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Provr

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Open cryptographic media manifest standard for professional production workflows

The Provr specification defines the normative file format for forensically-verifiable media manifests. v1.0 ratification-quality campaign in progress.

Repo: github.com/hijackr-dev/provr Category: Provr format Focus since: 2026-04-23
92%
172 / 186 tasks completed
Dev text complete — Pre-Corpus Audit Campaign is the next gate
Current task
Phase 0 — Polish pass (pre-campaign)
In progress 0%

Dev text is done; close known-pending polish items then start Round 1.

Next task
Round 1 — Assumption audit

First of 24 campaign rounds before corpus regeneration.

Tasks
172 / 186 tasks completed 92%
v1.0 spec + schema items closed (excl. v1.1 deferrals)
  1. SPEC-152 Optional transparency-log attestation (v1.1 / v1.2 consideration)

    proof alongside the existing DID (or X.509) signature would provide a strong additional trust signal — "signed by did:web:studio.example AND recorded immutably in a public log at time T." Orthogonal to the identity model, not a replacement for it: a transparency-log entry anchors the moment of signi

    Closed: ** —
  2. SCHEMA-2 Deep C2PA structural integration (v1.1 candidate)

    gaps. v1.1 deepens the integration further: provr's verifier parses the JUMBF payload, validates C2PA signed claims against provr DIDs, and produces a unified trust statement combining both provr and C2PA verification. Bidirectional cross-references between provr custody events and C2PA assertions.

    Closed: ** —
  3. VAL-2 Independent spec interpretation verification

    no existing fixture derivations) to an independent reviewer and ask them to derive one fixture's fields and the inputs to each BLAKE3 call from spec prose alone. Compare the independent derivation against the generator's output.

    Closed: ** —
  4. VAL-4 Public review call

    invitation for outside technical reviewers to re-derive any fixture from the spec and flag disagreements. Part of v1.0 release preparation.

    Closed: ** —
  5. DOC-2 Resolve `cli/PROJECT_SPEC.md` — duplicate of `core/PROJECT_SPEC.md`

    `core/PROJECT_SPEC.md` (currency review finding C-6, 2026-04-13). The file exists as an identity contradiction: the workspace treats `core/` and `cli/` as separate crates with separate concerns, but they share a single spec file with no differentiation. Three resolution options:

    Closed: ** —
  6. DOC-3 Architecture review of SPEC-48 resolution and LockReceipt handling

    four-layer resolution against the actual codebase once Rust scaffolding exists.

    Closed: ** —
  7. DOC-9 Conformance corpus completeness — missing binaries and stubs

    across known-good, known-bad, and corpus sections. As of SESSION-0027, 13 of those have no corresponding binary file on disk:

    Closed: ** —
  8. DOC-11 §8.2.1 fastcdc crate pin refresh

    toolchain reference for chunk-boundary computation. Version 4.0.0 was released 2026-04-11 and is a candidate successor. Before updating the normative pin, two conditions must be verified:

    Closed: ** —
  9. DOC-12 Publish public Provr whitepaper (`docs/WHITEPAPER.md`)

    intended for ASC ADC, SMPTE RDD submission, camera manufacturer engagement, and studio technical executives. Replaces the stale `Provr_Media_Manifest_v1.0_Overview.pdf` (deleted in commit `0e761ba`, content preserved at `~/hijackr/Notes/provr/whitepaper_v1.md`).

    Closed: ** —
  10. RELEASE-3 Legal consultation on software liability and licensing

    once before provr is used in any commercial context or legal dispute.

    Closed: ** —
Showing 10 of 14 open items
Pre-Corpus Audit Campaign rounds PRE_CORPUS_AUDIT_CAMPAIGN.md §13.1
0 / 24 closed 0%
Metrics
SPEC items closed
153 / 153 v1.0
SCHEMA items closed
6 / 6 v1.0
DOC items closed
5 / 9
RELEASE items closed
5 / 10
Audit rounds complete
0 / 24
Sessions completed
47
Estimated sessions to ratification
70–100
Total commits
274
v1.x deferrals
SPEC-152, SCHEMA-2 — not counted in v1.0
Remaining v1.0 gates
Audit campaign · Corpus · 3 reviews · legal
Milestones (1 / 8)
  • ✓ SPEC items closed 2026-04-23
  • Pre-Corpus Audit Campaign — Polish
  • Pre-Corpus Audit Campaign — 24 rounds
  • Market-fit review (Phase A)
  • Conformance corpus (DOC-9)
  • RELEASE-8 external review
  • RELEASE-9 cryptographic review
  • v1.0 public ratification
Commit activity
117 commits · 7d 274 commits · 30d 274 commits · all time
Last commit 6h ago · Apr 23, 2026, 1:08 PM
  1. f4872e8 chore(docs): point state file at Pre-Corpus Audit Campaign Phase 0 6h ago
  2. 6f73d26 docs(ledger): note SPEC-151 identity-block extension in ledger rationale 10h ago
  3. c46cb2e spec: optional X.509 signer identity alongside DIDs end-to-end 10h ago
  4. c0b920b chore(docs): tidy CURRENT_SESSION_STATE after SESSION-0046 closures 20h ago
  5. c69bf7d spec: flesh out Appendix A display templates for every SHALL-display gap 20h ago
  6. 8b2587b spec: surface C2PA ingredient graph in the verifier display 20h ago
  7. db103c0 spec: surface C2PA redaction events in the verifier output 20h ago
  8. bb53949 spec: C2PA 2.3 Depth-2 signature validation at forensic and attested 20h ago
  9. 633d8b4 spec: split WARN_CUSTODY_GAP into twelve specific exit codes 20h ago
  10. 2766298 chore(docs): SESSION-0046 C2PA 2.3 audit absorbed into SPEC-150; SPEC-154 + SPEC-155 filed 20h ago