Gumi or GUMI may refer to: Gumi, Iran, a village in South Khorasan Province, Iran Gumi, Nepal, a village development committee in Surkhet District, Bheri Zone, Nepal Gumi, North Gyeongsang, a city
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 0xf49dc438554dfa5e0156b4717d80c2be7f7c91ac851c158dd31f252abba09d58. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b437fd5b-e871-4d42-8f52-c10befbd827d.json and https://artists.proofprofile.net/proofs/artist/b437fd5b-e871-4d42-8f52-c10befbd827d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).