Frida Sandén
type: MusicGroup
description: Frida Lina Marianne Sandén (born 20 May 1994) is a Swedish singer who represented Sweden in the Junior Eurovision Song Contest 2007 where she placed eighth. During 2008 and 2009 Frida has participated
popularity: 2
followers: 1223
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xef12c69d9a0f40d2eee8725348f37eeee886560273d51ededf3949c70a0bce9b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/58c5514e-c6cc-4787-9261-33de37548a0a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/58c5514e-c6cc-4787-9261-33de37548a0a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/58c5514e-c6cc-4787-9261-33de37548a0a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xef12c69d9a0f40d2eee8725348f37eeee886560273d51ededf3949c70a0bce9b","name":"Frida Sandén","registered_at":"2026-06-16T20:33:50Z","symbol":"NIM1167879","token_address":"0xe85b8cc5681a5017fa9d1e300804b84b33f97bd7","type":"artist","uuid":"58c5514e-c6cc-4787-9261-33de37548a0a"}
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 0xef12c69d9a0f40d2eee8725348f37eeee886560273d51ededf3949c70a0bce9b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58c5514e-c6cc-4787-9261-33de37548a0a.json and https://artists.proofprofile.net/proofs/artist/58c5514e-c6cc-4787-9261-33de37548a0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xef12c69d9a0f40d2eee8725348f37eeee886560273d51ededf3949c70a0bce9b","name":"Frida Sandén","registered_at":"2026-06-16T20:33:50Z","symbol":"NIM1167879","token_address":"0xe85b8cc5681a5017fa9d1e300804b84b33f97bd7","type":"artist","uuid":"58c5514e-c6cc-4787-9261-33de37548a0a"}