Q3 or Q-3 may refer to: Transportation Zambian Airways, IATA airline code Q3 Audi Q3, a subcompact luxury crossover SUV produced from 2011 Q3 (New York City bus), a bus line in New York City Qu
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 0xd538e1b7fec595c28f1b250fc8d87d5e5e2dcd779841e8221c650c9133587a7b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9f74c31-891c-4f51-81be-e48e94378ff6.json and https://artists.proofprofile.net/proofs/artist/c9f74c31-891c-4f51-81be-e48e94378ff6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).