Salterio is the Italian, Spanish, and Portuguese term for either of two types of zither: the hammered dulcimer or psaltery. Concept, etymology 'Salterio' / 'saltério' is used in Italian and Spanish
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adebd5ed9e2e9c8b291812d12e9a357852df3c82df8448004b74a204647032b. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc6c9683-5a80-45b1-a9f1-99f7303a7629.json and https://artists.proofprofile.net/proofs/artist/cc6c9683-5a80-45b1-a9f1-99f7303a7629.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).