You could try to stamp delegation and revocation declaration...

Raw JSON

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  "id": "a179ab15249c082a75f2e1bbe4d84ac257827ced4e3913313cefb14b2a1d93b1",
  "pubkey": "d1a61498f4b1dc26df0becd1a3e9e88f355fb614b771e8b5b277d0ff99a82a23",
  "created_at": 1788049828,
  "tags": [
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      "wss://relay.primal.net/",
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      "wss://nostr.wine/",
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  "content": "You could try to stamp delegation and revocation declarations on BTC, but I wasn't sure if there's an easy way to look them up by participating keys, so it seemed easier to use Ethereum. As for gas prices, I just looked up a series of transactions recording a 3-key delegation chain, and it came to about 518k gas in total.",
  "sig": "dbbe54a839039955675ae9aec1f01b99470ade0e7d5f1ad619548a585aa8350b61c4c4284492fcf856599536e6844c15ae51c40ba552875a3b31eb6e428571a9"
}