Using Blockchain to Keep Public Data Public

"A public blockchain, like the one bitcoin uses, is a ledger that keeps time-stamped records of every transaction. Recording a transaction on a public blockchain is the digital equivalent of writing something in stone — it’s permanent. More important, it’s publicly available for anyone to see and verify.

The first public blockchain was conceived of as a way to record financial transactions, but people have started using it as a way to timestamp the existence of digital files, such as documents or images. The public blockchain establishes that a specific person or entity had possession of a file at a specific date and time. Useful for patent or copyright claims, the blockchain could also ensure that a government agency or company verifiably published its data — and allow the public to access and confirm that the file they have is the same one that was signed and time-stamped by the creator.

The time-stamp and signature alone don’t prove that the data is accurate, of course. Other forms of checks and balances, such as comparing data against tax or SEC filings, can be added to ensure that there are legal ramifications for entities that manipulate their data. In the same way, government data, like employment or climate data, could be checked against local, state, or academically collected information that has already been time-stamped and signed by credible institutions.

Using the public blockchain in this manner would not only address our data access and manipulation issues but also lay the groundwork for a better system to more efficiently and effectively regulate the fastest-moving startups. Some tech companies, with their near-instantaneous feedback loops, believe they can regulate their ecosystems more efficiently and effectively than governments can, with its antiquated, in-person inspection efforts. And there’s some truth to that. Right now, many local and state governments regulate ride sharing and home sharing in ways similar to how they regulate taxis and hotels, with a combination of police officers, signs, and consumer complaints through 3-1-1 calls. At the same time, governments have watched these startups manipulate their data, and are therefore reticent to trust a company that might put its financial motivations ahead of regulation."