I have finalized NIP-FF-3 as a potential successor to NIP-03. It's fully implementable now and Fanfares (npub16lv…7j3k) will be implementing it shortly.
NIP-03 allowed a nostr identity to attest to an event at a block height.
NIP-FF-3 allows a nostr identity to attest to **content** at a block height, and minor edits to that content won't necessarily invalidate the OpenTimestamp proof.
It's great for not only proving the time something was created, but also for proving originality and weeding out plagiarism at a protocol-level. You can REQ for events that have plagiarized yours via the X tag; obviously this depends on clients to opt in, but it's so easy that the primary reason not to is TREACHERY and RAPSCALLIONISM 😜
Check it out: https://nostrhub.io/naddr1qvzqqqrcvypzp68dx7vvdlltl7sg2qdv8838ze3tl5tq76y0jnz966fdsana6dz6qy2hwumn8ghj7cnpwdehq6tnw3hkctn0wfnj7qphde5hqttxvcknxtt9v35hgttyw4exzcnvv5kk7ur9de6xjmt9wd6xzmts943k7mn5v4h8gttpw368y6tzw46xjmmwqec48c
Constant (npub1t6j…ksrw) Peter Todd (npub1ej4…ndrm) fiatjaf (npub180c…h6w6)
arkinox
npub1ar…rh43w
2026-06-10 21:26:32 UTC
Author Public Key
npub1arkn0xxxll4llgy9qxkrncn3vc4l69s0dz8ef3zadykcwe7ax3dqrrh43wPublished at
2026-06-10 21:26:32 UTCEvent JSON
{
"id": "61224ed52aca63f9c6b2d9ad11ea96ff2ec2e8f375443dafe0f75bb6319d0a0e",
"pubkey": "e8ed3798c6ffebffa08501ac39e271662bfd160f688f94c45d692d8767dd345a",
"created_at": 1781126792,
"kind": 1,
"tags": [
[
"p",
"d7d8109ee43657ce6056ada4653006bbb641f31e50e85243681c2724507811ec"
],
[
"p",
"5ea4648045bb1ff222655ddd36e6dceddc43590c26090c486bef38ef450da5bd"
],
[
"p",
"ccaa58e37c99c85bc5e754028a718bd46485e5d3cb3345691ecab83c755d48cc"
],
[
"p",
"3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d"
]
],
"content": "I have finalized NIP-FF-3 as a potential successor to NIP-03. It's fully implementable now and nostr:npub16lvpp8hyxetuuczk4kjx2vqxhwmyruc72r59ysmgrsnjg5rcz8kqk07j3k will be implementing it shortly.\n\nNIP-03 allowed a nostr identity to attest to an event at a block height.\n\nNIP-FF-3 allows a nostr identity to attest to **content** at a block height, and minor edits to that content won't necessarily invalidate the OpenTimestamp proof.\n\nIt's great for not only proving the time something was created, but also for proving originality and weeding out plagiarism at a protocol-level. You can REQ for events that have plagiarized yours via the X tag; obviously this depends on clients to opt in, but it's so easy that the primary reason not to is TREACHERY and RAPSCALLIONISM 😜\n\nCheck it out: https://nostrhub.io/naddr1qvzqqqrcvypzp68dx7vvdlltl7sg2qdv8838ze3tl5tq76y0jnz966fdsana6dz6qy2hwumn8ghj7cnpwdehq6tnw3hkctn0wfnj7qphde5hqttxvcknxtt9v35hgttyw4exzcnvv5kk7ur9de6xjmt9wd6xzmts943k7mn5v4h8gttpw368y6tzw46xjmmwqec48c\n\nnostr:npub1t6jxfqz9hv0lygn9thwndekuahwyxkgvycyscjrtauuw73gd5k7sqvksrw nostr:npub1ej493cmun8y9h3082spg5uvt63jgtewneve526g7e2urca2afrxqm3ndrm nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6",
"sig": "4d8a18f78c841843323842323b7675392d88b3439af44409c29586e802c62e7b403d74bbedf8873f76d29f4aea625c0d51181c4186c8ee1fa6408b520be923bd"
}