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 0xc9bedb074e680b4164bd1532de395967cac594c3f87fc7a5518e84dfa057168a. 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/a20f7b75-329d-4ccd-9558-4e41fc0e38f8.json and https://artists.proofprofile.net/proofs/artist/a20f7b75-329d-4ccd-9558-4e41fc0e38f8.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 0x22dc7d100a6000b386c881df122f9a9695b15011f0424c7ac56b7ebd7f50e96f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB92352783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c0ef057d3251ccaad1d1bf5591b065f570f73e4014f9eeb6ba5ca237c097ea. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFF2349136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd0356fa67e910915f19ae2846b5cde201664bbb35ebc3ed4d0e697b9c15ad6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:33:22Z), 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/QZWFF2337718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcfc8d43b70a35284b2b85365ff394666a2b015e9e8ecf158dca1f9becb7133. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNA2462147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5172b79ca04ce85c1ecde2d52cae54c644e53efad193a733140fa1fc5fba672. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHNA2462148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb1323af64912512245be52b9f0361c465b160f1a56d72a68cff5b4903f4f40. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHNA2462149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b5a39cca1f29697c67bd7b65011c14fd13bce3c967734f6c2b243735ec36c7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ62563114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bab0234396e3022b38f840b471b401aa83cc0b976cd23227516420c7a9ed0c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:11:15Z), 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/QZK6J2578372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8685786071739520eba09b1067902b45b9b81d85baa4ed7670073a20b2c65d1c. 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/QZTAS2586748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b52b66738d32fbd6ea248fdb2fe9e45e42a1d287f22b60b7abfbd860a373091. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFJ2539939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3841b5bb4f7fc9bbb028d2b46d846b715ffb11eeef66304fc9295bce65d85afa. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFJ2539940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb37d48a57f7865cc204d53b334e05b6f45c2b4562f9d13d6aeeef22cd5ac806. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F92513664.