Roll Call
type: MusicGroup
genre: hardcore
genre: hardcore punk
description: thumb|Senator Tim Wirth reading an issue of Roll Call in 1991 Roll Call is a newspaper and website published in Washington, D.C., United States, when the United States Congress is in session, reporti
popularity: 2
followers: 802
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x22aca360b63a59529951caa21505ace6188f089381bbf11a2f160d194c570e40
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954647
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954647
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d6487fc6-19c7-450b-8f2a-a83cc5977944.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d6487fc6-19c7-450b-8f2a-a83cc5977944.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d6487fc6-19c7-450b-8f2a-a83cc5977944
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:36:58Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x22aca360b63a59529951caa21505ace6188f089381bbf11a2f160d194c570e40","name":"Roll Call","registered_at":"2026-06-21T03:07:11Z","symbol":"NIM1797349","token_address":"0x59f3210bd7edc029393a631406893ffbe08bd6f4","type":"artist","uuid":"d6487fc6-19c7-450b-8f2a-a83cc5977944"}
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 0x22aca360b63a59529951caa21505ace6188f089381bbf11a2f160d194c570e40. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6487fc6-19c7-450b-8f2a-a83cc5977944.json and https://artists.proofprofile.net/proofs/artist/d6487fc6-19c7-450b-8f2a-a83cc5977944.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:36:58Z
  text: {"copyright_id":"0x22aca360b63a59529951caa21505ace6188f089381bbf11a2f160d194c570e40","name":"Roll Call","registered_at":"2026-06-21T03:07:11Z","symbol":"NIM1797349","token_address":"0x59f3210bd7edc029393a631406893ffbe08bd6f4","type":"artist","uuid":"d6487fc6-19c7-450b-8f2a-a83cc5977944"}
album: Perpetuate
  type: MusicAlbum
  date published: 2022-10-07
album: Perpetuate
  type: MusicAlbum
  date published: 2022-10-07
album: Perpetuate
  type: MusicAlbum
  date published: 2022-10-07
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  type: MusicAlbum
  date published: 2023-07-20
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  type: MusicAlbum
  date published: 2024-08-06