Justin Chancellor
type: MusicGroup
description: Justin Gunnar Walter Chancellor (born 19 November 1971) is an English musician, best known as the bassist for rock band Tool, a position he has held since 1995. Prior to joining Tool, he played in a b
popularity: 14
followers: 21
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdc9043f91ebae2cf1af1c80f3e6ecf4d8239e7cd97d43b103a0f037cf5b3ae78
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953630
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953630
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/31dd6668-b53e-42af-9c48-da1202cdedda.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/31dd6668-b53e-42af-9c48-da1202cdedda.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/31dd6668-b53e-42af-9c48-da1202cdedda
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T12:06:27Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdc9043f91ebae2cf1af1c80f3e6ecf4d8239e7cd97d43b103a0f037cf5b3ae78","name":"Justin Chancellor","registered_at":"2026-06-14T09:42:18Z","symbol":"NIM0413373","token_address":"0x5fa0e5084a10f6279cced6cda59cf9e8ef4caee5","type":"artist","uuid":"31dd6668-b53e-42af-9c48-da1202cdedda"}
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 0xdc9043f91ebae2cf1af1c80f3e6ecf4d8239e7cd97d43b103a0f037cf5b3ae78. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31dd6668-b53e-42af-9c48-da1202cdedda.json and https://artists.proofprofile.net/proofs/artist/31dd6668-b53e-42af-9c48-da1202cdedda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T12:06:27Z
  text: {"copyright_id":"0xdc9043f91ebae2cf1af1c80f3e6ecf4d8239e7cd97d43b103a0f037cf5b3ae78","name":"Justin Chancellor","registered_at":"2026-06-14T09:42:18Z","symbol":"NIM0413373","token_address":"0x5fa0e5084a10f6279cced6cda59cf9e8ef4caee5","type":"artist","uuid":"31dd6668-b53e-42af-9c48-da1202cdedda"}