# Apparat — Data Fidelity Register *Verified facts, each sealed and anchored in a public transparency log. See release.json for the release identifier, commitment and anchor.* | Label | Value | Unit | Period | Type | Subject | Source | Seal | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Client discoverability requirement for inbound link** | A link to it from the main site | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/faq) | `e86a7f3c06985911...` | | **Client subdomain bot-filtering policy compliance** | keeping the register's subdomain clear of any rule that would block the very agents it exists to serve | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/faq) | `f508cfb9bac49fb6...` | | **Client technical requirement for DNS configuration** | point a subdomain at the register with a single DNS record | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/faq) | `3bd198c8d748d4d1...` | | **Commercial versus open division of Apparat capabilities** | What is commercial is the making and running of a register; what is open is everything needed to trust the result without us. | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/faq) | `e119a95a884538e9...` | | **Data Fidelity Register creation pipeline** | a model reads the organisation's public documents and proposes facts, a separately configured model reviews each against its cited source, and then the candidates are checked by hand before anything is sealed | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/faq) | `73bb2c16c0dd6d19...` | | **License of the register checker tool** | MIT licence | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/how-it-works) | `e3f27c2a9f2474e3...` | | **License of the register format specification** | CC BY 4.0 | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/how-it-works) | `968a9af255529025...` | | **Open elements of Apparat** | The specification and the verifier | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/faq) | `f56836cd990e956a...` | | **Process for reading and checking facts** | A model does the reading; a separately configured model checks it | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/how-it-works) | `c7e2e99030e12704...` | | **Proprietary elements of Apparat** | The engine that produces a register, the extraction and sealing pipeline | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/faq) | `11c30b6af805e4d8...` | | **Recording of undeployed releases** | Every release is recorded, including those never deployed | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/how-it-works) | `a1827e16ddaa01a4...` | | **Register continuity if Apparat ceases** | Static files on the organisation's own domain | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/faq) | `097dee5474eed2de...` | | **Resolution of citations to historical releases** | a citation made against an earlier release still resolves after the correction | | | OPERATIONAL_POLICY | | [apparat-source-copy](https://derappar.at/how-it-works) | `d3d43c239c222008...` | | **Apparat core product** | Data Fidelity Registers | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/) | `0fca7b5357fbf966...` | | **Apparat primary function** | Apparat builds and operates the register | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/faq) | `98b2e6e19e9ff759...` | | **Availability of verification method and reference tool** | published | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/how-it-works) | `f01315cb0fd00859...` | | **Cryptographic release commitment construction** | Merkle tree | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/faq) | `3f13be431e413d7b...` | | **Cryptographic seal formula for a single fact** | SHA-256( label · value · unit · time_period · context · source_url ) | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/faq) | `f072f390897aef5b...` | | **Data Fidelity Register attestation** | faithful to the source cited beside it | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/how-it-works) | `6a723e5c9fa4494f...` | | **Data Fidelity Register characteristics** | structured, dated, and checkable | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/) | `a6dabbbac96c428b...` | | **Data Fidelity Register core properties** | One place, on the organisation's own domain, where its key facts are published as structured data a machine reads directly, each fact bound to the public source it came from and sealed so anyone can confirm it is unchanged. | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/faq) | `5151c65ae35db467...` | | **Data Fidelity Register definition** | machine-readable, structured records gathering the facts an organisation publishes about itself | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/) | `9c5f9ae609f12a0b...` | | **Data Fidelity Register entry cryptographic sealing** | sealed cryptographically | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/) | `e1951c4c2d825335...` | | **Data Fidelity Register entry source binding** | bound to its original public source | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/) | `e1fab1433e9b5641...` | | **Data Fidelity Register publication location** | published on the organisation's own domain | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/) | `aa27150c4622ef25...` | | **Data Fidelity Register verification independent check** | can be verified independently by anyone, without having to trust us | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/) | `a453fa7da8858518...` | | **Independence of register verification** | needs nothing from us | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/how-it-works) | `66eef3f3de9a7bfa...` | | **Location of Apparat operator** | Paris | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/faq) | `99cef2c09b850a99...` | | **Number of fields in a cryptographic fingerprint seal** | 6 | fields | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/how-it-works) | `04ee834f9379d918...` | | **Operator of Apparat** | Thomas Meister | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/faq) | `50fd04c6dd0f61b5...` | | **Professional experience of Apparat operator** | 20 | years | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/faq) | `891058a1fa04021f...` | | **Public transparency log for release commitment** | Sigstore's Rekor | | | VERIFIED_FACT | Sigstore | [apparat-source-copy](https://derappar.at/faq) | `9e0b438dea1e355e...` | | **Role of Apparat** | verifies | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/how-it-works) | `b929e9fcf918d666...` | | **Steps to build a Data Fidelity Register** | 5 | steps | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/how-it-works) | `58a1385e02c77335...` | | **URL of Apparat own register** | dfr.derappar.at | | | VERIFIED_FACT | | [apparat-source-copy](https://derappar.at/how-it-works) | `9501c07bcb7c12bb...` | --- *Mathematical integrity guaranteed via Apparat SHA-256 seals.* *Release commitment anchored in Sigstore Rekor public transparency log — see release.json.* *Full machine-readable schema: https://dfr.derappar.at/ledger.json*