Tuva Semmingsen
type: MusicGroup
genre: orchestra
description: Tuva Semmingsen (born 13 January 1975) is a Norwegian mezzo-soprano and coloratura singer. After studying at the Norwegian Academy of Music, she studied at the Opera Academy in Copenhagen. She made
popularity: 6
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb7ac30975222362787c373d8cbbad45d45aa892bbe7ec419be34b638beddfb46
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954000
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954000
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/31bc1f7d-1a52-4496-9732-4b98b0a08aee.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/31bc1f7d-1a52-4496-9732-4b98b0a08aee.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/31bc1f7d-1a52-4496-9732-4b98b0a08aee
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:18:46Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb7ac30975222362787c373d8cbbad45d45aa892bbe7ec419be34b638beddfb46","name":"Tuva Semmingsen","registered_at":"2026-06-16T06:55:51Z","symbol":"NIM0972693","token_address":"0x5b986b1692f1d59a4df81efd1f680360bfdf0ef7","type":"artist","uuid":"31bc1f7d-1a52-4496-9732-4b98b0a08aee"}
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 0xb7ac30975222362787c373d8cbbad45d45aa892bbe7ec419be34b638beddfb46. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31bc1f7d-1a52-4496-9732-4b98b0a08aee.json and https://artists.proofprofile.net/proofs/artist/31bc1f7d-1a52-4496-9732-4b98b0a08aee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T22:46:20Z
  text: {"copyright_id":"0xb7ac30975222362787c373d8cbbad45d45aa892bbe7ec419be34b638beddfb46","name":"Tuva Semmingsen","registered_at":"2026-06-16T06:55:51Z","symbol":"NIM0972693","token_address":"0x5b986b1692f1d59a4df81efd1f680360bfdf0ef7","type":"artist","uuid":"31bc1f7d-1a52-4496-9732-4b98b0a08aee"}