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 0x600fcec0ff239a586f93964ec118e7d687efdd69b91ca69922198515053b7efa. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcbdd30e-5bbe-401e-9fe2-b4fdb2cf73ac.json and https://artists.proofprofile.net/proofs/artist/dcbdd30e-5bbe-401e-9fe2-b4fdb2cf73ac.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 0x449cbc67e1d9161e485f1557a9767cbdce37a67ff2e647b38c68e89d2605c16d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BK36M2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9281b18e83f938c658aefdc6785be2dd1c5c0d378dccb2aeecdcc405ecc2f5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BK36M2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7158a80b18b5a7b288c1a588fae4a983ede5ff369a23310289487f2e40ff98a7. 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/BK36M2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9281b18e83f938c658aefdc6785be2dd1c5c0d378dccb2aeecdcc405ecc2f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK36M2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449cbc67e1d9161e485f1557a9767cbdce37a67ff2e647b38c68e89d2605c16d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BK36M2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b84c60c84eb13e87588352f91b95dd76ab0dea797df24b8316a440a1f0ef895. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK36M2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1cc4fc62f666be579822a820879d4fa1221f5d361170b1b048bd02019b6ffe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK36M2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba754adf30f43f86bb50bf1dd5d37a93ab39ecf010a4dec302fa5a83f860946c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BK36M2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab896a35b06bdbb3281ae86499790daa4d79e78f9ac63b0bda2c06bc723fac91. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:07:08Z), 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/BK36M2400006.