Anecdotal kode (code) for humans

In extension to this anecdotal thought I would like to say that a witness of any SHA256 hash consisting of two octets (two bytes, 0xFFFF maximum) can be easily put into the locktime of a transaction. This does not influence the raw transaction size.

Example:

BITCOIN BITCOIN BITCOIN BITCOIN

896366 ak: e..5 84
Any other plaintext follows

BITCOIN BITCOIN BITCOIN BITCOIN

The plaintext could be easily signified - see signify(1) - OpenBSD manual pages

The header and footer lines ensure easy optical check that the plaintext is not a result of a collision.

The SHA256 of above preformatted plaintext obtained on the command line with sha256sum is 16a49ef7d7f3fab3276dc1f46205baa805ef57d6e0e8069aebd65eedaf554517 which humanized and anectotalized is:

         #       #       #
        # #     # #     # #
       #   #   #   #   #   #
      #     # #     # #     #
      ####### ####### #######
      #     # #     # #     #

  ,----- .123 4567 89ab cdef -----,
  |                               |
  | ..   16a4 9ef7 d7f3 fab3   .f |
  | 1.   276d c1f4 62.5 baa8   1f |
  | 2.   .5ef 57d6 e.e8 .69a   2f |
  | 3.   ebd6 5eed af55 4517   3f |
  '===   ==== ==== ==== ====   ==='
   ak:   7.15 c.

Here is a Testnet4 example transaction (note its Locktime; 0x7015=28693)