Stored at 512 × 384 px · shown at 1.1× Written to the chain on 20 May 2015, block 357,239.
A photograph of Bitcoin researchers and developers at dinner with Nick Szabo, each face tagged with a Twitter handle, stored as base64 inside an input script in 2015. It circulated as evidence in the endless argument over whether Szabo is Satoshi Nakamoto — an argument the photo cannot settle, which is presumably why someone thought it worth making permanent.
Some artifacts are visible or strongly evidenced, but the exact storage recipe is not fully understood yet. The bytes may appear in a recognizable place, or an external index may identify the object, while the original uploader’s ordering, compression, or framing convention remains unclear.
More about unknownEvery byte shown here was read from these transactions. Open one in a block explorer to check it yourself.