How do I know this Tekhelet is really it?

Archaeological discovery of mounds of Murex snails at coastal dyeing sites, as well as literary evidence from the ancient world of dyeing and chemical analysis of the Murex dye, are all strong evidence in support of this conclusion. More importantly, the growing number of Rabbinic personalities and halachic communities wearing Tekhelet today, lends further credence to its authenticity. The results of the “real” test, however, will only be validated by its acceptance in the years, if not generations to come.