c2pa-verify

Takes one media file by URL or inline base64 and reads its C2PA manifest store.

Takes one media file by URL or inline base64 and reads its C2PA manifest store. The answer says whether a manifest is present at all, whether the cryptographic checks pass — every failing check is returned with its code and explanation, so a hash mismatch on the image data is distinguishable from a broken claim signature — who the signing certificate names as issuer, its serial number, the signing algorithm and the signing time, the chain of ingredients a derived file inherited from, and every…

UNRATEDDelisted

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.002 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x2880edff…771c4e5e

URL

https://medien.halowerk.com/v1/c2pa-verify

Seen

first 34 days ago · last 24 days ago

33 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.1

UN
RATED

0.341 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by liveness · gap to 1.000 is 0.659: 0.124 uncertain ? + 0.535 short ? · 0.109 to D

How the composite of 0.341 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
livenesscosts the most it answered at all	0.60	0.34	0.170		0.102	−0.394	−0.104
latency p95 it answered as fast as its class	0.20	0.29	0.195		0.039	−0.141	−0.020
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.341	gap to 1.000 = 0.659 · 0.535 short · 0.124 uncertain	0.341	−0.535	−0.124

Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check

The multiplication, written out

  0.600 × 0.170   liveness       
+ 0.200 × 0.195   latency p95    
+ 0.200 × 1.000   price stability
= 0.341           → UNRATED: 32 of 30 paid calls      weights 2026.09.1 · 32 samples · seed cap_01M1A5QFPTHPXB82H4ANJKTFB8|2026-08-17T22:13:58.908Z|2026.09.1

Verify it yourselfnpx teppi-check https://medien.halowerk.com/v1/c2pa-verifycurl -s https://api.teppi.xyz/v1/trust/cap_01M1A5QFPTHPXB82H4ANJKTFB8