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

Block 18219

Hash
000000c1d58c4b783599379baf5f6809446394cd31fa07c321c91b65bba0c2bc
Confirmations
23903
Time
2026-10-09 02:57:37 UTC
Median time
2026-10-09 02:49:13 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
bd5281f3f93e1c1cfda6ec1d3776607294449a7b47de8972ac8615921cbd1a58
Previous block
000000b4349c530fcd0790ca2374a7dcfe6b969c5b0800c285ce720fdd421c9a
Next block
0000007bb7280374846ff65bd59af7e18b42dcade69f5c9ec54e1f406fa6eff8

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 18219 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
6a224a8288ab99397a9f7b486bbd680f… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
bd5281f3f93e…15921cbd1a58 coinbase1250