Last Seen Laughing
type: MusicGroup
genre: punk
popularity: 3
followers: 969
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x56ce271399acee9321011209038b0f48bc9e6de9f7f9bf3eba4b2ed75d7e5416
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953928
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953928
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1df03b74-0587-415a-bd29-2e3736d4d5e3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1df03b74-0587-415a-bd29-2e3736d4d5e3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1df03b74-0587-415a-bd29-2e3736d4d5e3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T10:21:55Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x56ce271399acee9321011209038b0f48bc9e6de9f7f9bf3eba4b2ed75d7e5416","name":"Last Seen Laughing","registered_at":"2026-06-15T23:59:47Z","symbol":"NIM0873323","token_address":"0x62a280cf1d3f9313cdf8968807f252f6d27f6249","type":"artist","uuid":"1df03b74-0587-415a-bd29-2e3736d4d5e3"}
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 0x56ce271399acee9321011209038b0f48bc9e6de9f7f9bf3eba4b2ed75d7e5416. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1df03b74-0587-415a-bd29-2e3736d4d5e3.json and https://artists.proofprofile.net/proofs/artist/1df03b74-0587-415a-bd29-2e3736d4d5e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x56ce271399acee9321011209038b0f48bc9e6de9f7f9bf3eba4b2ed75d7e5416","name":"Last Seen Laughing","registered_at":"2026-06-15T23:59:47Z","symbol":"NIM0873323","token_address":"0x62a280cf1d3f9313cdf8968807f252f6d27f6249","type":"artist","uuid":"1df03b74-0587-415a-bd29-2e3736d4d5e3"}
album: Where We Belong
  type: MusicAlbum
  date published: 2011-07-29
album: Where We Belong
  type: MusicAlbum
  date published: 2011-07-29
album: As True as It Gets
  type: MusicAlbum
  date published: 2014-04-18
album: Critics (Extended E.P. 2019 Edition)
  type: MusicAlbum
  date published: 2019-11-05