Stefania is a genus of frogs in the family Hemiphractidae. 1966 is the nominal publication year, while the actual publication year was 1968. They are native to the highlands of the Guiana Shield in so
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 0xeb8261f96ec1b74f66082af53724be29b9afe224dd3718afa710b0a359e92177. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8890f025-2828-4fe9-9ff2-36cd668b8057.json and https://artists.proofprofile.net/proofs/artist/8890f025-2828-4fe9-9ff2-36cd668b8057.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).