"Mayham" is the 68th episode of the HBO original series The Sopranos and the third of the show's sixth season. Written by Matthew Weiner and directed by Jack Bender, it originally aired on March 26, 2
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 0x0fe7f61edce7c672f9b1d01f525bab5183430af2a740f7c7e2ed91e59c0c601c. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7843655-cd73-4d2a-aa5b-fca5e02a263b.json and https://artists.proofprofile.net/proofs/artist/c7843655-cd73-4d2a-aa5b-fca5e02a263b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).