MB5 may refer to: Vehicles and transport Honda MB5, motorcycle Martin-Baker MB 5, UK WWII fighter plane Oshkosh MB-5, airport firetruck Other uses MB5, an archaeological site in Mochena Borago,
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 0x52d0f49c4137096cc402e94c22270f5454fcbcc97cd4b22c4c3747a4c112a9fd. 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/492d38bd-ea54-49e0-8740-877afeceec1c.json and https://artists.proofprofile.net/proofs/artist/492d38bd-ea54-49e0-8740-877afeceec1c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).