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 0x10a78ab13d1fc9a0b05148819e93ace2cb77d8c8a53c336c320d53c488e8ccdb. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2f53d43-41a8-4f45-8351-64359e5c229d.json and https://artists.proofprofile.net/proofs/artist/c2f53d43-41a8-4f45-8351-64359e5c229d.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 0x7e60c63c1b6e1e3d68446b8374ad24bf0746f30b09d882c5946b9cb21aad14eb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/MXC041800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282c5975bf1ea6484d34da4a9f241714d7cb9b593edfecca0a790014a664f893. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:39:24Z), 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/MXC041800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf3c8ebbadfc01236e2ceeb2d02092832ccc82bc7b3fbd6ac4af75867a0f0d8. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/MXC041800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2913a81884d3128985e8dcb7614db1e1425e55c7c3af5230fa560d012790c5b7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:08Z), 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/MXC041800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160ddd9100fdebb9024041e76dd9c52a97f97bc2f062512594449afde2376478. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:00Z), 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/MXC041800012.