Time Was is a documentary television series that premiered on HBOThe 20 HBO Shows That Transformed TV|The Saturday Evening Post on November 11, 1979. It was hosted by Dick Cavett with each program loo
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 0x838b5fe89795d59ae03c7beec42035210f595528d922ae63d612d1294d2e795a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90091b91-ca41-45bd-aa43-aae5e820a7ca.json and https://artists.proofprofile.net/proofs/artist/90091b91-ca41-45bd-aa43-aae5e820a7ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).