23 Metro
type: MusicGroup
popularity: 9
followers: 191
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x50f5791cc07f64dd7c76f0b95f4ab976a1799b267b190d73487d51489b7a2e8a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954513
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9e51b790-8275-463f-a412-fed071213644.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9e51b790-8275-463f-a412-fed071213644.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9e51b790-8275-463f-a412-fed071213644
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T06:31:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x50f5791cc07f64dd7c76f0b95f4ab976a1799b267b190d73487d51489b7a2e8a","name":"23 Metro","registered_at":"2026-06-20T05:06:05Z","symbol":"NIM1519973","token_address":"0x22f0bce05d5d98b2f149ebccb759156cb34f5e99","type":"artist","uuid":"9e51b790-8275-463f-a412-fed071213644"}
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 0x50f5791cc07f64dd7c76f0b95f4ab976a1799b267b190d73487d51489b7a2e8a. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e51b790-8275-463f-a412-fed071213644.json and https://artists.proofprofile.net/proofs/artist/9e51b790-8275-463f-a412-fed071213644.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T06:31:18Z
  text: {"copyright_id":"0x50f5791cc07f64dd7c76f0b95f4ab976a1799b267b190d73487d51489b7a2e8a","name":"23 Metro","registered_at":"2026-06-20T05:06:05Z","symbol":"NIM1519973","token_address":"0x22f0bce05d5d98b2f149ebccb759156cb34f5e99","type":"artist","uuid":"9e51b790-8275-463f-a412-fed071213644"}
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  date published: 2023-12-01
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