Libraries tagged by provenance

Verifier for C2PA Content Credentials in pure PHP: JPEG, PNG, GIF, WebP, ISOBMFF (MP4, MOV, AVIF, HEIC), WAV, AVI, MP3 and FLAC, and plain text when turned on, with c2patool's verdict. Read and verify only; no signing, no keys, no network.

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Content provenance and signing for TYPO3 — Ed25519 digital signatures, audit trail, AI content tracking, and verification API.

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PHP library for C2PA Content Credentials: build, sign, read and verify manifests, with machine-readable marking of AI-generated content (EU AI Act, Article 50).

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Shared, provenance-aware AI pricing and cost attribution for Laravel applications.

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SLSA Provenance predicates (v1 and v0.2) for PHP

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Store machine, human, and source assertions as append-only claims with confidence, basis, and provenance.

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Omnicrawl: fetch and extract web pages under any PHP host, through crawling services or directly, responsible by default - the target site's rules applied by the family itself before any service is called. robots.txt read and honoured per RFC 9309 for the family's own token, a usage policy per target site declared as data (allowed or refused, on what authority, with a reference and a date, its rate limits, what may be stored and republished) and a conservative default for the others (single pages for previews, no crawl run), an identified User-Agent required by every factory, per-host limits through omnisense/contracts' PolicyGuard beside the provider's own, X-Robots-Tag, meta robots and TDMRep reservations honoured, provenance on every record. Three contracts: page-fetch, extract (metadata, Open Graph, JSON-LD, selectors), crawl-runs. A direct fetcher built in; omnicrawl/apify, omnicrawl/firecrawl, omnicrawl/scrapingbee, omnicrawl/zyte as packages of their own, none of their evasion features exposed.

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Build, sign and verify in-toto attestation Statements (v1 and v0.1) in PHP

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Composer plugin that verifies GitHub build-provenance attestations for the packages you install

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PHP implementation of the W3C Provenance Data Model (PROV-DM)

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Tamper-evident receipts for AI inference calls: SHA-256 hash chain, RFC 8785 JCS canonicalization, Ed25519 signatures. Pure PHP, zero framework dependencies. EU AI Act Article 12 / NIST AI RMF aligned.

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Headless calendar engine for Laravel: register, calculate, compare and govern indigenous and custom calendars. Ships a complete arbitrary-length cyclic driver, versioned and auditable definitions, safe rules and observances, Unicode-exact terminology, provenance tracking and tenant isolation.

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Universal lexicographic engine for Laravel: languages, varieties, orthographies, lexemes, forms, senses, multilingual definitions, provenance and Unicode-exact, tone-aware search for any human language.

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How a work was made, declared part by part in the IPTC Digital Source Type vocabulary: captured, made by people, edited or created with generative AI, or undeclared, with the AI-free view and the requirement a contest or a shop sets

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Build Sigstore bundles (.sigstore.json) in PHP — the counterpart to verification, emitting DSSE and message-signature bundles

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