Ebru may refer to: Artform Ebru is the contemporary Turkish word for what is called marbled paper (a method of aqueous surface design, which can produce patterns similar to smooth marble or other kin
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 0x27140ae4c68355f373d95c5282789ff2256d2d4426e29684574ad23015f507cd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64a37fdb-f356-4fcd-b2e8-411ce0194373.json and https://artists.proofprofile.net/proofs/artist/64a37fdb-f356-4fcd-b2e8-411ce0194373.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).