Agnes Tschetschulin
type: MusicGroup
description: thumb|Tschetschulin Agnes Tschetschulin (24 February 1859 – 23 April 1942) was a Finnish composer and violinist who toured internationally. Tschetschulin was born in Helsinki to Feodor and Hilda Ec
popularity: 6
followers: 19
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf40f5b079372b8a75651a2998d855b745f9bc70369b363a437d2e65c5981ec2e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954047
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954047
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/423de33e-5dcc-404a-94ee-ae5e86be479a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/423de33e-5dcc-404a-94ee-ae5e86be479a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/423de33e-5dcc-404a-94ee-ae5e86be479a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:56:08Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf40f5b079372b8a75651a2998d855b745f9bc70369b363a437d2e65c5981ec2e","name":"Agnes Tschetschulin","registered_at":"2026-06-16T12:44:04Z","symbol":"NIM1055795","token_address":"0x95370980e3ca4089480d58d1bcaab2b39739089e","type":"artist","uuid":"423de33e-5dcc-404a-94ee-ae5e86be479a"}
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 0xf40f5b079372b8a75651a2998d855b745f9bc70369b363a437d2e65c5981ec2e. Chain 2 (Bitcoin): anchored in block 954047 (2026-06-17T04:56:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/423de33e-5dcc-404a-94ee-ae5e86be479a.json and https://artists.proofprofile.net/proofs/artist/423de33e-5dcc-404a-94ee-ae5e86be479a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T04:56:08Z
  text: {"copyright_id":"0xf40f5b079372b8a75651a2998d855b745f9bc70369b363a437d2e65c5981ec2e","name":"Agnes Tschetschulin","registered_at":"2026-06-16T12:44:04Z","symbol":"NIM1055795","token_address":"0x95370980e3ca4089480d58d1bcaab2b39739089e","type":"artist","uuid":"423de33e-5dcc-404a-94ee-ae5e86be479a"}