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 0xeefabe3397fda476c0e558043bc637d9430bdc7c480ad7aa2c1537fc3f1a61cb. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e83c2557-e3e8-4947-9c39-5290a88788c4.json and https://artists.proofprofile.net/proofs/artist/e83c2557-e3e8-4947-9c39-5290a88788c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
D'Annunzio (Dal vittoriale alle piazze, mi chiamano)
Ungaretti (si sta come d'autunno sugli alberi le foglie)
Pirandello, chi sono io? Uno, nessuno, cento mila
Gabriele D'Annunzio, La pioggia nel pineto