DEU may refer to: Deutsche Eislauf-Union, the figure skating governing body in Germany Diccionario del español del Uruguay, the Dictionary of Uruguayan Spanish Distinctive environmental uniform, the
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 0xf33e2a6609451d55052fba04d2b6cc153aa180a6d29e5f64ba320d1094b5cbea. 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/5a56274d-0da5-4a27-8c5e-1f25846f5395.json and https://artists.proofprofile.net/proofs/artist/5a56274d-0da5-4a27-8c5e-1f25846f5395.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).