Attestation
Enregistrement signé en Ed25519 qui fige un fait métier daté — une généalogie de lot, un relevé HACCP, une empreinte carbone, un rappel. Elle porte l'empreinte d'une charge utile canonique, la référence de son signataire, et l'état de son ancrage. Une quarantaine de types existent, du `genealogy` au `haccp_ccp`.
Notions liées
Équivalents ailleurs
- Proche de Wikidata
Ce que dit le blog
- No One Will Read the Label
Herbert Simon, bounded rationality: four seconds facing thirty options. The label is a rational shortcut — but it still has to be decompressible.
- Why Labels No Longer Convince Anyone
Michael Spence (Nobel 2001), costly signaling, and what separates proof from a promise: why a label anyone can slap on no longer signals anything — and how proof changes the game.
- A Proof Is Not a Fact. It Is a Path.
What makes a proof is neither sincerity nor precision, but continuity: a chain of transformations in which every link remains reversible.
- A Tonne Is Not a Tonne
Origin or path? From the local-versus-commodity duel to the carbon credit: why a tonne is worth what its place is worth, and what an index changes about a credit.
- Signer, relier, publier
Un système de preuve fait trois choses distinctes. Pourquoi la signature vient d’abord, pourquoi relier fait le vrai travail, et à quel moment une chaîne devient nécessaire.
- Three Ways of Knowing a Tomato
Sign, reason, singular: Spinoza’s three kinds of knowledge applied to a tomato — from the label to the verifiable product passport.
- The Stamp and the Thing
Ceremony or substance: with Spinoza, why a declaration of conformity is a rite — and how proof finally shows what the standard truly wants.
- EUDR: what the anti-deforestation regulation changes for producers
Regulation (EU) 2023/1115: products covered (cocoa, coffee, wood, soy, palm oil, cattle, rubber), DDS obligations, geolocation, 2025 timeline, penalties of up to 4% of European turnover.
- Four Hundred Thousand Sensors That Did Not Exist
eFishery reported 400,000 connected feeders at the edge of its ponds. There were 24,000. What its collapse says to anyone who sells traceability.
Où c'est mis en œuvre
lib/onchain-anchor.ts