Gagana is a miraculous bird with an iron beak and copper claws featured in Russian folklore. She is said to live on the Buyan Island. The bird is often mentioned in incantations. It is also said this
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 0x3bfb240f49671a6ecaed2d24431b912715efc4b44935f220d46161b2c07e7555. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/399a586f-f71f-4e06-a1ec-3b7ad5322355.json and https://artists.proofprofile.net/proofs/artist/399a586f-f71f-4e06-a1ec-3b7ad5322355.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.