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

Block 18137

Hash
0000003bf32c29998cdbd70db9f680089fdd8001bd9aef571d28299bb52db02d
Confirmations
23989
Time
2026-10-09 00:40:11 UTC
Median time
2026-10-09 00:31:20 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0040172004
Bits
1e00f8ed
Merkle root
876c4e2521bf8b1c0013f16d79aed1deb46201bd7be3145d8d0eaca377cab9be
Previous block
00000020db849971112b07e45b6e8b1e5614065b63ed2302d31635b1cd1aaa78
Next block
0000005c30c391b8fc2acc752525b8bf4f813efc809fdda80b2a18976b19f8fa

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 18137 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
b2f3e97647e576cdabfe53cc8064b8c7… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
876c4e2521bf…aca377cab9be coinbase1250