Different Approaches to Digital Proof
Not all proof platforms work the same way. Here's how the major approaches compare.
Four Main Approaches
Each approach has trade-offs. The right choice depends on your needs.
Blockchain-Only Platforms
Hash content and anchor it to a blockchain (Bitcoin, Ethereum, or proprietary chains).
Traditional TSA (RFC 3161)
Timestamps from accredited Time Stamp Authorities following IETF standards.
C2PA / Content Credentials
Industry coalition standard for media provenance (Adobe, Microsoft, Intel, etc.).
Multi-Layer Architecture
Combine RFC 3161 timestamps with blockchain anchoring for redundant verification.
How CertNode Works
Multi-layer timestamp architecture for maximum reliability.
Signature Layer
- • ES256 (ECDSA P-256) on AI-Provenance receipts
- • HMAC-SHA256 integrity seal on commerce records
- • Tamper-evident: any change breaks it
- • Provenance signatures verifiable with the public key
RFC 3161 Timestamps
- • IETF standard since 2001
- • Independent TSA (FreeTSA)
- • Instant verification
- • Established legal precedent
Bitcoin Anchoring
- • OpenTimestamps protocol
- • Merkle roots every ~10 minutes
- • Blockchain-level permanence
- • Independent of CertNode
Result: Every CertNode receipt carries an ES256 signature plus an RFC 3161 timestamp from an independent authority and a Bitcoin anchor — three independent verification paths.
Quick Comparison
| Consideration | Blockchain-Only | Traditional TSA | C2PA | Multi-Layer |
|---|---|---|---|---|
| Timestamp speed | 10+ min | Instant | Instant | Instant |
| Legal precedent | Emerging | Established | New | Established on the RFC 3161 layer |
| Decentralization | Full | Centralized | Varies | Hybrid |
| Content types | Any hash | Any hash | Media files | Any content |
| Verification paths | 1 | 1 | 1 | 3 |
When to Use What
Choose blockchain-only if:
- • Decentralization is your top priority
- • You can wait for confirmation
- • You're in crypto-native industries
Choose traditional TSA if:
- • Legal compliance is critical
- • You need instant verification
- • You're in regulated industries
Choose C2PA if:
- • You work primarily with images/video
- • Edit history tracking matters
- • You use Adobe/Microsoft tools
Choose multi-layer (CertNode) if:
- • You need both speed and permanence
- • Redundancy matters for disputes
- • You want multiple verification options
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