Attack 5 · original
Long-term archival assumes infrastructure that doesn't exist
'Hash-pinned methodology with three-archive redundancy' sounds rigorous, but IPFS may not exist in 50 years and Software Heritage has uncertain longevity. No archival system has been demonstrated to survive 99 years. If all digital archives fail, the methodology version pinned at deed execution becomes unverifiable.
Scenario
'Hash-pinned methodology with three-archive redundancy' sounds rigorous, but IPFS may not exist in 50 years and Software Heritage has uncertain longevity. No archival system has been demonstrated to survive 99 years. If all digital archives fail, the methodology version pinned at deed execution becomes unverifiable.
Mechanism
Digital archival infrastructure (IPFS, Software Heritage, Landseed systems) fails or becomes inaccessible over the 99-year property term. Without a surviving archive, a future court cannot verify which methodology version governed the property at execution.
Mitigation
Architecture accepts genuine uncertainty. The NRD-lite includes a printed methodology summary as a physical exhibit — a human-readable, paper-archived synopsis of the pinned methodology version. Recording office filings include this printed exhibit, providing paper-based archival redundancy alongside digital archives. The printed summary covers the SEEA EA framework, six dimensions, high-level scoring formula, and indicator categories.
Residual risk
The printed exhibit covers only a 5–10 page summary, not the full methodology. Digital archives remain the primary references. No combination of measures guarantees 99-year archival integrity.