Sara Singh
type: MusicGroup
description: Sara Singh (born 1985) is a Canadian politician. She was one of the two Deputy Leaders of the Ontario New Democratic Party, alongside John Vanthof, and also Opposition Critic for Attorney General from
popularity: 20
followers: 55
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb2be63cee271fe1e20d732f3d228fa1173d6c60a69f0bf62d7fb950e1fdd364d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953772
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953772
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c4d3a5e3-dc71-44cc-bb67-8b819e2f1715.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c4d3a5e3-dc71-44cc-bb67-8b819e2f1715.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c4d3a5e3-dc71-44cc-bb67-8b819e2f1715
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T10:33:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb2be63cee271fe1e20d732f3d228fa1173d6c60a69f0bf62d7fb950e1fdd364d","name":"Sara Singh","registered_at":"2026-06-15T01:13:11Z","symbol":"NIM0635472","token_address":"0xbee4905166bef51795b47f87fa469be7c7a966ce","type":"artist","uuid":"c4d3a5e3-dc71-44cc-bb67-8b819e2f1715"}
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 0xb2be63cee271fe1e20d732f3d228fa1173d6c60a69f0bf62d7fb950e1fdd364d. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4d3a5e3-dc71-44cc-bb67-8b819e2f1715.json and https://artists.proofprofile.net/proofs/artist/c4d3a5e3-dc71-44cc-bb67-8b819e2f1715.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T10:33:29Z
  text: {"copyright_id":"0xb2be63cee271fe1e20d732f3d228fa1173d6c60a69f0bf62d7fb950e1fdd364d","name":"Sara Singh","registered_at":"2026-06-15T01:13:11Z","symbol":"NIM0635472","token_address":"0xbee4905166bef51795b47f87fa469be7c7a966ce","type":"artist","uuid":"c4d3a5e3-dc71-44cc-bb67-8b819e2f1715"}