822f17a9a5eecfd66dbaff7946a8071c265d1d07