Tomb KV34 () in the Valley of the Kings (near the modern-day Egyptian city of Luxor) was the tomb of 18th Dynasty Pharaoh Thutmose III. The tomb was plundered in antiquity and its location lost. Layo
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 0xc7bb522d886f17bd85e53f1dc9d2ef1a3153e61def13d93201baa48270864979. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1951baab-6af0-4f81-a56b-099841757d65.json and https://artists.proofprofile.net/proofs/artist/1951baab-6af0-4f81-a56b-099841757d65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).