Brand Guide — v0.1

Every AI decision
deserves a receipt.

Ink Receipts is an open developer platform for issuing portable, cryptographically verifiable receipts for AI decisions.

Built on the BIL Kernel, every receipt captures exactly what happened, when it happened, why it happened, and how it can be verified.

Issue once · Verify anywhere.

Traditional logs tell you what a system claims happened. Ink Receipts produce evidence that can be independently verified — for banking, insurance, healthcare, legal proceedings, compliance, and regulated enterprise software. Edit the record below and watch the kernel produce one in front of you.

Decision Record

load

{
  "schema_version": "ink.record.v0.1",
  "institution": "live-oak-example",
  "workflow": "sba-loan-decision",
  "decision_id": "dec_001_sba_2026_06_27",
  "timestamp": "2026-06-27T14:22:31Z",
  "subject_ref": "applicant:acct_8821",
  "inputs": [
    {
      "name": "credit_report",
      "ref": "sha256:0a1b…7c"
    },
    {
      "name": "tax_returns_3y",
      "ref": "sha256:9f3e…42"
    },
    {
      "name": "cash_flow_model",
      "ref": "sha256:b7c1…99"
    }
  ],
  "model_ref": {
    "name": "underwriting.gbm",
    "version": "2026.04"
  },
  "policy_ref": {
    "name": "sba.7a.guidelines",
    "version": "2026.04"
  },
  "controls": [
    {
      "id": "ecoa.notice",
      "status": "asserted"
    },
    {
      "id": "kyc.check",
      "status": "asserted"
    },
    {
      "id": "ofac.screen",
      "status": "asserted"
    }
  ],
  "outcome": {
    "kind": "Approved",
    "amount": 425000,
    "currency": "USD",
    "rationale": "DSCR 1.42, FICO 742, collateral coverage 1.6x"
  }
}

JSON · edits flow downstream on every keystroke

Pipeline

record → canonical → hash → receipt → bundle → verify

canonical bytes

—

record_hash

—

ink receipt

—

bundle_hash

—

verify

—

profile: banking.sba.v0.1

Waiting for a valid record…

Tamper Test

flip one field after sealing → verifier flips to FAIL

No tamper run yet. The bundle above is intact.

What is an Ink Receipt?

A portable evidence artifact for a single decision.

Instead of asking “Can we trust this output?” you can ask “Can we reconstruct exactly how this output was produced?”

Each receipt is designed to move between organizations — a bank can issue it, an insurer can verify it, an auditor can inspect it, a regulator can replay it, a court can evaluate it — with no access to the original system.

Each receipt can include

request
response
model identity
prompt hash
policy references
timestamps
signatures
evidence chain
verification metadata

Why developers like it

Milliseconds

Issue receipts in milliseconds.

Anywhere

Verify them anywhere.

Any store

Store them anywhere.

No chain

No blockchain. No centralized trust.

let receipt = ink.issue(decision)?;

receipt.verify()?;
receipt.export_json()?;
receipt.sign()?;

Built on the BIL Kernel

An open runtime for institutional evidence.

The BIL Kernel is the open-source runtime that powers Ink Receipts. It provides a minimal, deterministic evidence layer for institutional software — so developers build on one common substrate instead of inventing a new receipt format for every application.

The result is portable evidence rather than application-specific logs.

BIL Kernel on GitHub ▸

Core primitives

Identity
Time
Event
Value
Obligation
Evidence
State

Beyond logging

Logs are operational.

They answer: Did the service run?

Receipts are evidentiary.

They answer: Can an independent third party verify the decision?

Ecosystem

                 Applications
                       │
       Banking · Insurance · Legal · AI
                       │
               Ink Receipts SDK
                       │
                BIL Kernel (OSS)
                       │
   Identity · Time · Event · Evidence

Three layers, one substrate.

BIL KernelOpen-source infrastructure. The neutral, reusable foundation.
Ink ReceiptsDeveloper platform — SDKs, CLI, APIs, hosted verification, integrations.
BankabilEnterprise decision infrastructure for regulated institutions.