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Evidence Compliance Guide

Using SoftQCOS Evidence for regulatory compliance and legal proceedings.

Use Cases​

SoftQCOS Evidence is used to create quantum-signed, tamper-proof evidence for:

  • Legal proceedings — Court-admissible digital evidence
  • Insurance claims — Timestamped proof of events
  • Regulatory audits — Unalterable compliance records
  • Fraud investigations — Chain-of-custody documentation
  • IP protection — Proving creation date of intellectual property

Creating Legally Admissible Evidence​

Capture Evidence at the Moment of Event​

from softqcos.evidence import EvidenceClient
import datetime

client = EvidenceClient(api_key="your-api-key")

bundle = client.create_bundle(
    description="Contract signing — Acme Corp — 2026-03-23",
    metadata={
        "case_ref": "ACME-2026-001",
        "jurisdiction": "EU",
        "event_type": "contract_execution",
        "parties": ["acme-corp", "softquantus-ltd"]
    }
)

# Add files to the bundle
bundle.add_file("contract_signed.pdf")
bundle.add_file("identity_verification.json")
bundle.add_screenshot(url="https://signing.acme.com/session/abc123")

# Seal and anchor with quantum entropy
sealed = bundle.seal()
print(f"Bundle ID: {sealed.bundle_id}")
print(f"Quantum Fidelity: {sealed.quantum_fidelity}")
print(f"Anchored at: {sealed.anchored_at}")

Chain of Custody​

Track who accessed evidence and when:

# Log every access to the evidence bundle
client.log_access(
    bundle_id="evb_abc123",
    accessor="investigator@lawfirm.com",
    purpose="case_review",
    access_type="read"
)

# Export chain of custody report
custody_report = client.export_custody_report(bundle_id="evb_abc123")
custody_report.save("chain_of_custody.pdf")

Compliance Frameworks​

FrameworkHow Evidence Helps
eIDAS 2.0Qualified electronic signature evidence with timestamp
GDPR Art. 30Records of processing activities
ISO/IEC 27037Digital evidence identification and collection
NIST SP 800-101Guidelines on mobile device forensics
RFC 3161Trusted timestamping standard

Export for Regulators​

# Export a complete evidence package for regulatory submission
softqcos evidence export \
  --bundle-id evb_abc123 \
  --format regulatory \
  --include-verification-certificate \
  --output regulatory-submission.zip

The exported package includes:

  • All evidence files (original, unmodified)
  • Quantum entropy attestation certificate
  • ML-DSA-65 signature verification data
  • Independent verification instructions

SoftQCOS Evidence bundles can be accompanied by a Quantum Attestation Declaration — a signed statement from SoftQuantus confirming:

  1. The quantum entropy source and fidelity score
  2. The timestamp of anchoring
  3. The cryptographic algorithm used
  4. That the bundle has not been modified

Contact legal@softquantus.com to request an attestation declaration for legal proceedings.