Gudetama, () stylized in all lowercase () is a fictional character created in 2013 by Amy, the nom de plume of , for Sanrio, and is a perpetually tired, apathetic anthropomorphic egg yolk. The name
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 0x7461d213dbe7fd22d9aa8522f17972ce2010576ef9c1a2856ad724173a7c7dfe. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aae522a4-00fd-4023-87e3-3d40317b7a20.json and https://artists.proofprofile.net/proofs/artist/aae522a4-00fd-4023-87e3-3d40317b7a20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).