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 0x7f0a45185126bace43fe91796f93a07948c24bb16eb331dacba24f6c2c6f75d2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f15632f-6736-43b1-9bfe-df3b14626d7d.json and https://artists.proofprofile.net/proofs/artist/4f15632f-6736-43b1-9bfe-df3b14626d7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Set 2: San Pedro Square | San Jose, Ca (Acoustic - Live in San Jose, Ca)
Set 3: MALELI!! at San Pedro Square | San Jose, Ca (Acoustic Live in San Jose, Ca)
Set 4: San Pedro Square | San Jose, Ca (Acoustic, Unplugged)
Set 5: Rafael Unplugged at UC Berkeley | Berkeley, Ca
Set 6: CHENZO at San Pedro Square | San Jose, Ca (Acoustic)
Set 7: Lucas Tecson at San Pedro Square | San Jose, Ca
Set 8: Lyshia Megan at Ameswell Hotel | Mountain View, Ca (Acoustic)
Set 9: Calico at Ameswell Hotel | Mountain View, Ca (Acoustic)
Set 10: Melinda Kausek at Ameswell Hotel | Mountain View, Ca
Set 11: Kytis Live at the Ameswell Hotel | Mountain View, CA
Set 12: r.vega Live at the Ameswell Hotel | Mountain View, CA