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This is what Google are calling "knowledge graph" - their own rather cynical take on the semantic web. The idea is to pull data on known entities from a number of sources and present them in once place. The main sources of information are: Wikipedia Freebase Google's own search data a multitude of data-specific sources I am afraid I have no idea what the actual sources are for band information. However if some is wrong on the knowledge graph results you might be able to find out: Look for other authorative sources where the data is wrong. The important thing to remember is that little (any?) of that data is unique to knowledge graph - it is pulling data from elsewhere. Correct those sources and it should follow. Start with checking wikipedia.com and freebase.com  - then look for other high authority sources that are likely to be used. Where would YOU look for that information? Sorry I can't help more with the specifics.