Joh, JOH or Joh. may refer to: People Juan Orlando Hernández (JOH, born 1968), former president of Honduras Joh Makini (born 1980), Tanzanian hip hop recording artist and composer Laura Joh Rowl
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 0xc9e357ef3ecdddb4a943fd9806c4a71346308f2f9321890d6fc6ac3d1df33a0c. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc80adc8-8089-434a-9b0e-45d3420b947b.json and https://artists.proofprofile.net/proofs/artist/cc80adc8-8089-434a-9b0e-45d3420b947b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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