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

Block 18261

Hash
000000f7cd2f407e79698d26557014810205f9fc7c4ef11b605490d60c7c32bd
Confirmations
22375
Time
2026-10-09 04:07:53 UTC
Median time
2026-10-09 03:59:56 UTC
Transactions
2
Size
3,084
Weight
11,826
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
8fea0db5e053b63e5acbf4b1e6bafa44a0d114017455d23749944fc28cea3611
Previous block
0000002b45d663be0ae26726dd18587c490949d437ac1c59a1c42dd0b19b49a7
Next block
0000002c329bde8a60a0228be9f136302321a8b634f1ebcff9c1f83e7f371b72

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 18261 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
1d63d67487e98741ee6735a5fb6c6638… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
988fcc297adb…e9814423a8fd coinbase1250.0000212
78ea08a889a0…01f015d0de73 pays to P2MR220.017020640.0000212