TUNING FORK
type: MusicGroup
description: thumb|Tuning fork by John Walker stamped with note (E) and frequency in hertz (659) A tuning fork is an acoustic resonator in the form of a two-pronged fork with the prongs (tines) formed from a U-sh
popularity: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x311ac76a3c685af26b661e404dbfa186c434f6c5feeda0873dc4e3f1f5241c78
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953984
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953984
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2de3d094-bcb8-40fa-bb56-c2a25453cd98.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2de3d094-bcb8-40fa-bb56-c2a25453cd98.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2de3d094-bcb8-40fa-bb56-c2a25453cd98
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:08:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x311ac76a3c685af26b661e404dbfa186c434f6c5feeda0873dc4e3f1f5241c78","name":"TUNING FORK","registered_at":"2026-06-16T05:32:38Z","symbol":"NIM0952831","token_address":"0x7982ec6f9cd270252c604d938899532bdf2f82c4","type":"artist","uuid":"2de3d094-bcb8-40fa-bb56-c2a25453cd98"}
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 0x311ac76a3c685af26b661e404dbfa186c434f6c5feeda0873dc4e3f1f5241c78. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2de3d094-bcb8-40fa-bb56-c2a25453cd98.json and https://artists.proofprofile.net/proofs/artist/2de3d094-bcb8-40fa-bb56-c2a25453cd98.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T18:08:34Z
  text: {"copyright_id":"0x311ac76a3c685af26b661e404dbfa186c434f6c5feeda0873dc4e3f1f5241c78","name":"TUNING FORK","registered_at":"2026-06-16T05:32:38Z","symbol":"NIM0952831","token_address":"0x7982ec6f9cd270252c604d938899532bdf2f82c4","type":"artist","uuid":"2de3d094-bcb8-40fa-bb56-c2a25453cd98"}