thumb|Theodor Plievier (1946). Theodor Otto Richard Plievier (Plivier, until 1933) (12 February 1892, Berlin – 12 March 1955, Avegno, Switzerland) was a German writer best known for his 1948 anti-wa
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 0xf45cc26aeffdc6c5b29bc448f12e417004c8669386af95864ea69302a943b48f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eedd9609-7f80-4232-81bc-348559869609.json and https://artists.proofprofile.net/proofs/artist/eedd9609-7f80-4232-81bc-348559869609.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).