Sort:  

People do it different ways. You could post on another social media account ank link back, or add a new photo with date and your steemit name, or have someone on the site vouch for you. I believe you have 24 hours from posting to edit this post; otherwise, maybe add separate authentication post with link in a comment on this. I'm still new, but that's what I've observed. I hope that helps.

Coin Marketplace

STEEM 0.06
TRX 0.32
JST 0.066
BTC 71292.98
ETH 2194.15
USDT 1.00
SBD 0.49