from Hacker News

I would like to get a list of web sites containing maps, that use tiles, served by the openstreetmap (*.tile.openstreetmap.org). I want to get a list of sites that do not show a proper attribution, which is required by the OSM license.

I suspect I will need to build a web scraper and configure a web bot to crawl the web as Google / Microsoft standard offerings do not seem to support this use case(?). What is the best tool/service/approach to do this?