Jeff Hammer
type: MusicGroup
popularity: 5
followers: 153
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6084417045be4142d5c52cb0518ba3bb7e604ff648b42cb9be66b1dd8e5d8e8e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/df826a6c-41fe-4390-9eb6-eb327ba63580.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/df826a6c-41fe-4390-9eb6-eb327ba63580.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/df826a6c-41fe-4390-9eb6-eb327ba63580
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6084417045be4142d5c52cb0518ba3bb7e604ff648b42cb9be66b1dd8e5d8e8e","name":"Jeff Hammer","registered_at":"2026-06-21T06:11:19Z","symbol":"NIM1843612","token_address":"0x8589f5e297289faeef885cfc396602585df189d0","type":"artist","uuid":"df826a6c-41fe-4390-9eb6-eb327ba63580"}
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 0x6084417045be4142d5c52cb0518ba3bb7e604ff648b42cb9be66b1dd8e5d8e8e. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df826a6c-41fe-4390-9eb6-eb327ba63580.json and https://artists.proofprofile.net/proofs/artist/df826a6c-41fe-4390-9eb6-eb327ba63580.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x6084417045be4142d5c52cb0518ba3bb7e604ff648b42cb9be66b1dd8e5d8e8e","name":"Jeff Hammer","registered_at":"2026-06-21T06:11:19Z","symbol":"NIM1843612","token_address":"0x8589f5e297289faeef885cfc396602585df189d0","type":"artist","uuid":"df826a6c-41fe-4390-9eb6-eb327ba63580"}
album: Happy and You Know It
  type: MusicAlbum
  date published: 2018-11-23
album: Favourite Fun Songs
  type: MusicAlbum
  date published: 2020-05-29