Haec Dies
type: MusicGroup
genre: gregorian chant
popularity: 2
followers: 64
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5ff2ac823ca58fb63f53879995db5b01cb1139a07ab4e481e5b570560ca1f7a9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fb985b53-5c6a-480d-8b85-a9411280103b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fb985b53-5c6a-480d-8b85-a9411280103b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fb985b53-5c6a-480d-8b85-a9411280103b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5ff2ac823ca58fb63f53879995db5b01cb1139a07ab4e481e5b570560ca1f7a9","name":"Haec Dies","registered_at":"2026-06-21T17:20:05Z","symbol":"NIM1984235","token_address":"0x8d892b707c13c8a561b045a4c3fe0f22408ebfb0","type":"artist","uuid":"fb985b53-5c6a-480d-8b85-a9411280103b"}
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 0x5ff2ac823ca58fb63f53879995db5b01cb1139a07ab4e481e5b570560ca1f7a9. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb985b53-5c6a-480d-8b85-a9411280103b.json and https://artists.proofprofile.net/proofs/artist/fb985b53-5c6a-480d-8b85-a9411280103b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0x5ff2ac823ca58fb63f53879995db5b01cb1139a07ab4e481e5b570560ca1f7a9","name":"Haec Dies","registered_at":"2026-06-21T17:20:05Z","symbol":"NIM1984235","token_address":"0x8d892b707c13c8a561b045a4c3fe0f22408ebfb0","type":"artist","uuid":"fb985b53-5c6a-480d-8b85-a9411280103b"}
album: Haec Dies Domini (Canto Gregoriano)
  type: MusicAlbum
  date published: 2019-02-21
album: Christus factus est obediens
  type: MusicAlbum
  date published: 2025-03-20