Riech is a surname. Notable people with the surname include: Nathan Riech (born 1995), Canadian Paralympic athlete Todd Riech, American Olympic athlete See also Reich (surname)
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 0x67916fc882a3a70d343e202cdb24a0d9c0c2e0d2cd33d10328e8b5b36cea0520. Chain 2 (Bitcoin): anchored in block 953923 (2026-06-16T09:51:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c896c07-3354-49cf-9328-799b2b17d51a.json and https://artists.proofprofile.net/proofs/artist/1c896c07-3354-49cf-9328-799b2b17d51a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).