I've noticed some of these for years. When designing a music database, you do need to be aware of them. You need to use unique identifiers instead of names.

I've noticed some of these for years. When designing a music database, you do need to be aware of them. You need to use unique identifiers instead of names. last.fm doesn't do this. There were four bands called Kaleidoscope, all active around the same time: one from England, one from Mexico, one from the USA, and one from Canada. To disambiguate them, generally the country is specified, e.g. Kaleidoscope (UK). There were two bands called Bulldog Breed, both of which recorded albums called Made in England. They're decades apart, but as albums can be re-released, they're normally disambiguated by record label, e.g. Bulldog Breed: Made in England (Deram). There are two Nirvanas, the original UK-based band, and the US one. The UK Nirvana recorded a cover of Lithium. You'll be aware that the Beatles recorded an album called Revolver. A Russian band, called Revolver, recorded an album called Beatles. Do you include the definite article in the band's name? If so, what about The The? Tintern Abbey released a single single, the A-side of which was called Beeside.