Yes adchoices symbols are used by Google Adsense ads. See this official post <a href="http:&#x2F;&#x2F;adsense.blogspot.com&#x2F;2011&#x2F;03&#x2F;new-in-ads-notice-label-and-icon.html" rel="nofollow">http:&#x2F;&#x2F;adsense.blogspot.com&#x2F;2011&#x2F;03&#x2F;new-in-ads-notice-label-...</a>