Okej was a monthly music magazine published in Sweden between 1980 and 2010. History and profile Okej was started in 1980. Hans Hatwig was the founder of the magazine, which was based in Stockholm. S
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 0x5b5ec3f5d88ef126d53c3f91ff007f13c4d2e8d127bae977ce6249abef397915. 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/65bf12e3-7f1f-4e78-8b48-1c7bdcca4166.json and https://artists.proofprofile.net/proofs/artist/65bf12e3-7f1f-4e78-8b48-1c7bdcca4166.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).