36ms median · in‑region
Compliance firewall for your logs.
Ed25519 signatures. S3 delivery. Never lose a log.
Features
Sign every log
Ed25519 signatures on every JSON log entry. Each receipt is self-contained proof with sequence, hash chain, and signature.
Never lose a log
S3 delivery with R2 purgatory fallback. If your storage is down, receipts buffer automatically. Zero data loss.
Verify without us
Stateless verification. All proof data embedded in the receipt. Verify server-side, client-side, or air-gapped.
Your storage, your data
Logs delivered to YOUR S3 bucket. Witness signs and sequences -- you maintain custody.
Try It
Quick Notarize
Or enter custom JSON
API Example
Complete Workflow
# 1. Initialize chain (once)
curl -X POST "https://api.solenoid.systems/v1/witness/sys/init" \
-H "Authorization: Bearer $SOLENOID_KEY"
# {"success":true,"publicKey":{"kty":"OKP","crv":"Ed25519","x":"..."},"createdAt":1706745600}
# 2. Notarize a log
curl -X POST "https://api.solenoid.systems/v1/witness/log" \
-H "Authorization: Bearer $SOLENOID_KEY" \
-H "Content-Type: application/json" \
-d '{"log":{"event":"user.login","userId":"u_123","ip":"203.0.113.1","ts":"2026-02-09T12:00:00Z"}}'
# {"version":1,"sequence_id":"1","chain_hash":"a1b2c3...","signature":"dGVzdA...","storage_status":"delivered"}
# 3. Verify the receipt
curl -X POST "https://api.solenoid.systems/v1/witness/verify" \
-H "Authorization: Bearer $SOLENOID_KEY" \
-H "Content-Type: application/json" \
-d '{"receipt":{...}}'
# {"valid":true,"checks":{"signature_valid":true,"content_hash_matches":true,"chain_link_valid":true}}Use Cases
Audit Trails
Tamper-evident log chains for compliance. Prove logs existed and weren't altered.
Regulatory Compliance
SOC2, HIPAA, and financial audit requirements with Ed25519-signed receipts.
Incident Response
Cryptographic proof that security logs are unmodified since capture.
Supply Chain
Track provenance with signed, sequenced records. Each entry links to the previous.
Comparison
| Approach | Solenoid Witness | Blockchain Timestamping | RFC3161 TSA |
|---|---|---|---|
| Tech | Ed25519 + Hash Chain | Bitcoin/Ethereum | X.509 PKI |
| Verification | Public JWK + client verifier | Public ledger | Certificate chain |
| Cost Model | Per-notarization | Gas fees | Per-timestamp |
| Latency | Sub-10ms | 10min-15min | 100-500ms |
| Pricing | $0.50/1K notarizations | $5-50/tx | $0.10-1/stamp |
| Best for: | Log integrity + compliance | High-value legal proof | Legal timestamping |
Latency and pricing as of Feb 2026