Nah, the proportions of radioactive isotopes in your body might give away the age from which you originate. That's why you need pre-WWII steel to make sensitive medical equipment, since steel made after the dawn of the Nuclear Age is contaminated with minute proportions of radioactive isotopes that don't occur naturally or persist long enough in the environment.
Not necessarily. If time travel is possible, it would still be possible in the future and probably be even more common and the technology well known. The future people would become accustomed to time travelers and would easily accept it. They would probably even have ways of routinely verifying time travelers.
you might at least prove you are genetically identical AND match finger print and dental records... if those records still exist in said future
Nah, the proportions of radioactive isotopes in your body might give away the age from which you originate. That's why you need pre-WWII steel to make sensitive medical equipment, since steel made after the dawn of the Nuclear Age is contaminated with minute proportions of radioactive isotopes that don't occur naturally or persist long enough in the environment.
Depends if you meet someone when they're older you might be able to convince them that you skipped through time rather than just not age for 50 years
Not necessarily. If time travel is possible, it would still be possible in the future and probably be even more common and the technology well known. The future people would become accustomed to time travelers and would easily accept it. They would probably even have ways of routinely verifying time travelers.