Kellin Quinn
type: MusicGroup
description: Kellin Quinn Bostwick (born April 24, 1986) is an American singer and musician. He is the lead vocalist and keyboardist of the rock band Sleeping with Sirens. He is known for his distinctive, high-pit
popularity: 18
followers: 79
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8731949a4ea093d872cefcb13b32708fb6f599c7d9670cd6224d390399c9db2e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953701
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953701
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/763ff377-07b5-4120-9296-19b3f3a9ebdf.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/763ff377-07b5-4120-9296-19b3f3a9ebdf.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/763ff377-07b5-4120-9296-19b3f3a9ebdf
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T22:16:40Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8731949a4ea093d872cefcb13b32708fb6f599c7d9670cd6224d390399c9db2e","name":"Kellin Quinn","registered_at":"2026-06-14T16:48:54Z","symbol":"NIM0515171","token_address":"0xe731bd1fa38e84ec9590c00806935ddcbb1dc4a7","type":"artist","uuid":"763ff377-07b5-4120-9296-19b3f3a9ebdf"}
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 0x8731949a4ea093d872cefcb13b32708fb6f599c7d9670cd6224d390399c9db2e. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/763ff377-07b5-4120-9296-19b3f3a9ebdf.json and https://artists.proofprofile.net/proofs/artist/763ff377-07b5-4120-9296-19b3f3a9ebdf.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-14T22:16:40Z
  text: {"copyright_id":"0x8731949a4ea093d872cefcb13b32708fb6f599c7d9670cd6224d390399c9db2e","name":"Kellin Quinn","registered_at":"2026-06-14T16:48:54Z","symbol":"NIM0515171","token_address":"0xe731bd1fa38e84ec9590c00806935ddcbb1dc4a7","type":"artist","uuid":"763ff377-07b5-4120-9296-19b3f3a9ebdf"}