Allmänna Idrottsklubben (English: the Public Sports Club), usually referred to as just AIK and internationally known as AIK Stockholm, is a professional sports club from Stockholm, Sweden. Founded in
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 0xf69075c7d10c999bf103db89e079f21d3dab168aa06ac2e9a83d7456f3fdcb88. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0fb6136-cf67-4e97-9cec-b821d70b2cce.json and https://artists.proofprofile.net/proofs/artist/d0fb6136-cf67-4e97-9cec-b821d70b2cce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).