You received a bid of $1M for 49% of the collection and you didn't take it? 

The ERC20 tokens being from 2017 is a good start, and it appears the images are also from around that time, but last I looked at it I didn't see anything that necessarily connected the art with the tokens on the blockchain or elsewhere.

What would help is links to something that proves the "off-chain provenance" of the artwork being associated with the tokens.