Astrid Riska
type: MusicGroup
genre: choral
description: thumb| Astrid Riska Astrid Riska (14 December 1932 – 13 April 2010) was a Finnish organist. She showed interest in children's choirs and voice training. Biography Astrid Riska was born as Astrid Li
popularity: 6
followers: 78
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa6651071436787adbd594f215acd14d6351e7aab6c2a33fbbc9a9ce69bbd61dd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a884e515-4ab6-40b1-b2c0-12fd2fc735b0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a884e515-4ab6-40b1-b2c0-12fd2fc735b0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a884e515-4ab6-40b1-b2c0-12fd2fc735b0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa6651071436787adbd594f215acd14d6351e7aab6c2a33fbbc9a9ce69bbd61dd","name":"Astrid Riska","registered_at":"2026-06-20T08:31:39Z","symbol":"NIM1566628","token_address":"0x63b28ca5c8680f7ddf57773a5f53221106f6dc26","type":"artist","uuid":"a884e515-4ab6-40b1-b2c0-12fd2fc735b0"}
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 0xa6651071436787adbd594f215acd14d6351e7aab6c2a33fbbc9a9ce69bbd61dd. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a884e515-4ab6-40b1-b2c0-12fd2fc735b0.json and https://artists.proofprofile.net/proofs/artist/a884e515-4ab6-40b1-b2c0-12fd2fc735b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T10:56:20Z
  text: {"copyright_id":"0xa6651071436787adbd594f215acd14d6351e7aab6c2a33fbbc9a9ce69bbd61dd","name":"Astrid Riska","registered_at":"2026-06-20T08:31:39Z","symbol":"NIM1566628","token_address":"0x63b28ca5c8680f7ddf57773a5f53221106f6dc26","type":"artist","uuid":"a884e515-4ab6-40b1-b2c0-12fd2fc735b0"}
album: Jul med Jubilate
  type: MusicAlbum
  date published: 1988-08-26