Crystal Radio
type: MusicGroup
description: thumb|Swedish crystal radio from 1922 made by Radiola, with earphones. The device at top is the radio's cat's whisker detector. A second pair of earphone jacks is provided. thumb|1970s-era Arrow cryst
popularity: 2
followers: 149
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x623902b7170214048d2625a74a15a507a713292ce54e7403c9d4b71aa4c17531
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3026db94-11e4-4a33-805f-1a2861db893e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3026db94-11e4-4a33-805f-1a2861db893e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3026db94-11e4-4a33-805f-1a2861db893e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x623902b7170214048d2625a74a15a507a713292ce54e7403c9d4b71aa4c17531","name":"Crystal Radio","registered_at":"2026-06-16T06:24:06Z","symbol":"NIM0965115","token_address":"0xbf280b18f023663369c9cef66ca03774991774d0","type":"artist","uuid":"3026db94-11e4-4a33-805f-1a2861db893e"}
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 0x623902b7170214048d2625a74a15a507a713292ce54e7403c9d4b71aa4c17531. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3026db94-11e4-4a33-805f-1a2861db893e.json and https://artists.proofprofile.net/proofs/artist/3026db94-11e4-4a33-805f-1a2861db893e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x623902b7170214048d2625a74a15a507a713292ce54e7403c9d4b71aa4c17531","name":"Crystal Radio","registered_at":"2026-06-16T06:24:06Z","symbol":"NIM0965115","token_address":"0xbf280b18f023663369c9cef66ca03774991774d0","type":"artist","uuid":"3026db94-11e4-4a33-805f-1a2861db893e"}
album: Decategorized Sound
  type: MusicAlbum
  date published: 2008-01-01
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  type: MusicAlbum
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  type: MusicAlbum
  date published: 2018-09-01