Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 18543

Hash
0000005e11d781de6801b0c95bc9f17d87ed9476d8a2df408081bfeea89887d7
Confirmations
22356
Time
2026-10-09 12:00:21 UTC
Median time
2026-10-09 11:51:49 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
20b9236634c0cebbd5d6f23818583ce641713a4418aef92f1405fb61b2364e37
Previous block
000000757230680cbe709ff4aba9f050a6d443b0bc7ed1f10c0ac903e1c12cac
Next block
000000fcbaa811d078a65038c79f389e0a6adff5c9ebfcecdfc1f2329e808a8c

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 18543 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
f843313b4f78db9fd3002d63a757f0a4… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
20b9236634c0…fb61b2364e37 coinbase1250