Ascanio is a grand opera in five acts and seven tableaux by composer Camille Saint-Saëns. The opera's French libretto, by Louis Gallet, is based on the 1852 play Benvenuto Cellini by French playwright
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 0x2b7611b9f357c8f9b65ee51a9dfc48d4a9ca18be01a120246c19f02351b5da83. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1550bde-122b-4587-85d8-e787c8bf152c.json and https://artists.proofprofile.net/proofs/artist/a1550bde-122b-4587-85d8-e787c8bf152c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).