"Hyacinth House" is a song written and performed by the Doors. It appears on the band's final album with frontman Jim Morrison, L.A. Woman (1971). Its lyrics were written by Morrison, while the music
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 0x47e64bea6cde74da069e520653a698030daa3524dcf90d5e3f1f5d7e87db6e59. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1c9134a-149e-4b7f-8b54-8e283d6f91ea.json and https://artists.proofprofile.net/proofs/artist/e1c9134a-149e-4b7f-8b54-8e283d6f91ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).