JHOVE (JSTOR/Harvard Object Validation Environment) - pronounced "jove" - is a format-specific digital object validation API written in Java. JHOVE was a joint project of JSTOR and the Harvard Univers
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 0x6eeee849a78b4e44be84090f2196a199411b4c383d425bd4877138ddbb48f622. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d440fa63-1c63-4ef6-8dbd-408f448046ee.json and https://artists.proofprofile.net/proofs/artist/d440fa63-1c63-4ef6-8dbd-408f448046ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).