QB may refer to: Arts and entertainment Quantum Break, a 2016 video game Quest Beat, a video game label Quratulain Balouch, Pakistani singer Kyubey, antagonist of 2011 anime Puella Magi Madoka Mag
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f557465d634263a3f590876e0285c4073d3df03a72cf9f9051f9f29f6668114. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81b8b1ee-ac74-4b92-8ab8-31227f08f620.json and https://artists.proofprofile.net/proofs/artist/81b8b1ee-ac74-4b92-8ab8-31227f08f620.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).