Many believers say there is verifiable proof of Jesus' existence outside of the Bible.
Please post this proof.
It has been well proven that Jesus of Nazareth existed. That man was a real person. Jesus the miracle maker, son of god, walking on water, reviving people and turning water into wine, for that there's no proof.
From the Wikipedia:
"The main accounts of the life and teachings of Jesus are third party narratives written years after his death. The Christian Testament represents sources that have become canonical for Christianity, and there are many apocryphal texts that are examples of the wide variety of writings in the first centuries AD that are related to Jesus. Many scholars have questioned the authenticity and reliability of these sources, and few events that are mentioned in the gospels are universally accepted.
Non-Christian sources which are used to study and establish the historicity of Jesus include Jewish sources such as Josephus and Roman sources such as Tacitus. These sources are compared to Christian sources, such as the Pauline Letters and the Synoptic Gospels, and are usually independent of each other; for example, the Jewish sources do not draw upon the Roman sources. Similarities and differences between these sources are used in the authentication process."
When it comes to the reliability of the Bible as it refers to Jesus and his teachings there are differences of opinions (some of which have caused wars and death).
My own belief is that Such person existed, but he wasn't what Christianity says he was.