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DefendableDocs

SHA-256 Hashing

The algorithm

JSON canonicalization: sorted keys · no whitespace · UTF-8 encoding. SHA-256 over the canonical bytes. The exact algorithm runs identically in:

  • Python streetchat.ledger.canonicalize() + hashlib.sha256
  • TypeScript canonicalize() in street-ledger/scripts/build-ledger.ts
  • TypeScript canonicalize() in street-ledger/src/pages/Verify.tsx (browser · crypto.subtle.digest)

Why determinism matters

If the hash depends on key ordering · whitespace · or encoding choice · the proof breaks. Two parties computing the hash from the same JSON must always get the same answer. Otherwise the chain-of-title is fiction.

How to verify locally

Terminal window
# Pull the term JSON
curl -s https://ledger.mrdefendable.com/ledger/terms/cre_terms/{slug}/v1/term.json > term.json


# Hash it (must match the publicly stamped hash)
python3 -c "import json, hashlib; raw=json.load(open(term.json)); ..." # or use the streetchat CLI

Same algorithm · same output · every time.

🐝 Operator-grade · books and records · to the shed.

This is a foundational page in the DefendableDocs ecosystem map. The structure is committed · the deep content extends as the platform matures. Cross-references are live below.