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 0x3565d153da632885529e11876ab891bd1a153c0c74aa5ee420d99f6482dfcd43. 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/9ff67b5a-f580-44f5-9637-1a67badf86fb.json and https://artists.proofprofile.net/proofs/artist/9ff67b5a-f580-44f5-9637-1a67badf86fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x0bbb6868cb110f9a095b61a3e8ed9a7cb5ba87d96fc94eead3848c74bea90fc3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:36:46Z), 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/NOJKB1204010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58b7299aca855a2fb71d84fe1556f59508a2e41a5d14102b38e7a5dfce768e2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:56:39Z), 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/NOMZ11301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a154687affa5fea16bb8be874dfdc9c863f28af2531899f881c09305b5b7ca0. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:07:30Z), 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/NOMZ11301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf483aa3b2297282c40f8c50183cae642aaf1e7b80adb4f1d57d0069d8f13a2fe. Chain 2 (Bitcoin): anchored in block 957640 (2026-07-12T02:27:45Z), 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/NOMZ11301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8537e29584a9d9ddee2586d168aa0e4ce22f6e92367b9d4c8d4b3541b0521a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NOMZ11301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e95606b7ce14f988407e9734bc14fe67f47b185ce9f0dd072a500c0df9d6bcd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NO5HQ1602020.