狭山第二児童館合唱団
type: MusicGroup
popularity: 4
followers: 15
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf29245c1416d18e23d49f5b89ba3db5805feb3498b5ffc94081b5d12f540b19c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953996
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953996
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2fe65ade-26d5-4051-b5eb-a2dc892b0c63.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2fe65ade-26d5-4051-b5eb-a2dc892b0c63.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2fe65ade-26d5-4051-b5eb-a2dc892b0c63
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:04:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf29245c1416d18e23d49f5b89ba3db5805feb3498b5ffc94081b5d12f540b19c","name":"狭山第二児童館合唱団","registered_at":"2026-06-16T06:15:49Z","symbol":"NIM0963131","token_address":"0x8d661d7148636a6fb43945d3229c4e0f35e0827b","type":"artist","uuid":"2fe65ade-26d5-4051-b5eb-a2dc892b0c63"}
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 0xf29245c1416d18e23d49f5b89ba3db5805feb3498b5ffc94081b5d12f540b19c. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fe65ade-26d5-4051-b5eb-a2dc892b0c63.json and https://artists.proofprofile.net/proofs/artist/2fe65ade-26d5-4051-b5eb-a2dc892b0c63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:04:35Z
  text: {"copyright_id":"0xf29245c1416d18e23d49f5b89ba3db5805feb3498b5ffc94081b5d12f540b19c","name":"狭山第二児童館合唱団","registered_at":"2026-06-16T06:15:49Z","symbol":"NIM0963131","token_address":"0x8d661d7148636a6fb43945d3229c4e0f35e0827b","type":"artist","uuid":"2fe65ade-26d5-4051-b5eb-a2dc892b0c63"}