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 0x4b08e2f0506754fbedc6493736be9363c4aa70dd9642acee648df0f39b7c85a2. Chain 2 (Bitcoin): anchored in block 953959 (2026-06-16T14:51:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2710e34a-ea87-4bdb-9e33-5138e89dd8c2.json and https://artists.proofprofile.net/proofs/artist/2710e34a-ea87-4bdb-9e33-5138e89dd8c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
From the House of the Dead, JW I/11, Act I: Přivedou dnes pána! - Live at Grosses Festspielhaus, Salzburg , 1992
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114b8c45ed4ed85141d40e3ee193ed0f5a1ad741618e029662cdea53d1d78278. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059232503.
Lohengrin, WWV 75, Act III Scene 3: Was bringen die? Was tun sie kund?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7200a8fa3b386da928c5266a8cc391c11657fb0e6ddf7412d228c20d2a64ae0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059131640.
Khovanshchina, Act IV: Gospodi boze moj! - Preobrazhensky March - Strel'cy! Cari i gosudari Ivan i Petr
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea0106c5f7867aa0246fe4852f32ccb669f98bb71eeebf94ca1a536120b3d88. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058931232.
Lohengrin, WWV 75, Act II Scene 3: Nun hört, dem Lande will er uns entführen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0098cf64621eaa0fc4f98b648afbdfd956e98330b721cd82a999db2905dc5292. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059131631.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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
Khovanshchina, Act IV: Vozle recki na luzocke
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10066c9f8837c6f47af7da75c82c063741d110ce40622ce5164b562da3f7ca05. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058931227.