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 0xcee30494e384a80715405fec4294ac77f2e20d47d26950ef6e89080c66224215. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6381381c-7c99-40b2-af2f-0bfcd7524d4a.json and https://artists.proofprofile.net/proofs/artist/6381381c-7c99-40b2-af2f-0bfcd7524d4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Concerto No. 9 in E-Flat Major, K. 271: I. Allegro - Live
Mozart: Piano Concertos Nos. 9, 20, 23 & 27 (Live)
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 0xbd0f74e2be0af654eb2980eac272026b4ed28b4c453dc18476dbf58f11f48881. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITD542400119.
Piano Concerto No. 9 in E-Flat Major, K. 271: II. Andantino - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d8241ab7ce4b66b54490aad18b3d58db957aab8304336032c41fc1b6f58c24. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITD542400120.
Piano Concerto No. 9 in E-Flat Major, K. 271: III. Rondeau. Presto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa228127a14d32837481863ec9b04043c0d0e6ac744bd5fadaae3f9aeab456a2d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITD542400121.