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

Block 18626

Hash
00000009f53b6a64436c826f7a034a58c31350c238a4b6202307d75ca8ddb1e4
Confirmations
22336
Time
2026-10-09 14:16:33 UTC
Median time
2026-10-09 14:08:27 UTC
Transactions
2
Size
2,977
Weight
11,596
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
92821f2cb4862efe9bd5028d688e3a62db473edb4592ae37db8adae375510ea7
Previous block
0000001803c8da29b3575e11c0d6324f6dad3d1c18ecbb6ffffffae3f32e2330
Next block
00000014b699cff737e4242c2e076581437aec8d3b7c1ee7582485cb667697c2

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 18626 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
c2b356b666811e9a35e60d072a9e1ed2… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
15b7d17750ce…6cab435bbe3b coinbase1250.0000031
5ae24b93ae64…e9330aa80a23 pays to P2MR1240.99996880.0000031