Alta Idrettsforening is a sports club from the town of Alta in Alta Municipality in Finnmark county, Norway. The club is most known for its association football department, which played in the 1. divi
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 0x5ead4d584a55567493b1155f96fe7742ff695ad3688b04adde81fa1e0407cee5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37c12064-a464-4091-acc0-fe98716fbb0b.json and https://artists.proofprofile.net/proofs/artist/37c12064-a464-4091-acc0-fe98716fbb0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).