EXB or Ex B can refer to: Brazilian Army Aviation, the part of the Brazilian Army responsible for helicopters, by ICAO airline code; see List of airline codes#B Ex Battalion, a Filipino hip hop col
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cafcb619037a6a628adad3d72cbd3b1f15685d813ece93aabd55ca4b61c13e. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a458a89-97cf-4c73-b1df-1d540adb2e42.json and https://artists.proofprofile.net/proofs/artist/7a458a89-97cf-4c73-b1df-1d540adb2e42.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).