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

Block 18740

Hash
0000009cdb9d5d005824bb728cd103c230a4d7329e7515fa75828e1d71d271bb
Confirmations
23431
Time
2026-10-09 17:23:59 UTC
Median time
2026-10-09 17:15:46 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
767561d3731915684c617b2fad816d800b08378443e96befc76cbe139f55e74d
Previous block
0000007183af361cef75fe8444177f45bfcfae7f99b43264d7fdbe0341976cf4
Next block
000000f74799ee29eaf33792765c8c10faf0325df3fc813f0eca61ec9ee3121f

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 18740 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
af6d8eb280b05beb19fba4626be9a984… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
767561d37319…be139f55e74d coinbase1250