ryanwold.net - Civic Tech, Bitcoin, and Open Government Innovation

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In August 2025, the [BEA](https://www.bea.gov) published the  2025 Quarter 2 Gross Domestic Product report [as a .pdf](https://www.bea.gov/sites/default/files/2025-08/gdp2q25-2nd.pdf).

On August 28, 2025, the Department of Commerce posted the hash of the .pdf to 9 blockchains.

A hash is like a unique [fingerprint](https://en.wikipedia.org/wiki/Fingerprint_(computing)) for a digital file (which is a sequence of bits).

Like a fingerprint, a hash is often used for identification; in this case, the [veracity](https://en.wikipedia.org/wiki/File_verification) of a file.

The U.S. Department of Commerce press release is [here](https://www.commerce.gov/news/press-releases/2025/08/department-commerce-posts-2nd-quarter-gross-domestic-product-blockchain).

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The sha 256 hash of the .pdf document is

`c70972a12908b73c2407d9cc6842ba2a02203a690f3090cd29f30c45f0cfd93d`

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I took a look at the data in a [Livebook](https://livebook.dev/). 
The source code repository is here:  https://github.com/afomi/commerce-blockchain-hash.

You can see how the transactions [look](https://github.com/afomi/commerce-blockchain-hash.) on different chains:

* btc
* eth
* sol
* stellar
* tron (I'm not getting a successful response from on API -  TODO: follow up here)

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While technically, this isn't too impressive, I do think it is a notable signal regarding the usage of blockchains to increase veracity of data.

Publishing verifying metadata for datasets has been tried in various forms, and I'm glad to see this approach.

It's not perfect. It could be more usable, user-friendly for the non-technical person -- always room for improvement. But there are real technical concepts that must be understood and can't be oversimplified.

Publishing these hashes generates awareness of how blockchains can be put to use – and provide utility related to the veracity of information.

Overall, this is another effort toward data veracity, and I'm glad to see it.

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