Proposed new #superpower for the nostr protocol - using the ...

Tim Bouma

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Kind-1 (TextNote)

2026-04-13T14:32:15Z

Proposed new #superpower for the nostr protocol - using the “o” tag to store the sha256 digest of any original document/byte array (pdf, jpg, bin, etc).

That means the digest is automatically indexed searchable as the “#o” tag in a filter.

I’ve tested it. It works. I am planning to use this for transferable title documents, such as electronic bills of lading (printed as a PDFs).

This approach also releases me from those janky proprietary certificate authority schemes, like Adobe Acrobat that try to trick you into a subscription service when all you want to do is issue and validate the authenticity of a f***ing pdf, without using some paid certificate authority racket.

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