1.
«an unofficial and unlicensed recording (might be a live concert as well as radio show, TV program, discarded studio material etc.) that was not released by the artist (or their label) made with a recording device smuggled into a live concert or with a professional equipment directly from the mixing board. Most of the bootlegs are outlawed but in fact it’s for the copyright holder to decide whether a bootleg is illegal or not»: „US law defines bootlegs as being recordings of the original performances, as opposed to copies of already released music”. http://news.bbc.co.uk, accessed on 12.11.2004.

2.
«sometimes referred to as mash-up»: „When the Belgian DJ duo 2ManyDJs were creating their own album of "bootlegs" – hybrid tracks that mix together other people's songs (…) – they decided to get permission to use every one of the hundreds of tracks they mashed together”. www.salon.com, accessed on 8.11.2004.