| # | Title | Name | Region | Comment | Date |
|---|---|---|---|---|---|
| 1 | N/G | Ryan Spencer | USA | View | May 30, 2018 |
| 2 | Mr. | Brian Cox | USA | N/G | Oct 30, 2023 |
| 3 | Mr | david freeman | UK | View | Apr 28, 2024 |
- S/C/P - State, County or Province
- Dates displayed in the signature list are based on UTC/GMT
- Anonymous signatures signify people who have chosen not to display their names publicly
- A comment in gray indicates that the signer has hidden their comment from public view