RA3 may refer to: Command & Conquer: Red Alert 3, a real-time strategy video game Raccordo autostradale RA3 Rocket Arena 3, an unofficial game modification for first-person shooter Quake III: Aren
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 0x2ea5365b295cd802a7b42be10ac9f12e3843014ab871896aaa2ead04c4a5e2c6. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e6db71b-99e6-4595-a486-cd7b4e34b41d.json and https://artists.proofprofile.net/proofs/artist/4e6db71b-99e6-4595-a486-cd7b4e34b41d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).