Memoria was the term for aspects involving memory in Western classical rhetoric. The word is Latin, and can be translated as "memory". It was one of five canons in classical rhetoric (the others bein
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 0xfd658943e4bfc84f3570d204c7cec81d755fb6926e0f373ce2e006a1001cf9ec. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/409edc5f-8d3d-4523-aa45-22d7574738bc.json and https://artists.proofprofile.net/proofs/artist/409edc5f-8d3d-4523-aa45-22d7574738bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).