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 0xb1424d464400a3ef986a63db710ce3473da02299edd56a0c4702a523ac874f5c. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e1a8403-4f3f-42e8-be6e-31ed2301425c.json and https://artists.proofprofile.net/proofs/artist/9e1a8403-4f3f-42e8-be6e-31ed2301425c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Art of Papalin: Various Works Arranged for Voices and Recorders: Part II
The Art of Papalin: Various Works Arranged for Voices and Recorders: Part III
The Art of Papalin: Various Works Arranged for Voices and Recorders: Part IV