Proof For Picture -or- Picture For Proof

When seen as Picture For Proof, it is common social media jargon to request a picture from a friend to verify that they are who they say they are or did what they said they did. When seen as Proof For Picture, it refers to NFT art.PFP is a way of building trust. 

See also : WTTP  PAP  pixel  
NetLingo Classification: Acronyms and Text Message