Substance Proof

Economic-substance and tax-residence rules depend on where directors physically are when the board meets. Jersey's Economic Substance Law requires a quorum of directors physically present in Jersey (Art. 5(3)(b)). Failing the substance test can mean fines of £10,000, then up to £100,000. Today someone checks that by hand, from minutes that only record what people claimed. Substance Proof is for whoever has to rely on minutes they did not write: an auditor, a tax adviser, a due-diligence team, or a trust company's compliance officer. Substance Proof reads the whole meeting pack. SAM 3.1 blacks out QR codes on photos first (it also looks for faces and signatures); if that fails, the photo is not sent to the reader at all. Muse Spark reads minutes, boarding passes, e-tickets and hotel bills, quoting the words behind each fact. Muse Voice Transcribe turns the recording into a timed roll-call. Unit-tested code, not a model, decides NOT MET, REVIEW or EVIDENCED and flags where the minutes contradict the evidence. Muse Glimmer, Meta's open-weight model, re-reads every document independently; if its reading changes the answer, a person reviews. An approval-gated agent drafts follow-up emails, and code checks every tool call. Muse Spark can also turn a statute into rules, and code verifies every quote. On 30 held-out meetings: 30/30 verdicts, 0 dangerous errors. When Muse Image re-photographed those meetings' travel and hotel documents as phone photos, all 30 verdicts held. On 16 harder, realistic packs designed by an outside reviewer: 38/45 directors placed correctly and 1 wrong result, explained in the README. I built all of it, solo, during this hackathon. Every person, company and document is synthetic. Not legal or tax advice. Live demo (recorded real runs, no key needed): https://bsjuilla.github.io/substance-proof/