The same report-generation timestamp that's at the bottom of the page, but embedded within all the images at the bottom right corner. Keep the report-generation timestamp at the bottom of the page too. Sometimes there are browser refresh issues and old images haven't updated yet, needing a hard refresh or browser cache clear. Including the timestamp within the image wouldn't solve that problem but it would enable that problem to be spotted by viewer of page, so at least they know to hard-refresh by comparing to the report generation timestamp at the bottom of the page.
The same report-generation timestamp that's at the bottom of the page, but embedded within all the images at the bottom right corner. Keep the report-generation timestamp at the bottom of the page too. Sometimes there are browser refresh issues and old images haven't updated yet, needing a hard refresh or browser cache clear. Including the timestamp within the image wouldn't solve that problem but it would enable that problem to be spotted by viewer of page, so at least they know to hard-refresh by comparing to the report generation timestamp at the bottom of the page.