Indeed, in order to have something stored in the blockchain, you have to make a transaction, which incurs costs. However, reading the blockchain is free (once y

Indeed, in order to have something stored in the blockchain, you have to make a transaction, which incurs costs. However, reading the blockchain is free (once you exclude network traffic costs and electricity). This is an overview of how blockstack works: https://blockstack.org/docs/how-blockstack-works https://blockstack.org/docs/how-blockstack-works This is a description regarding the transaction fees on the bitcoin blockchain: https://en.bitcoin.it/wiki/Transaction_fees https://en.bitcoin.it/wiki/Transaction_fees Here are some real time stats regarding the costs/byte of info to be stored in the blockchain (in satoshis - 1 USD is approx 45k satoshis at today's BTC price)