Kasa may refer to Places Kasa (kingdom), a former kingdom in Senegal Kasa, Sweden, a village in northern Sweden Kasa District, Kyoto, a district in Kyoto, Japan Kasa Khurd, a village in Maharasht
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 0x3fcfe14c54ee7d3834f878c319d24d065cab5c651964fe334dff6a226592f984. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce0bad2e-737e-410c-aa39-867703438f30.json and https://artists.proofprofile.net/proofs/artist/ce0bad2e-737e-410c-aa39-867703438f30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).