Chum
type: MusicGroup
genre: surf rock
description: Chum may refer to: Broadcasting CHUM Limited, a defunct Canadian media company CHUM Radio, now Bell Media Radio, a Canadian radio broadcasting company CHUM (AM), a Toronto radio station CHUM-FM
popularity: 18
followers: 781
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xebfffc30fc475589cffa4c44ea5b2f51a068512bda00e49506e01dad7e5b378a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953727
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953727
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/901e71d2-435c-4734-8cdd-e71bf4c798ac.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/901e71d2-435c-4734-8cdd-e71bf4c798ac.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/901e71d2-435c-4734-8cdd-e71bf4c798ac
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T02:33:01Z
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 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 0xebfffc30fc475589cffa4c44ea5b2f51a068512bda00e49506e01dad7e5b378a. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/901e71d2-435c-4734-8cdd-e71bf4c798ac.json and https://artists.proofprofile.net/proofs/artist/901e71d2-435c-4734-8cdd-e71bf4c798ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T02:33:01Z
album: For Those About To Surf
  type: MusicAlbum
  date published: 2006-09-18
album: Downtown Beach
  type: MusicAlbum
  date published: 2007-08-20
album: Verbally Raped
  type: MusicAlbum
  date published: 2011-04-30
album: Fighting Words
  type: MusicAlbum
  date published: 2011-08-09