| CPC G06K 7/1413 (2013.01) [A61B 5/0002 (2013.01); A61B 5/01 (2013.01); A61B 5/1032 (2013.01); A61B 5/14514 (2013.01); A61B 5/14532 (2013.01); A61B 5/1455 (2013.01); A61B 5/442 (2013.01); A61B 5/4833 (2013.01); A61B 5/6833 (2013.01); G01N 33/5302 (2013.01); G06K 7/10297 (2013.01); G06K 7/1417 (2013.01); G06Q 20/401 (2013.01); H04L 9/50 (2022.05); H04N 1/00342 (2013.01); A61B 2562/0247 (2013.01); A61B 2562/0261 (2013.01); A61B 2562/0271 (2013.01); A61B 2562/08 (2013.01)] | 16 Claims |

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1. A skin patch for detecting patient compliance with a pharmaceutical treatment protocol for a specific pharmaceutical comprising:
a printable blockchain optical sensor unit comprising: at least one optical sensor, a first plurality of permanent reference colors, an identification code, a central hole, an orientation reference and an adhesive configured to removably secure said patch to a skin of a person;
wherein said optical sensor is configured to measure an application by the person of the specific pharmaceutical inside the central hole; and
wherein an output from said optical sensor unit is configured to be uploaded to a blockchain network by a wireless reader.
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