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Could the cube be morse code horizontally and vertically? For example:
Edit: Looking more closely, the dashes seem to vary in length which more or less rules out it being morse code... However with code running vertical and horizontal maybe there are just some "artifacts"... Or maybe tap code/some other form of dots/dashes code? hmmmm.... |
I think those might be barcodes, try stretching the two bars you extracted and decoding them here:
https://online-barcode-reader.inliteresearch.com/