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

Block 18876

Hash
00000078e6270d383680ee2fd085dbd31355b37f0fb607a9a9f3f407cd651bff
Confirmations
23227
Time
2026-10-09 21:09:47 UTC
Median time
2026-10-09 21:01:26 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
5820a12dd45cdba59391c516830098e2e81867b065ce05a25cf4bc11d5180933
Previous block
000000ea2c3dc92708344492e07f20da6cafa6dd9cd3286c3b34a5074a8106bd
Next block
000000d10e5000c6f5a83f1e75d3e82937a25ab9d3d441bcaa4b51b984df7943

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 18876 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
3c7b82e6592255d6479fcdc47b2e2b69… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
5820a12dd45c…bc11d5180933 coinbase1250