{
 "title": "State of the Art Notice: independent integrity for logs and records",
 "issued_by": "sebbi.pro (Monop Content)",
 "statement": "Methods that let a person outside an organisation detect any alteration, deletion or back-dating of that organisation's logs and records are published, are free to check, and are in production use. From the sealed date of this notice, no one relying on a self-attested log can say that an independent check was unavailable, unproven or unaffordable.",
 "methods": [
  {
   "year": 1991,
   "what": "Linked time-stamping of digital documents",
   "ref": "Haber and Stornetta, 'How to Time-Stamp a Digital Document', Journal of Cryptology 3(2)"
  },
  {
   "year": 2001,
   "what": "Trusted time-stamp protocol",
   "ref": "IETF RFC 3161"
  },
  {
   "year": 2013,
   "what": "Append-only public logs with inclusion and consistency proofs (Certificate Transparency)",
   "ref": "IETF RFC 6962; RFC 9162 (2021)"
  },
  {
   "year": 2014,
   "what": "Qualified electronic time stamps with a legal presumption of the integrity of the data",
   "ref": "Regulation (EU) No 910/2014 (eIDAS), Article 41(2)"
  },
  {
   "year": 2016,
   "what": "Timestamps committed to the Bitcoin blockchain, checkable by anyone",
   "ref": "OpenTimestamps (opentimestamps.org), open source"
  },
  {
   "year": 2021,
   "what": "Public transparency logs for software signing",
   "ref": "Sigstore Rekor, open source"
  },
  {
   "year": 2026,
   "what": "Sealed, Bitcoin-timestamped records of AI decisions with a free offline verifier",
   "ref": "sebbi.pro, https://sebbi.pro/forever"
  }
 ],
 "cost": "Checking is free under every method listed. Timestamping a fingerprint through the public notary at https://sebbi.pro/bitcoin is free. Continuous sealing with sebbi.pro is 50p per device per month.",
 "what_leaves_the_organisation": "A fingerprint (SHA-256). Never the record.",
 "test_it": "https://sebbi.pro/log-test",
 "rule": "https://sebbi.pro/independent-check-rule",
 "notice_version": "1",
 "sha256": "e17d13ed797e4162747782e69d0bdb4da1c31daced0577702996db89a02e81f5",
 "sealed_utc": "2026-11-10 15:39:56 UTC",
 "sealed_block": 37722,
 "fingerprint_rule": "SHA-256 of the canonical JSON of the notice (keys sorted, separators ',' and ':', UTF-8)",
 "check_the_chain": "https://sebbi.pro/forever"
}