The carbon ledger testnet. Record, verify and retire every tonne of CO2e in public, on c0.
Earth
- Tweets 30
- Following 7
- Followers 200
- Likes 0
c0scan’s token is LIVE on @arc via @Arguspad. 🌱
Building a public carbon ledger for traceable records, accessible evidence, and transparent retirement history.
CA: 0x425dadccceb15e50360f04cf68e00794ff9bf4c9
c0scan.xyz
42
2
63
6,394
Net zero, on-chain. 🌱
1. Log your footprint: electricity, driving, flights, diesel
2. Retire the same amount of tCO2e
3. Watch "Net zero on c0" light up on your dashboard
A testnet run for now, so the flow is proven before it counts.
c0scan.xyz/dashboard
1
1
4
236
Speaks EVM. 🌱
c0 Testnet runs standard JSON-RPC, so viem, ethers, wagmi and MetaMask work out of the box. tCO2e is an ERC-20 with 3 decimals: 1 token = 1 tonne, 1 unit = 1 kg.
RPC: c0scan.xyz/rpc
Chain ID: 49198
Builders, come break things.
1
1
232
Season 0 so far 🌱
70,000+ blocks, one every 2 seconds
16 MRV records settled by the oracle
8 retirements, 235 t of test credits retired
Small numbers, all public, each one linked to a tx. Help us grow them: claim, record, retire.
c0scan.xyz/dashboard
2
3
242
Retire it. Share it. 🌱
Every retirement on c0 burns the tCO2e and creates a public certificate with its own link: who retired, how much, on whose behalf, in which block.
Retire a test tonne and drop your certificate below. We'll repost the first ones.
c0scan.xyz/dashboard
2
4
329
gm from the c0 ledger 🌱
Faucet's open, blocks every 2 seconds, oracle awake.
What are you recording today:
a commute, a flight, or a whole project?
c0scan.xyz
1
6
327
Checked in two blocks. 🌱
Every record on c0 goes to the MRV oracle. About 4 seconds later, its decision is settled on-chain as a signed transaction.
Over the plausibility cap? Flagged.
Evidence already claimed? Flagged.
See every decision: c0scan.xyz/scan
1
3
228
A token with a job. 🌱
What $C0 is planned for on c0:
→ vote on activity factors and oracle rules
→ stake to run an MRV verifier
→ pay registry fees on mainnet
Roadmap items, subject to change. The testnet stays free, with or without $C0.
c0scan.xyz/#token
1
6
280
10% held back. 🌱
When the c0 MRV oracle verifies a removal, 90% of the new tCO2e goes to the project and 10% goes to a buffer pool.
Forests burn. Soils dry out. Major registries keep a buffer for reversals, and c0 does it from block one.
c0scan.xyz/dashboard
2
4
304
444 missing documents. 🌱
Carbon Market Watch counted them in 2024 across 140 projects on four major voluntary registries.
A claim is only as strong as its paper trail. On c0, each record carries its evidence hash, oracle decision and owner, in public.
c0scan.xyz/scan
2
4
217
Liquidity, locked for good. 🌱
$C0 launched on @Arguspad :
the full 1B supply went into one Uniswap v4 pool paired with USDC, and the LP position sits in a locker contract with no withdraw function.
No bonding curve. No unlock schedule.
c0scan.xyz/#token
1
2
5
272
Your file stays with you. 🌱
When you attach evidence on c0, your browser hashes it with SHA-256. Only the hash goes on-chain; the file itself is never uploaded.
Change one byte later and the hash no longer matches.
Try it: c0scan.xyz/dashboard
1
1
9
348
−78%. 🌱
Voluntary carbon market volume fell from 516 Mt CO2e in 2021 to 111 Mt in 2023 (Frontiers in Blockchain, 2024).
When buyers can't check the record, they stop buying. c0scan puts the record in public: source, evidence, decision, retirement.
c0scan.xyz
6
254
New on c0scan.xyz
- a live $C0 burn tracker. 🌱
31.05M $C0 burned so far, 3.11% of the 1B supply. Each burn links to its @arc transaction, read from the chain every minute.
The roadmap is updated too:
Season 0 ✓ $C0 ✓ Next: holder link.
c0scan.xyz/#token
6
386
Counted once. 🌱
A carbon credit’s history should be easy to check, including its retirement status.
We’re building c0scan to make those records public and traceable, helping users spot duplicate claims.
Explore the testnet: c0scan.xyz
1
1
6
368
Scan every tonne. 🌱
We’re developing c0scan Explorer to make carbon records searchable, supporting evidence accessible, and retirement history easy to follow.
Explore the testnet and share your feedback:
c0scan.xyz
1
1
5
419
Trust starts with evidence you can inspect. 🌱
Explore how c0scan’s testnet connects project records, verification decisions, and retirement history in a public ledger.
Follow the record from its source.
Explore: c0scan.xyz
3
5
471
1 test carbon credit token = 1 simulated tonne of CO₂e. 🌱
Explore the carbon credit lifecycle on c0scan’s testnet, from issuance to retirement, with records you can inspect and trace.
Start exploring: c0scan.xyz
3
7
585