Häffansgrabbarna
type: MusicGroup
popularity: 2
followers: 61
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x971a8637b7ff0e323e99fff1f1153e27a244c90ea134275909b8b724b5540e71
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b4d21e00-3ed1-4f21-87a9-9cbc25b98e47.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b4d21e00-3ed1-4f21-87a9-9cbc25b98e47.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b4d21e00-3ed1-4f21-87a9-9cbc25b98e47
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x971a8637b7ff0e323e99fff1f1153e27a244c90ea134275909b8b724b5540e71","name":"Häffansgrabbarna","registered_at":"2026-06-20T14:44:32Z","symbol":"NIM1633105","token_address":"0x6eba7f141c4280b0842d380fe49e34c8c4bea8b2","type":"artist","uuid":"b4d21e00-3ed1-4f21-87a9-9cbc25b98e47"}
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 0x971a8637b7ff0e323e99fff1f1153e27a244c90ea134275909b8b724b5540e71. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4d21e00-3ed1-4f21-87a9-9cbc25b98e47.json and https://artists.proofprofile.net/proofs/artist/b4d21e00-3ed1-4f21-87a9-9cbc25b98e47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x971a8637b7ff0e323e99fff1f1153e27a244c90ea134275909b8b724b5540e71","name":"Häffansgrabbarna","registered_at":"2026-06-20T14:44:32Z","symbol":"NIM1633105","token_address":"0x6eba7f141c4280b0842d380fe49e34c8c4bea8b2","type":"artist","uuid":"b4d21e00-3ed1-4f21-87a9-9cbc25b98e47"}
album: Rymden
  type: MusicAlbum
  date published: 1989-12-24
album: Rockstars
  type: MusicAlbum
  date published: 2024-07-24