Thinking LOGICALLY, a single shooter is one person who calls the shots.
What if the key is simply an alternate checksum?
d8586179edf44c5a4dddb8ae750f61b040c2bd98eb284515b039271ade6d80f5.png
CRC32: AEAA9B17
MD5: B21CB2702BDA4237EA213E134B67E1D4
SHA-1: 7D6F765F3609E0BC3674243677529C2F20B8921D
SHA-256: D8586179EDF44C5A4DDDB8AE750F61B040C2BD98EB284515B039271ADE6D80F5
Try mirrored versions using online text mirror tool.
filename of image: d8586179edf44c5a4dddb8ae750f61b040c2bd98eb284515b039271ade6d80f5.png
crc32: aeaa9b17
md5: b21cb2702bda4237ea213e134b67e1d4
sha-1: 7d6f765f3609e0bc3674243677529c2f20b8921d
sha-256: d8586179edf44c5a4dddb8ae750f61b040c2bd98eb284515b039271ade6d80f5
Mirror crc32: 71b9aaea
Mirror md5: 4d1e76b431e312ae7324adb2072bc12b
Mirror sha-1: d1298b02f2c9257763424763cb0e9063f567f6d7
Mirror sha-256: 5f08d6eda172930b515482be89db2c040b16f057ea8bddd4a5c44fde9716858d
Online text mirror tool: http://www.messletters.com/en/mirrored/