Johnny Lion
type: MusicGroup
genre: indorock
genre: nederpop
description: John van Leeuwarden (4 July 1941 – 31 January 2019), who recorded under the name Johnny Lion, was a Dutch singer, journalist and actor. His best known song as a solo artist was his hit single "Sophie
popularity: 26
followers: 2218
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4c4d6e826af3be4f4797be44dc7bcf518492feda24e45325a2e5b4ca31f2c752
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/91642a10-906b-4cfd-870f-3b9e9f7ea45c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/91642a10-906b-4cfd-870f-3b9e9f7ea45c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/91642a10-906b-4cfd-870f-3b9e9f7ea45c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4c4d6e826af3be4f4797be44dc7bcf518492feda24e45325a2e5b4ca31f2c752","name":"Johnny Lion","registered_at":"2026-06-12T04:37:35Z","symbol":"NIM0189003","token_address":"0xe7a1bd29ae12ca10e024136c020308ce602d24e6","type":"artist","uuid":"91642a10-906b-4cfd-870f-3b9e9f7ea45c"}
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 0x4c4d6e826af3be4f4797be44dc7bcf518492feda24e45325a2e5b4ca31f2c752. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91642a10-906b-4cfd-870f-3b9e9f7ea45c.json and https://artists.proofprofile.net/proofs/artist/91642a10-906b-4cfd-870f-3b9e9f7ea45c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0x4c4d6e826af3be4f4797be44dc7bcf518492feda24e45325a2e5b4ca31f2c752","name":"Johnny Lion","registered_at":"2026-06-12T04:37:35Z","symbol":"NIM0189003","token_address":"0xe7a1bd29ae12ca10e024136c020308ce602d24e6","type":"artist","uuid":"91642a10-906b-4cfd-870f-3b9e9f7ea45c"}
album: Vriendschap
  type: MusicAlbum
  date published: 1997
album: Popinstituut.NL / The Complete Collection
  type: MusicAlbum
  date published: 2003-01-01