Matchstick Sun was a Norwegian rock band, formed in 1984. In their first four years they were part of the Oslo underground scene, and in their last three years of existence, they released two albums o
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 0x2d022ea624222a9f1e4ee90b1d5db4a2c396ea5a32f980587a27d3995900fdd8. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/387ca540-6d7b-4c7a-b71a-ed371d02dbf4.json and https://artists.proofprofile.net/proofs/artist/387ca540-6d7b-4c7a-b71a-ed371d02dbf4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).