Methods and system of tracking and tracing for supply chain by the use of barcode and peer review

A system for tracking a supply chain of a package by using a barcode, the system comprising:

• a main database device configured to issue the barcode with an initial value;
• a first mobile device configured to:
• scan the barcode at an initial location;
• pair the barcode with the first mobile device;
• receive transaction information of the package;
• and
• update the barcode to include the transaction information,
• wherein the main database device is further configured to validate the barcode with a first digital signature corresponding to the first mobile device, and unpair the barcode with the first mobile device;
• a second mobile device configured to:
• scan the barcode by a second mobile device located in the initial location;
• and
• pair the barcode with the second mobile device,
• wherein the main database device is further configured to validate the barcode with a second digital signature corresponding to the second mobile device, and track a location of the package that is moving along with the second mobile device,
• wherein the second mobile device is further configured to scan the barcode at an interim location, and
• wherein the main database device is further configured to validate the barcode with the second digital signature corresponding to the second mobile device, and unpair the barcode with the second mobile device;
• a third mobile device configured to:
• scan the barcode at the interim location;
• and
• pair the barcode with the third mobile device;
• wherein the main database device is further configured to validate the barcode with a third digital signature corresponding to the third mobile device, and track the location of the package that is moving along with the third mobile device,
• wherein the third mobile device is further configured to scan the barcode at a final location, and
• wherein the main database device is further configured to validate the barcode with the third digital signature corresponding to the third mobile device, and unpair the barcode with the third mobile device;
• a fourth mobile device configured to:
• scan the barcode at the final location;
• and
• pair the barcode with the fourth mobile device,
• wherein the main database device is further configured to validate the barcode with a fourth digital signature corresponding to the fourth mobile device, and deactivate the barcode;
• and
• a blockchain database device connected with the main database device with hash reference pointers and configured to process confirmations of data validated by the main database device by receiving inputs from third party user devices.