In accordance with the article ,
The copyleft symbol represents the reverse side of C in a circle (copyright symbol Β© Mirror). This does not have legal significance. [49]
Since it is not available in Unicode, it can be approximated by the character U + 2184 β LATIN SMALL LETTER REVERSED C or the more widely accessible character U + 0254 Ι LATIN SMALL LETTER OPEN O between the brackets "(Ι)" or, if supported by the application, by combining it with symbol U + 20DD ββ COMBINATION CIRCULATION: 'ββ'. [50] a discussion on the Unicode mailing list in July 2012 claimed that there are other ways to insert a copyleft character, so it does not need to be encoded. [51]
You need to read the articles that you give to the end.
What you can always do is use CSS with 3D transforms, use for your writing:
transform: rotateY(180deg);
but, of course, be aware of vendor prefixes / browsers that don't support it
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