Speculum Ensemble
type: MusicGroup
genre: medieval
popularity: 3
followers: 342
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6b9e730c8d0dcad0e103593d447b82ef58fd414cd639e33f7b760d971d6a46e8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954513
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9eee0ee9-273b-43b2-8a21-dc1b66ad87bf.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9eee0ee9-273b-43b2-8a21-dc1b66ad87bf.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9eee0ee9-273b-43b2-8a21-dc1b66ad87bf
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T06:31:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6b9e730c8d0dcad0e103593d447b82ef58fd414cd639e33f7b760d971d6a46e8","name":"Speculum Ensemble","registered_at":"2026-06-20T05:05:26Z","symbol":"NIM1520800","token_address":"0xf0f5511b6ae7306c95636bac5e05b933e3a2e5c4","type":"artist","uuid":"9eee0ee9-273b-43b2-8a21-dc1b66ad87bf"}
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 0x6b9e730c8d0dcad0e103593d447b82ef58fd414cd639e33f7b760d971d6a46e8. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9eee0ee9-273b-43b2-8a21-dc1b66ad87bf.json and https://artists.proofprofile.net/proofs/artist/9eee0ee9-273b-43b2-8a21-dc1b66ad87bf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T06:31:18Z
  text: {"copyright_id":"0x6b9e730c8d0dcad0e103593d447b82ef58fd414cd639e33f7b760d971d6a46e8","name":"Speculum Ensemble","registered_at":"2026-06-20T05:05:26Z","symbol":"NIM1520800","token_address":"0xf0f5511b6ae7306c95636bac5e05b933e3a2e5c4","type":"artist","uuid":"9eee0ee9-273b-43b2-8a21-dc1b66ad87bf"}
album: Music for the Bentivoglio: Unica and highlights from codex Q 18
  type: MusicAlbum
  date published: 2013-01-01
album: Music for the Bentivoglio: Unica and highlights from codex Q 18
  type: MusicAlbum
  date published: 2013-01-01