AK or A.K. may refer to: Arts and entertainment A.K. (film), a 1985 film directed by Chris Marker AK (radio program), a weekly program produced by Alaska Public Radio Network from 2003 to 2008, lat
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 0x7c76b031302f163f190cb9cc7eb9c4787b42b71885efc22c142002d703f60e9d. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b6dbac3-d23f-4e87-89c5-d08e4376d03e.json and https://artists.proofprofile.net/proofs/artist/3b6dbac3-d23f-4e87-89c5-d08e4376d03e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).