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 0x7f355778582d92670c831f1388bdd54f79cc788a8527b7543e60c48001a2692e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06804207-3062-4380-8704-37936c100b63.json and https://artists.proofprofile.net/proofs/artist/06804207-3062-4380-8704-37936c100b63.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 0xcaf5518bcb699a07e4953d0d76a2669e19f1cae8cc68195bf8375cf0412aca64. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ32316791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5563687e15f7cf394ef511ab37956e5cc92153738eccb6c0bf3fb804e6b1fcbe. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFJ2317026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fa540ab562a72988ee23240e01dd2da498306f6dcde12b57a1aa4472d4fa69. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:39Z), 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/QZTB32300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65752ddd9898ddbd7477539eabd695869855d4dc7747766519e264d259679502. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFJ2317029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe7008dac9d80ec9b503500f0f9d2e1f668df91a2b96996912faab486918fa9. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:23:45Z), 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/QZWFJ2317030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aefc87476d1121e7b1762a04a85c866b2a5daa17a28212e7c2d50f9b679ad0d. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/QZWFJ2317031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae8fc468082b114df355b420bae2912150db298810a961582a3f1beec0481e8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:46:39Z), 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/QZWFL2594292.