Jass ()David Parlett The Oxford guide to card games, pg. 292-293, David Parlett (1990) is a family of trick taking, ace–ten card games and, in its key forms, a distinctive branch of the marriage fami
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 0x6bf091c8ca13aef7178b00fc03cbb85d44b350364f1daa79de55c8de2a90939c. 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/6b9386e2-4d52-4a0f-b8a8-c9d60908abed.json and https://artists.proofprofile.net/proofs/artist/6b9386e2-4d52-4a0f-b8a8-c9d60908abed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).