General use
Buying, retiring or claiming for any voluntary purpose.Recall active
An integrity event with a haircut is active: part of the credited tonnes is considered no longer backed.
Kariba REDD+ Project
Try to use this credit
See what the contracts say to a claimant, a seller and an integrator right now, next to what happened when the same calls were sent on-chain.
Simulated with eth_call against the live contracts. Nothing is sent.
Verdict for each use
CreditGate.check at block 50,154,778, vintage 2019Refused
CORSIA First Phase
Airline offsetting under ICAO CORSIA First Phase (2024–2026): eligible programme, vintage 2021–2026 and a letter of authorization on record.Recall active
An integrity event with a haircut is active: part of the credited tonnes is considered no longer backed.
RecallActivechecked at vintage 2019vintage 2021–2026, letter of authorization requiredevent 0x544ec2…08a6
Türkiye ETS offset
Offset use under Türkiye's emissions trading system: credits at most five years old, programme allowlist.Recall active
An integrity event with a haircut is active: part of the credited tonnes is considered no longer backed.
VCMI claim
Corporate claims under the VCMI Claims Code.Recall active
An integrity event with a haircut is active: part of the credited tonnes is considered no longer backed.
Integrity events
Every event ever opened for this project, oldest first. AI-proposed events are evidence for review, not findings: they act only after a reviewer countersigns or the dispute window closes.
Registry status proven: withdrawnRegistry, proven by zkTLS, 23 Oct 2026, 10:05 UTC
zkTLS- Proof hash
- 0x5f7f4d24…4025bae6
- Transaction
- 0xa5763725…8bc31e10
Registry withdrawalRegistry, proven by zkTLS, recorded 23 Oct 2026, 10:05 UTC
ActiveThe registry withdrew the project.
Active since 23 Oct 2026, 10:05 UTC.Over-issuance finding, 56.74% haircutAI oracle: notice reader, proposed 23 Oct 2026, 10:06 UTC
ActiveA published finding says more credits were issued than the project's reductions support. Confidence 100%.
Active since 23 Oct 2026, 10:06 UTC, after a reviewer countersigned.- Input hash
- 0x6991ac…63f25c30
- Model hash
- 0xf57880…03411556
- Output hash
- 0x215ced…bc3f9161
- Oracle attestation
- 0x21d2d0c3…242433fe
- Reviewer attestation
- 0xe9fe12f1…c16ca667
- Proposed in
- 0x9613b7af…0bfee420
- Evidence bundle
- a28f35fac5d3….jsonverify
ReviewReviewer's rationale: Verra's statement of 23 Sep 2025 reports 15,220,520 excess credits out of 26,822,953 issued; the oracle's haircut is that ratio. Countersign bundle
Reviewer: second attestation: recall activated0x117f0b95…4bc39878
Where the credits are
From issuance to claims, read from Verra's registry on 21 Oct 2026 and from the contracts now.
Issued
26,822,953credits in 221 batches, vintages 2011–2019
Still held
770,163listed on exchanges, while the gate refuses them
345,402in other registry accounts
632,972of the held credits treated as unbacked at 56.74%
Retired
21,956,710t in 6,929 retirements, all time
32,500t in the last 12 months (87 retirements), 98% with no public beneficiary
On-chain, now
No escrow orders or claims on this project yet.
Who retired them, last 12 months
| Beneficiary, as published by the registry | Tonnes | Retirements |
|---|---|---|
| Not disclosed | 31,715 | 12 |
| Garloc Transportes Logistica e Locações Limitada | 560 | 56 |
| K2 Project Forwarding | 114 | 3 |
| Circuito COP30 Surf Pará 2025 - Silvio Carlos Baia Santos - Praia Atalaia Salinópolis - Pará - Brasil | 50 | 1 |
| CarbonOff.co | 36 | 12 |
| William Demo de Moraes | 10 | 1 |
Names appear exactly as the registry publishes them; personal ID numbers are redacted. A name here says nothing about that buyer's conduct.
Registry proof
The project's status comes from Verra's own API response, proven with a zkTLS proof and verified inside RegistryOracle. The request it accepts is pinned byte for byte: URL, method, headers, body and the extraction pattern.
