Val may refer to: Military equipment Aichi D3A, a Japanese World War II dive bomber codenamed "Val" by the Allies AS Val, a Soviet assault rifle Music Val, album by Val Doonican VAL (band), Be
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 0xa6945a9d89102e41e15e4ef91d2dc582ff485b8dfd25a7abaf18cd7ea2c7b203. 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/d41878a1-5a4f-4a18-a045-9ca7bd9510ec.json and https://artists.proofprofile.net/proofs/artist/d41878a1-5a4f-4a18-a045-9ca7bd9510ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).