"Planet Hell" is a song by the Finnish symphonic metal band Nightwish, recorded for their fifth studio album Once. The song begins with a male choir and orchestral background music for a full minute b
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 0x9fa90d667971eed05d1ac4ad139fb905bf3fccc58a12b535d14b04022f9e44b5. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e13631ea-3873-4e9b-acf6-f010c2504cf2.json and https://artists.proofprofile.net/proofs/artist/e13631ea-3873-4e9b-acf6-f010c2504cf2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).