Project status
- Extracted fields
- projectId 902, stateCode WITHDRAWN, modifiedDate 2026-01-22T16:11:11
- Proven at
- 23 Oct 2026, 10:05 UTC
- Proof hash
- 0x5f7f4d24…4025bae6
- Authorization on record
- no letter of authorization in the registry record
- Submitted in
- 0xa5763725…8bc31e10
Retirements proven on-chain
3 t for CarbonOff.co9 Oct 2026
11963-371349619-371349621-VCS-VCU-352-VER-ZW-14-902-01012013-31122013-1Beneficiaries shown as published by the registry.
Satellite evidence
Sentinel-2 dry-season composites inside the boundary filed with the Verra registry, 2023 against 2025. The detector flags canopy loss pixel by pixel; Hansen Global Forest Change is the independent yardstick.
2023 dry season
2025 dry season
Detected lossdetected by the modelHansen loss the model missedno clear observationfalse colour: SWIR2 (B12) red channel, NIR (B08) green, red (B04) blue; forest = green, cleared or burnt ground = magenta / pink
What the detector found
2,261 hacanopy loss, 95% interval 1,927–3,756 ha (0.35% of forest)
361.3k tCO₂e at risk (IPCC Tier 1, 159.8 t/ha), interval 0–1.03M
Pre-registered rule met (validFraction >= 0.5 AND (lossPct >= 1.0 OR lossHa >= 1000)): Forest loss detected, 0.35% haircut proposed at 44% confidence.
Agreement with Hansen GFC here
0.04precision
0.38recall
0.08F1 (chance 0.001)
0.94ROC AUC
Detected 2,261 ha against 264 ha in Hansen; 99.9% of forest pixels had clear observations.
Reproduce it
- Model
- gradient-boosted trees (100 x 15 leaves), isotonic calibration, threshold 0.25
- Model sha256
- 0xa5d14fad…97a9157a
- Output hash
- 0x292fa175…c326cc3c
What public notices say
The notice reader extracts events from public statements. Every quote below occurs verbatim in the source document; outputs that cannot be traced to the text are rejected.
Verra Releases Results from Second Part of Quality Control Review of Kariba ProjectVerra, 30 Jun 2026
Registry withdrawalThe fact that Carbon Green Investments, the project proponent, withdrew the project from the Verra Registry during the QCR process prevented the VVBs from gathering new evidence pertaining to the time of their original assessment.
Kariba REDD+ project faces scrutiny after carbon credit integrity concerns and contract terminationTransparency International, 1 Jan 2026
Over-issuance finding, 57%In 2025, these concerns were formally validated when Verra concluded that approximately 57 per cent of issued credits were excess, primarily due to inflated deforestation baselines.
The Kariba REDD project reveals a deep structural flaw in Verra's carbon credit programmeREDD-Monitor, 3 Nov 2025
Over-issuance findingVerra estimated that it had issued 15.2 million “excess credits” to the project.
Verra states that 10.3 million of the excess credits have been used. A further 4.9 million excess credits from Kariba are unused within various accounts in Verra’s registry.
The Kariba REDD project reveals a deep structural flaw in Verra's carbon credit programmeREDD-Monitor, 3 Nov 2025
Registry withdrawalsince Carbon Green Investments has withdrawn the project from Verra’s registry it’s not clear whether this standard applies.
Since Carbon Green Investments has withdrawn the project from the Verra registry, there will be no future issuances for Verra to recover the excess credits.
Transactions
Everything sent on-chain about this project, including the calls the contracts refused on purpose.
| What | By | Result | Transaction |
|---|---|---|---|
| Registry status proven 902 WITHDRAWN RegistryOracle.submitProjectStatus | watcher | Accepted | 0xa5763725…8bc31e10 |
| Attestation OVER_ISSUANCE_FINDING 902 5674bps EAS.attest | oracle notice | Accepted | 0x9613b7af…0bfee420 |
| Attestation second attestation: recall activated EAS.attest | reviewer | Accepted | 0x117f0b95…4bc39878 |
| Claim recall active: over-issuance finding confirmed ClaimsLedger.registerClaim | relayer | Reverted | 0x1ded0017…ff97a682 |