The Ajayu is a stringed instrument from Chile. It has 12 strings in 5 courses. It is tuned A A, E E, A A, C# C# C#, F# F# F# or C C, G G, C C, E E E, A A A. The strings are made of steel. The soun
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 0x88d10e4f00eab57abe6ea5698289702f1c5431e6fadc16ffc52f5a593df606b7. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4461e84-dbaf-458b-9304-4e43b36c519c.json and https://artists.proofprofile.net/proofs/artist/b4461e84-dbaf-458b-9304-4e43b36c519c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).