Sasa may refer to: People Saša, a given name Genjū Sasa (1900–1959), Japanese film director and critic Shinzo Sasa (born 1935), Japanese equestrian Sa'sa'a bin Sohan (598–666), a companion of Ima
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 0xde558f02e2bc75e07fd699c3e6ff4778762f933a40976f59ea18c608a7c2e56d. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8d136ed-32be-42c8-b16e-59fc50257b17.json and https://artists.proofprofile.net/proofs/artist/c8d136ed-32be-42c8-b16e-59fc50257b17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).