I am a bit confused about the transfer of documents done via blockchain.
Let me paint the picture:
Using a supply chain management blockchain as an example. In a supply chain, there are many participants e.g. exporter, customs, importer, delivery, certification body, banks etc.
Lets say the exporter requires a licence. So it applies for a licence to a certification body and receives a licence. That transaction can be recorded as a 'block' and added to the blockchain.
What I am confused about is what data would that 'block' contain? Would it contain the actual document of the licence? If not, can you configure a 'block' so that it contains a link to a database so that if the exporter wants to view is licence, he is able to? Furthermore, would everyone be able to see that 'link'.
I understand that a blockchain is simply a ledger of all the transaction taken place. What I am confused is what sort of data the 'block' contains.
Thank you guys