Captain Kangaroo is an American children's television series that aired weekday mornings on the American television network CBS for 29 years, from 1955 to 1984, making it the longest-running children'
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 0x92e561a0f5611e8e7fd027050db54d87559efb4a92f3fe479dcbcfc2c507098c. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16490b1f-2b09-4ba8-841d-65a62f0940cf.json and https://artists.proofprofile.net/proofs/artist/16490b1f-2b09-4ba8-841d-65a62f0940cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Merry, Merry, Merry Christmas from Captain Kangaroo
A Musical Visit To Captain Kangaroo's Treasure House