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 0x480572f20563416701b1a632c72d85b2f206853daeffc40834e4951098768f50. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ed8cd9d-8228-42ef-83c9-a849c9db1304.json and https://artists.proofprofile.net/proofs/artist/7ed8cd9d-8228-42ef-83c9-a849c9db1304.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 0x18d7e4e1bb453647394df994eb2e4d467572e3b4a79a07bc0976dc6386b26480. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX202205388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88179bc7e2d8fc133ad42b889788c9fde831d034a98b101ce9f2705ea6bb3e4d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX202205387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b26f70c854b076df3ab21a7fe1c0915c6c2e6c5f048b12ab8a95fe173c2ccf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX202205389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88179bc7e2d8fc133ad42b889788c9fde831d034a98b101ce9f2705ea6bb3e4d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX202205387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d7e4e1bb453647394df994eb2e4d467572e3b4a79a07bc0976dc6386b26480. 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/FRX202205388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b26f70c854b076df3ab21a7fe1c0915c6c2e6c5f048b12ab8a95fe173c2ccf. 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/FRX202205389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28447c269e81e71566864f70139527039d4d10e522eb211491ae55e3e7c37178. 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/FRX202205390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c0ede537590a845dc4c18ac2cf6f733bbe5923a32cbf3ff304801d7cef92b7. 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/FRX202205391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf767fc9e8d4a86e29a77aad681e924d5c36d19cac6369c6621ccfbafb630b652. 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/FRX202205393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afea51df82498958eebe38df06f93a57510af625d439288fb9c9061e07b9dde. 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/FRX202205394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54356f524b3bbbdc8b5a66994c3ff3c348405eca1a8f0badac8eb9dd6182ee96. 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/FRX202205398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac76bcf3da72ab4718364d1d53cd10ff87325e193b41495ee2dfcbc5d87b88a8. 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/FRX202205402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6719b88bb9146b3e9d577401f6f617c032108ca55ec3f4b65f43b0288d07c876. 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/FRX202205404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb400e952d2387f23e5aafc06014a9d550b2afd870a9a5a4b2c0dca28de713a19. 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/FRX202205406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a6a813b9ad620597417d16ad45036802dc99fe41e9292056f0a11619e19a35. 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/FRX202205417.