Liuwe Tamminga
type: MusicGroup
genre: gregorian chant
genre: medieval
description: Liuwe Tamminga (25 September 1953 – 28 April 2021)Biography at muziekencyclopedie.nl / https://bologna.repubblica.it/cronaca/2021/04/29/news/e_morto_luwe_tamminga_bologna_organista-298601215/ was a D
popularity: 15
followers: 773
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3493c1a13780f15b24ebb1400af078a3531a5aaebe7695ff41946e450eb3c8e1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953694
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953694
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6e93dc0e-d94e-4442-a715-d20fb794e1c2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6e93dc0e-d94e-4442-a715-d20fb794e1c2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6e93dc0e-d94e-4442-a715-d20fb794e1c2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T21:38:09Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3493c1a13780f15b24ebb1400af078a3531a5aaebe7695ff41946e450eb3c8e1","name":"Liuwe Tamminga","registered_at":"2026-06-14T16:03:53Z","symbol":"NIM0504432","token_address":"0x380fc39967d60627f57a4ff9d38e909aaf3d5815","type":"artist","uuid":"6e93dc0e-d94e-4442-a715-d20fb794e1c2"}
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 0x3493c1a13780f15b24ebb1400af078a3531a5aaebe7695ff41946e450eb3c8e1. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e93dc0e-d94e-4442-a715-d20fb794e1c2.json and https://artists.proofprofile.net/proofs/artist/6e93dc0e-d94e-4442-a715-d20fb794e1c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T21:49:28Z
  text: {"copyright_id":"0x3493c1a13780f15b24ebb1400af078a3531a5aaebe7695ff41946e450eb3c8e1","name":"Liuwe Tamminga","registered_at":"2026-06-14T16:03:53Z","symbol":"NIM0504432","token_address":"0x380fc39967d60627f57a4ff9d38e909aaf3d5815","type":"artist","uuid":"6e93dc0e-d94e-4442-a715-d20fb794e1c2"}
album: Vermeer a Bologna
  type: MusicAlbum
  date published: 2014