This site was originally created by Beardog: https://chaoswebs.net/image-sri/.
I added a check whether the browser supports Subresource-Integrity (SRI) at all. If you see no-sri.png instead of the raven, then your browser does not verify the Subresource-Integrity. If you see failed.png, then the Subresource-Integrity check failed. Read the source for details.
The success-image is raven from WTactics (scaled and cropped), licensed under GPLv2 or later and created for the WTactics project.
Find me on http://draketo.de.