Toy Problem
type: MusicGroup
description: thumb|Vacuum World, a shortest path problem in which the goal is to vacuum up all the pieces of dirt In scientific disciplines, a toy problem or a puzzlelike problem is a problem that is not of immedi
popularity: 5
followers: 52
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd99ac09ae1b61ba8510fd8958a6d065b255d75e52de071add0dfe580dbfb2958
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954050
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954050
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42c7a389-79db-48ea-b31a-cbb9e04b8537.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42c7a389-79db-48ea-b31a-cbb9e04b8537.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/42c7a389-79db-48ea-b31a-cbb9e04b8537
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T05:14:33Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd99ac09ae1b61ba8510fd8958a6d065b255d75e52de071add0dfe580dbfb2958","name":"Toy Problem","registered_at":"2026-06-16T12:51:31Z","symbol":"NIM1057568","token_address":"0xdda46d081f4c981da2ef9ed938c46bbf9f81dc7a","type":"artist","uuid":"42c7a389-79db-48ea-b31a-cbb9e04b8537"}
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 0xd99ac09ae1b61ba8510fd8958a6d065b255d75e52de071add0dfe580dbfb2958. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42c7a389-79db-48ea-b31a-cbb9e04b8537.json and https://artists.proofprofile.net/proofs/artist/42c7a389-79db-48ea-b31a-cbb9e04b8537.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T05:14:33Z
  text: {"copyright_id":"0xd99ac09ae1b61ba8510fd8958a6d065b255d75e52de071add0dfe580dbfb2958","name":"Toy Problem","registered_at":"2026-06-16T12:51:31Z","symbol":"NIM1057568","token_address":"0xdda46d081f4c981da2ef9ed938c46bbf9f81dc7a","type":"artist","uuid":"42c7a389-79db-48ea-b31a-cbb9e04b8537"}