It focused narrowly on areas in and around active genes, ignoring the 98.5% of genomic material known as "junk DNA." This process pinpointed 25, 000 genetic landmarks called SNPS (single nucleotide polymorphisms, or "snips"), places where a single dna letter varies from one person to the next.
The Content ID process, in fact, is specifically intended to give copyright holders options other than either ignoring or cracking down hard on uploaders who may be loyal fans as well as infringers.