The papermouth (Enteromius mattozi), also known as the silverfish is a species of ray-finned fish in the genus Enteromius. Description The papermouth has a silvery body with orange coloured fins. The
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 0x264d6b29825bc07b38f8bea454b3ea2b7afcef5bf60ff9eae81700a3a0bf24d3. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94c96435-21af-49d8-9037-707f533ebd65.json and https://artists.proofprofile.net/proofs/artist/94c96435-21af-49d8-9037-707f533ebd65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).