Nostr Web Client

Just use OP_RETURN for a Nostr note ID and be done with it

Your welcome

Simpler than an OTS?

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I was thinking just about a globally unique id, but, yes, a signature or a hash of a signature makes more sense

This is stupid simple. I love it.

I was looking at Open Timestamps, but a tx with the event id in op_return does the job!

The event id is all you need. That could be put in a tx, and the resulting txid when published in a block could be referenced in another nostr event.