Callum Tam
type: MusicGroup
popularity: 2
followers: 54
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x819a38ab3e165294baa903190f07ee450340706565868df0c29aaf1c7ba674b2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ee0cce6a-987c-47c0-97aa-e0370a5ba8ba.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ee0cce6a-987c-47c0-97aa-e0370a5ba8ba.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ee0cce6a-987c-47c0-97aa-e0370a5ba8ba
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x819a38ab3e165294baa903190f07ee450340706565868df0c29aaf1c7ba674b2","name":"Callum Tam","registered_at":"2026-06-21T11:32:56Z","symbol":"NIM1912242","token_address":"0xd27594eb8b9f52b59288aa84620c3380c9a911ac","type":"artist","uuid":"ee0cce6a-987c-47c0-97aa-e0370a5ba8ba"}
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 0x819a38ab3e165294baa903190f07ee450340706565868df0c29aaf1c7ba674b2. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee0cce6a-987c-47c0-97aa-e0370a5ba8ba.json and https://artists.proofprofile.net/proofs/artist/ee0cce6a-987c-47c0-97aa-e0370a5ba8ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0x819a38ab3e165294baa903190f07ee450340706565868df0c29aaf1c7ba674b2","name":"Callum Tam","registered_at":"2026-06-21T11:32:56Z","symbol":"NIM1912242","token_address":"0xd27594eb8b9f52b59288aa84620c3380c9a911ac","type":"artist","uuid":"ee0cce6a-987c-47c0-97aa-e0370a5ba8ba"}
album: Time Moves Too Fast for My Liking
  type: MusicAlbum
  date published: 2024-03-09
album: Is It a New Year Already?
  type: MusicAlbum
  date published: 2025-01-22
album: Ferry Ride
  type: MusicAlbum
  date published: 2025-03-01
album: The Happy Songs
  type: MusicAlbum
  date published: 2025-07-26