Len Carter
type: MusicGroup
description: Leonard Walter Carter (born 21 November 1942) is a former British sprinter. Biography Carter finished third behind Seraphino Antao in the 2220 yards event at the 1962 AAA Championships. Later that
popularity: 2
followers: 44
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa4f59dd980c1fdc083b34faa3b25f5ba00b896f98899ff5adeb4f21c73e2608c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b03c0087-057b-46f6-b72f-94069979afa8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b03c0087-057b-46f6-b72f-94069979afa8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b03c0087-057b-46f6-b72f-94069979afa8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa4f59dd980c1fdc083b34faa3b25f5ba00b896f98899ff5adeb4f21c73e2608c","name":"Len Carter","registered_at":"2026-06-20T11:57:03Z","symbol":"NIM1607483","token_address":"0xf75ff7c023a47725e882e001d09fb786f149b037","type":"artist","uuid":"b03c0087-057b-46f6-b72f-94069979afa8"}
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 0xa4f59dd980c1fdc083b34faa3b25f5ba00b896f98899ff5adeb4f21c73e2608c. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b03c0087-057b-46f6-b72f-94069979afa8.json and https://artists.proofprofile.net/proofs/artist/b03c0087-057b-46f6-b72f-94069979afa8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0xa4f59dd980c1fdc083b34faa3b25f5ba00b896f98899ff5adeb4f21c73e2608c","name":"Len Carter","registered_at":"2026-06-20T11:57:03Z","symbol":"NIM1607483","token_address":"0xf75ff7c023a47725e882e001d09fb786f149b037","type":"artist","uuid":"b03c0087-057b-46f6-b72f-94069979afa8"}
album: Chasing Dreams
  type: MusicAlbum
  date published: 2024-12-04