Strike Under
type: MusicGroup
description: Strike Under was an influential Chicago punk rock band of the early 1980s. It was started by Steve Bjorklund (singer-guitarist) after the demise of his previous band, The Rabbits. The principal musici
popularity: 4
followers: 764
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x53b0d2d7322440399e9360fcd02f72b23e5f4c858bd2be9ee552e80e4c0a58e2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954689
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954689
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e359a657-a91a-4e7d-9219-207cb39edfbf.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e359a657-a91a-4e7d-9219-207cb39edfbf.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e359a657-a91a-4e7d-9219-207cb39edfbf
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T10:35:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x53b0d2d7322440399e9360fcd02f72b23e5f4c858bd2be9ee552e80e4c0a58e2","name":"Strike Under","registered_at":"2026-06-21T07:20:24Z","symbol":"NIM1860218","token_address":"0x637191cf06b487f3b4004012f30bcc06237d16e1","type":"artist","uuid":"e359a657-a91a-4e7d-9219-207cb39edfbf"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b0d2d7322440399e9360fcd02f72b23e5f4c858bd2be9ee552e80e4c0a58e2. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e359a657-a91a-4e7d-9219-207cb39edfbf.json and https://artists.proofprofile.net/proofs/artist/e359a657-a91a-4e7d-9219-207cb39edfbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T10:35:31Z
  text: {"copyright_id":"0x53b0d2d7322440399e9360fcd02f72b23e5f4c858bd2be9ee552e80e4c0a58e2","name":"Strike Under","registered_at":"2026-06-21T07:20:24Z","symbol":"NIM1860218","token_address":"0x637191cf06b487f3b4004012f30bcc06237d16e1","type":"artist","uuid":"e359a657-a91a-4e7d-9219-207cb39edfbf"}
album: Immediate Action
  type: MusicAlbum
  date published: 2020-06-01