Carbon Arc Reserve credits
Arunachal Pradesh · Nagaland

Measured on the hillside. Paid to the farmer.

Carbon Arc measures the carbon held by trees on smallholder hill farms, proves every figure to verifiers with photos, GPS and satellites, and sends 60 to 70% of the carbon money to the farmers who grow the trees.

Open the field app See the auditor portal
Layered ridges fading into mist, with snow peaks of the Himalaya on the horizon Eastern Himalaya133 km · 6,850 m 95 km4,815 m 60 km3,730 m 5 km
West over the Ziro valley, Arunachal Pradesh, from a 2,634 m hilltop. Drawn from satellite elevation data, heights exaggerated 2.2 times.
One record, three ways in

Field teams collect it, verifiers check it, buyers see it.

Every tree, photo and payment is written once, on the phone that recorded it. The portal and the buyer pages read that same record, so nothing is retyped and nothing can drift.

For field teamsCarbon Arc dMRV

An app for a budget Android phone that works with no signal.

  • Record the village council’s consent and each farmer’s agreement
  • Walk plot boundaries with GPS, even under canopy
  • Measure trees in random 10 m boxes; weigh and pay for harvests by UPI
Open the field app →

For verifiers and managersCarbon Arc Auditor Portal

Every plot on one map, with its evidence a click away.

  • Trees, photos, satellite checks and payouts for each plot
  • Re-draw the sample boxes and re-measure trees blind
  • Download a sealed audit bundle and registry exports
Open the auditor portal →

For buyersCarbon Arc Carbon

Credits from named villages, with the evidence behind them.

  • Reserve credits from upcoming projects at no cost
  • Read each project’s locked, verified data
  • See what farmers were paid on the public ledger
Reserve carbon credits →
How a credit is made

From village consent to verifier, in one chain of evidence.

Each step leaves a record the next step depends on, so nothing reaches a registry without its consent, boundary and measurements attached.

  1. Consent

    The village council’s free, prior and informed consent (FPIC) resolution is photographed and dated; no plot counts as ready without it.

  2. Enrol

    Farmers keep their land. Tenure proof and a signed benefit-sharing agreement are captured on the phone.

  3. Map

    Boundaries are walked with averaged GPS, even under canopy. Overlaps above 1% are refused.

  4. Measure

    Random 10 m boxes inside each plot. Trunk diameter (DBH), height and species for every tree, tagged with QR.

  5. Monitor and verify

    Satellite checks every five days, then a sealed bundle for the verifier.

Audit trail

Built so a verifier can check it, not just trust it.

Live-camera evidence
Photos come only from the camera, stamped with time and GPS and hashed with SHA-256 the moment they are taken.
Re-drawable sampling
Sample boxes are placed by a generator seeded with the plot id, so an auditor can re-create exactly the same boxes.
One carbon formula
Chave et al. (2014) allometry runs identically on the phone and in the database, so field and registry figures agree.
Sees through the monsoon
Sentinel-2 vegetation index plus Sentinel-1 radar, which reads canopy through cloud, with fire alerts from NASA FIRMS.
Sealed audit bundle
Boundaries, trees, photos, satellite series and payouts in one ZIP with a SHA-256 manifest; every photo’s hash is listed in the media manifest.
Works with no signal
Everything is recorded offline on a budget Android phone and synced when the team is back in range.
Carbon pathways

Each land type has a registry pathway.

Plan Vivo
Zone A · community forest

Community forest protection, the standard behind Northeast India’s first community forest carbon project in the Khasi Hills.

Verra VM0047
Zones B and C · farm trees

Trees on agroforestry, shade-spice and timber plots, measured by census and sample boxes.

Global Artisan C-Sink
Biochar

Biochar from crop residue, with Puro.earth as the alternative route.

These are the app’s default pathways. Each project is confirmed with its registry before listing.

Farmers first, by design.

  • Land is enrolled, never acquired. Consent can be withdrawn at any time.
  • Payouts for shade spices (cardamom, pepper, coffee, turmeric, ginger) go straight to the farmer’s UPI.
  • Every sack is weighed, photographed and QR-tagged, so each payout traces back to its harvest.