Casa or CASA may refer to: Music B.U.G. Mafia prezintă CASA, 2002 album by Romanian hip hop group B.U.G. Mafia Casa (Morelenbaum²/Sakamoto album), 2001 Casa (Natalia y La Forquetina album), 2005,
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 0x65f2bc8fab3a7a9905a36b0020d703ec8b570158d29382ac3493310f077e54cc. 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/82825f7c-f228-4e95-80d9-9157b72a4e4b.json and https://artists.proofprofile.net/proofs/artist/82825f7c-f228-4e95-80d9-9157b72a4e4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).