A1, A-1, A01 or A.1. may refer to: Arts and entertainment Film A-1 Headline, a 2004 Hong Kong film (English title: Our Man in Jamaica), a 1965 Italian film A1, a 1999 Syrian film; see List of Syr
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 0x066db8d330eefac9350a24fed8d9030814cca7060e8a3f109312ee9885c9180b. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f22ab78b-fc74-4d3d-9a8a-ddc3bd5bfd7c.json and https://artists.proofprofile.net/proofs/artist/f22ab78b-fc74-4d3d-9a8a-ddc3bd5bfd7c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).