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

Block 18872

Hash
000000ffedef1f60c227013d7990193b72000f64914b84342094f925fa3258b5
Confirmations
23338
Time
2026-10-09 21:02:59 UTC
Median time
2026-10-09 20:54:56 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
0574d25bcd5fff697d064e7478ec2e4abeb1e1ef025f86b05e20584b1aaf3ce2
Previous block
00000103d5a36fe309b812828b5e5b10b9bce603d2fddbbf7a09cc613ca392ae
Next block
000001189e212ac661428de639d7c69a383186b3fa49dfc4e89676f642450e15

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 18872 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
cd114e96ee4e8d4a5f8588daf8d79e2f… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
0574d25bcd5f…584b1aaf3ce2 coinbase1250