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`.
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Equivalentes noutros sítios
- Próximo de Wikidata
O que diz o blogue
- Une relation a une histoire
Un système d'information répond au présent. Bloch demande depuis quand — et cette question a un coût technique précis : une date de mise à jour globale, la plus rassurante des affirmations fausses, et un historique qu'on a coupé nous-mêmes.
- Les traces ne parlent pas toutes seules
Marc Bloch ne demandait pas si un document dit vrai, mais ce qu'on a devant les yeux. Ce que cette question a coûté à écrire dans notre code : six statuts, un vocabulaire fermé, et un cadenas qu'on refuse de poser.
- Ninguém vai ler o rótulo
Herbert Simon, racionalidade limitada: quatro segundos perante trinta referências. O selo é um atalho racional — mas é preciso poder descomprimi-lo.
- Porque é que os rótulos já não convencem ninguém
Michael Spence (Nobel 2001), a sinalização onerosa, e o que distingue uma prova de uma promessa: porque um rótulo que toda a gente pode apor já não sinaliza nada — e como a prova muda o jogo.
- Kochtcheï : la propriété vit ailleurs que dans l’objet
La mort de Kochtcheï est dans une aiguille, dans un œuf, dans un canard, dans un lièvre, dans un coffre. Ce que le conte dit d’une fiche produit : copier ou relier, qui tient la dépendance, et pourquoi notre vocabulaire connaît 69 propriétés pour un seul vrai verbe.
- Sankofa : pouvoir revenir en arrière
L’oiseau akan avance en regardant derrière lui. Ce que cela demande à un registre : deux axes de temps au lieu d’un, des corrections qui n’effacent pas, et une limite — le droit à l’oubli.
- La glace était sûre hier
Une information peut être exacte le matin et dangereuse le lendemain sans que personne n’ait menti. Ce que la banquise apprend sur la péremption d’une vérification — et sur le voyant vert qui ne devient jamais gris.
- Dede Korkut : le nom vient après l’acte
Chez les Oghouz, l’enfant n’a pas de nom tant qu’il n’a rien fait. Quatre rôles séparés, un nom qui contient sa justification — puis quarante hommes qui le détruisent en deux fois vingt. Ce qu’un registre doit à celui qu’il a qualifié.
- Uma prova não é um facto. É um caminho.
O que faz uma prova não é a sinceridade nem a precisão, mas a continuidade: uma cadeia de transformações cujo cada elo permanece reversível.
- Uma tonelada não é uma tonelada
Origem ou percurso? Do duelo local/commodity ao crédito de carbono: porque é que uma tonelada vale o que vale o seu lugar, e o que um índice muda num crédito.
- La preuve était en Calibri
Une affirmation a circulé neuf ans avant qu’on puisse la vérifier. Ce qui l’a fait tomber n’était pas une autorité : c’était une police de caractères restée dans un tableur.
- 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.
- As três formas de conhecer um tomate
Signo, razão, singular: os três géneros de conhecimento de Spinoza aplicados a um tomate — do rótulo ao passaporte de produto verificável.
- O carimbo e a coisa
A cerimónia ou a substância: com Spinoza, porque a declaração de conformidade é um rito — e como a prova mostra finalmente o que a norma realmente quer.
- EUDR: o que o regulamento antidesflorestação muda para os produtores
Regulamento (UE) 2023/1115: produtos abrangidos (cacau, café, madeira, soja, óleo de palma, bovinos, borracha), obrigações de DDS, geolocalização, calendário 2025, sanções até 4 % do volume de negócios europeu.
- Quatrocentos mil sensores que não existiam
A eFishery declarava 400 000 alimentadores conectados junto aos seus tanques. Havia 24 000. O que a sua queda diz a quem vende rastreabilidade.
- Choosing HACCP software: what really separates the tools
Floor app, proof platform, ERP module: what each family does well and badly, the six questions that commit a vendor, and how to read a quote where the advertised price is almost never the price paid.
- Moving your food-safety management plan to digital: a practical guide
What an inspection actually asks for, what you can digitise without changing everything, how to structure records so they hold up under scrutiny — with a starting checklist.
- Proving your cold chain: what to measure, and how
Regulatory thresholds by product family, where to place sensors, how to alert before a break rather than record it afterwards — what an inspector looks at first, and the mistakes that invalidate a record.
- E-invoicing in France, 2026: timetable, formats, preparation
What “electronic invoice” actually means, who is affected and when, what you need in place before the deadline — the French reform explained without jargon, with a preparation checklist.
- Packaging: what France’s AGEC law actually requires in 2026
Triman, sorting information, packaging EPR, the phased ban on single-use plastic — what already applies, what remains unclear, and the labelling mistakes that come up most often.
- EUDR: the application timeline, and what has changed since 2023
30 December 2026, and 30 June 2027 under conditions. The EUDR has been postponed twice — and the second postponement also lightened the obligations: downstream operators no longer file a statement.
- EGalim: France’s food law explained simply, what has been mandatory and since when
The French national food conference, organic thresholds, limits on promotions, a vegetarian menu: EGalim brings together several distinct obligations that came into force on different dates. The full overview, without jargon.
- Reducing food waste in French canteens: the little-known EGalim obligations
Mandatory assessment, donation agreement, a ban on making unsold food unfit for consumption: what France’s EGalim law actually requires against waste in collective catering, beyond good intentions.
- Digital attestation vs paper certificate: what changes legally
An electronic signature does not carry the same value as a scanned handwritten signature. What the law recognises, and what distinguishes a digital attestation that can be relied upon from a PDF signed by hand and then scanned.
- Traceability data security: what a supplier must guarantee
Who can see your data, where it is hosted, what happens in the event of a breach — the security guarantees to check before entrusting your traceability to a third-party tool, in non-technical language.
- Organic, HVE, Label Rouge: French certifications explained and compared
Three different logics behind three common logos — the absence of synthetic inputs, overall environmental performance, superior quality. What each one really guarantees, and what none of the three covers.
- How a label is audited: the certification process explained
Document audit, on-site audit, sampling, minor and major non-conformities: what actually happens between the certification application and the logo on the package, from the producer’s side.
- Stacking labels: the real cost and return on investment for a producer
Each additional certification has a direct cost and an ongoing management cost, not just an image benefit. How to assess whether a new label brings in more than it costs, before committing.
- Self-declaration vs third-party certification: the difference that matters to a buyer
A “pesticide-free” claim freely chosen by a producer and a label audited by an independent body do not carry the same evidential weight, even when they look alike on a package. How to tell them apart, and why both have their place.
Onde é implementado
lib/onchain-anchor.ts