thumb|180px|right|Traditional location of the Idra Rabba Assembly, near Meron thumb|180px|right|Ohel grave of Shimon bar Yochai The Idra (), is a Kabbalistic work included in printings of the Zohar, a
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 0x04dae66d26b6ba2f9154d163baeacd064116c1b7999df3d33dd07e04e08efb8c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f83600c-b30d-4447-b450-e0db9f962d2b.json and https://artists.proofprofile.net/proofs/artist/8f83600c-b30d-4447-b450-e0db9f962d2b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).