0                   1                   2                   3
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+---------------+---------------+---------------+---------------+
|                       Previous Manifest                       |
|                              Hash                             |
+---------------+---------------+---------------+---------------+
|                       Current Manifest                        |
|                              Hash                             |
+---------------+---------------+---------------+---------------+
|                      DRIP Link (BE: HDA, UA)                  |
|                              Hash                             |
+---------------+---------------+---------------+---------------+
|                                                               |
.                                                               .
.                      ASTM Message Hashes                      .
.                                                               .
|                                                               |
+---------------+---------------+---------------+---------------+