The Sketch
type: MusicGroup
description: The Sketch was a British illustrated weekly journal. It ran for 2,989 issues between 1 February 1893 and 17 June 1959. It was published by the Illustrated London News Company and was primarily a socie
popularity: 14
followers: 174
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe1fa8a31af6b887a025658fa287bbd469cf634a42e5cf8ab67b2414da95d8e44
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953741
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953741
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9ffbe47f-2a61-488f-b6a6-dba6b61e4312.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9ffbe47f-2a61-488f-b6a6-dba6b61e4312.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9ffbe47f-2a61-488f-b6a6-dba6b61e4312
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T04:44:49Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe1fa8a31af6b887a025658fa287bbd469cf634a42e5cf8ab67b2414da95d8e44","name":"The Sketch","registered_at":"2026-06-14T21:22:37Z","symbol":"NIM0580409","token_address":"0xf41497be75c5d723baeba1acfeb87421009e3800","type":"artist","uuid":"9ffbe47f-2a61-488f-b6a6-dba6b61e4312"}
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 0xe1fa8a31af6b887a025658fa287bbd469cf634a42e5cf8ab67b2414da95d8e44. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ffbe47f-2a61-488f-b6a6-dba6b61e4312.json and https://artists.proofprofile.net/proofs/artist/9ffbe47f-2a61-488f-b6a6-dba6b61e4312.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T04:44:49Z
  text: {"copyright_id":"0xe1fa8a31af6b887a025658fa287bbd469cf634a42e5cf8ab67b2414da95d8e44","name":"The Sketch","registered_at":"2026-06-14T21:22:37Z","symbol":"NIM0580409","token_address":"0xf41497be75c5d723baeba1acfeb87421009e3800","type":"artist","uuid":"9ffbe47f-2a61-488f-b6a6-dba6b61e4312"}