Using Y-DNA results, any two individuals can compare their profiles to see whether they descended from the same paternal line. If the Y-DNA test shows that two individuals have different Y-DNA profiles, it would conclusively prove that they did not descend from the same paternal lineage. You can use your Y-DNA profile to compare with other individuals in your tree to confirm a positive linkage, verify new linkages, or verify findings from your paper research. You can also use your Y-DNA markers to search our global database to find potential matches from around the world. You can even choose to receive automatic notifications by email whenever a new match is found.