Parzival () is a medieval chivalric romance by the poet and knight Wolfram von Eschenbach in Middle High German. The poem, commonly dated to the first quarter of the 13th century, centers on the Arthu
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 0xf03281ad38a9488f1c7947ff314ada51cc59a9cef231a543802b5ec6b31b6666. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e132ea0f-9edc-49ad-8ce6-4f1a72394bb1.json and https://artists.proofprofile.net/proofs/artist/e132ea0f-9edc-49ad-8ce6-4f1a72394bb1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).