Papa Smurf is a character from the comic strip The Smurfs. Most Smurfs are said to be about 100 years old. However, at the advanced age of 546 (553 in the 1980s series episode "The Littlest Giant"), P
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 0x3b9188dc56cd7b497d73ac228c01be03b626a0559e613766e6fe4a3ee5781c72. 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/6ad7e654-0321-4781-95e8-9931ca3f564f.json and https://artists.proofprofile.net/proofs/artist/6ad7e654-0321-4781-95e8-9931ca3f564f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).