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 0x0f3ab97eace7a7f68738a48640e574164ba142c770178600144f419f1a9bb94a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/069853ae-4cce-471f-9b64-31ddab303ce3.json and https://artists.proofprofile.net/proofs/artist/069853ae-4cce-471f-9b64-31ddab303ce3.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 0x094ab2ae8f2819c7d94f0f67e94c165ca0af7b960514d6ef0eb9fbcc1215c445. 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/QZES82575568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8d3a88a8416504d8940be9833d1f083e56a2e43b5cccb56801aa806aeb72b6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ7Q2463163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d6978b63018f6a50297650e6007784fd2c3a63cbf23fcbf7391a296d21c489. 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/QZZ792485028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd95726ebbfc0f3ddd3be7de08d505b07a137f47b837b76792eee09ae62477b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFU2480661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39937b8d662103b53af3f0d92f5ff5fd267bedde74c38bd4ada9bad580c2ae5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTAW2482702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3955b3ec5a637ed5ac3dea63e93f784f8486f4082005c29b221a361475c9b4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNWV2485907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40cff261f5449e2de923b4787b4b7855e1866285b4c646e6491d68ab2b2fb8c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN72485969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100bc3f138162f1650b7cbd5e4be51aa34bd4e5cef0d68b32e2db3193ec01c37. 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/QZDA62338989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9115ab0d51e81c34cfbc811b09d5337a361eaa9e8cb7eddb3ce7256efd0c87. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZDA62338990.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68f3062e97522ae6c6f2605af086f7e7eede096b78ece4b031bdd4763364753. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZDA62338991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e86f418f8fd459192e8b3b96992677cea74b11443af264b334fdac3ba35144. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ72316058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd1c91288af93c8780a7f77921798173cb84a0b3b3548f88772908d06bfc93b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB62217091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0d00c14f44aea52101113936bca3ca46b009866eee0dbc1b33fb5a1ad3b67b. 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/QZNWR2233115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775e5e779ba43238cf6919cd2d08fef87d63e7f2f349840816515c9f68409ef5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52271462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7037f673390a092c1bae3497fd233646bff9c2ed88bdb8e237ca2e198cd4b7a. 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/SE6TI2198656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a4edf547fc0600532682fa3ee7a61d8bbf74d8982764b448fe05f5ba5ad6f0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYX2181743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc220d12b95b350c45977eeec83073a373f5ca27d25926fcd694175b77a2e1f14. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWX2137567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603f249048389bf44afeefc681121d3bc01c0a9ea7c48c566f591032cd50d332. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWX2137570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201bffcdd657b55033958a04c6d074b4440179239d31b0fb9cc4b4e83f58fdea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWX2137572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6404ccb1b18096fc62c4da74fbe344077e986f4f7316a457c59bd1c773b778fb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFL2446248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8623fe102bea1fa6b9219f576e613b968f1782e67a24a1b84807751bbfdd4b4b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ7T2428881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076a37c1d8f6bdbe2eede89f98cf8447225d65e1569a3a7b606a9322bc079b7d. 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/QZHNB2587996.