Gerda Havertong
type: MusicGroup
description: Gerda Alexandra Havertong (Paramaribo, Surinam - 23 October 1946) is a Dutch-Surinamese actress, television presenter, actress and singer. She is well known for being a recurring character in Sesamstr
popularity: 2
followers: 51
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x559d93abd8679a8f92287da00b4ec1ca32c3d5fc8ca6fea7ba2eadd6a9134dd4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b278ae0f-dead-48ba-9d1d-565c5689ce0e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b278ae0f-dead-48ba-9d1d-565c5689ce0e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b278ae0f-dead-48ba-9d1d-565c5689ce0e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x559d93abd8679a8f92287da00b4ec1ca32c3d5fc8ca6fea7ba2eadd6a9134dd4","name":"Gerda Havertong","registered_at":"2026-06-20T12:54:40Z","symbol":"NIM1616687","token_address":"0xaf3599350d9d412b8e0b26c2d74977ad1b53aeef","type":"artist","uuid":"b278ae0f-dead-48ba-9d1d-565c5689ce0e"}
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 0x559d93abd8679a8f92287da00b4ec1ca32c3d5fc8ca6fea7ba2eadd6a9134dd4. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b278ae0f-dead-48ba-9d1d-565c5689ce0e.json and https://artists.proofprofile.net/proofs/artist/b278ae0f-dead-48ba-9d1d-565c5689ce0e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0x559d93abd8679a8f92287da00b4ec1ca32c3d5fc8ca6fea7ba2eadd6a9134dd4","name":"Gerda Havertong","registered_at":"2026-06-20T12:54:40Z","symbol":"NIM1616687","token_address":"0xaf3599350d9d412b8e0b26c2d74977ad1b53aeef","type":"artist","uuid":"b278ae0f-dead-48ba-9d1d-565c5689ce0e"}
album: Dag Zwarte Piet (feat. Margo Morrison)
  type: MusicAlbum
  date published: 2016-05-24
album: De Tuin
  type: MusicAlbum
  date published: 2023-02-22