The phrase and all that jazz means "and other such things", "and all that sort of thing". It is recorded in print in this sense as early as 1959, and was associated with the city of Chicago in Frank S
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1539e40642d7886dc75c12043d19e5b091b1622d8e4ac2615d5df3147299615a. 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/73efd3c6-2a17-422f-b7b4-15f071b43fb8.json and https://artists.proofprofile.net/proofs/artist/73efd3c6-2a17-422f-b7b4-15f071b43fb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).