Concrete
type: MusicGroup
genre: horrorcore
description: thumb|A single concrete block, as used for construction Concrete is a composite material composed of aggregate bound together with a fluid cement that cures to a solid. It is the second-most-used sub
popularity: 36
followers: 693
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfb34314930076f3b75d0e8837262727ada6079e3370bde376b539c0a6b8d976d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953423
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953423
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d37b91aa-4c49-4d47-99e7-56db8a8037b0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d37b91aa-4c49-4d47-99e7-56db8a8037b0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d37b91aa-4c49-4d47-99e7-56db8a8037b0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T21:20:00Z
additional property: OTSCanonicalRecord
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb34314930076f3b75d0e8837262727ada6079e3370bde376b539c0a6b8d976d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d37b91aa-4c49-4d47-99e7-56db8a8037b0.json and https://artists.proofprofile.net/proofs/artist/d37b91aa-4c49-4d47-99e7-56db8a8037b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
album: Concrete EP
  type: MusicAlbum
  date published: 2001
album: Blasphemer
  type: MusicAlbum
  date published: 2008-10-30
album: We Are All Subculture Street Troopers
  type: MusicAlbum
  date published: 2014-04-09
album: Subculture Street Trooper
  type: MusicAlbum
  date published: 2014-08-18
album: Drink Freak (feat. Jordan Harris & Brick Bax)
  type: MusicAlbum
  date published: 2017-09-09