[odinho]

How are they storing this? I understand the links, there is enough bits to do that, but an image stored on-chain? How?

Over several transactions and you need to put it together, or will there be enough space to store an image in a OP_RETURN script?

83 bytes doesn't sound like it's enough to store any abuse image.

[drchaos]

Here's an article which describes how to store data in the blockchain, along with some interesting (legal/SFW) examples:

http://www.righto.com/2014/02/ascii-bernanke-wikileaks-photo...