External
type: MusicGroup
genre: progressive metal
description: External may refer to: Externality, in economics, the cost or benefit that affects a party who did not choose to incur that cost or benefit Externals, a fictional group of X-Men antagonists See al
popularity: 4
followers: 1657
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe6135c04f21c3451cf41b57c62d8af969793dac31d72de95a8dd27645c3a5098
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/2d30794a-326a-47e0-8cf5-c7ae4977f7a1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d30794a-326a-47e0-8cf5-c7ae4977f7a1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2d30794a-326a-47e0-8cf5-c7ae4977f7a1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:08:34Z
additional property: OTSCanonicalRecord
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 0xe6135c04f21c3451cf41b57c62d8af969793dac31d72de95a8dd27645c3a5098. 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/2d30794a-326a-47e0-8cf5-c7ae4977f7a1.json and https://artists.proofprofile.net/proofs/artist/2d30794a-326a-47e0-8cf5-c7ae4977f7a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T18:08:34Z
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