The pindu (Stomatepia pindu) is a critically endangered species of cichlid endemic to Lake Barombi Mbo in western Cameroon. Description The normal coloration of the pindu is solid black, lightening w
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 0x2f2f45672562ec9874aa663854b386a6be2b42c6f7d7c4bbd4cc14d18a0c5db6. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27df7ca3-48ee-4550-8f21-0b1158ecf862.json and https://artists.proofprofile.net/proofs/artist/27df7ca3-48ee-4550-8f21-0b1158ecf862.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).