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 0xc8b731345bf1f7dd0f426184368eb8e102defb90f8bc2081ee2ef027a48308e8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0bb3792-d96e-4d12-ab0f-fa8900355a0a.json and https://artists.proofprofile.net/proofs/artist/f0bb3792-d96e-4d12-ab0f-fa8900355a0a.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 0xc3328f7ea8c7d9a8868e2153e32cb417a2b5b05ba5aa04fd6916b3e971abef96. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:32:24Z), 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/QZFYY2438009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd6e7505adc93212eeaf6d6af1b73ca3ff8828172e72445b7cfc6e7a2844f98. 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/DGA0R2314364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ba48703fd94d9ad30b88136e92c57a8ea17652a513b6090b753343c95d7e44. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA0R2314362.
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 0xf742ff78e7ba03009cf8eaf19f197db416b07e1d671257058cf00a04aa928513. 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/QZTB42301720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827ad7fcdf4c420c5ddb7bc15a582a3715a32fb13ab5f31385a8c510cd95f340. 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/QZK6J2139984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e2c848149ca4c10d1b76311ba653312db872eb33011871b976dd0462cb9d77. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZK6J2139985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0285ade70802b69cf8ccf367590f559cc2503c15aaf420321419dd9d2f80c4. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:55:38Z), 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/HKG732150104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf746681f2a9419fa9fab374a302548b7d5704ea2347996e4c584514f80246a6f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX202110556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25feb278e828c2420feacae6edda08d46da804e6d21de52827f288ca4318c117. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRX202110557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3f85bef8be0c8ba911d1c7e95d94c23697202a7d3d1eef5bb3c30d0bef307f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:48:16Z), 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/QZK6M2110433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c7af1d590e07de0b14841a687f0c82f83a8ce281827a9fb541ccb9c1be78a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732102670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce9f2befee738b8d6f81fb1e31b4db25f7d435afc615f6848a2bd27f113cf49. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKG732102671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1d2b615fda8ce7230a70be7e5d514353d5cf5e4472dc70fa0f3cbcc08031c9. 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/TWU712002909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7656e45b46ec76682f75bfb6da277318f43763772321ac0f59cc42d54fc403f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732002092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffed122785026ef1ce45a0436d2976eb8b33b71fc9ab2c72a8853646440a6aaf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWU711904935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a65b87533277d1dd082a685a7072849310312838f194ea01e1d2b899733229a. 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/HKG732252830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de22c472fcbbfcd47e72059426989b0ae4f4211e76e1010366312dfbd282fc3. 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/TWU711904509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9c5dbb374ef0d010dba5b84a4fb7f190f7a51e9e910c7ef19b1d2867317562. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTBF2498764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dffd0092f13217b5e675fa5e3c27bb2ebf0766780c15632989392d032beb855. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG731907237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d4a2abae21ddd76286329c0d5bba56a4d5126243d895d8796421c6de1be902. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR59R1945543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c71b8711a49e738d2095c2c9a236e453ba12dc4f3c12ac766ca3578afc8d67. 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/HKG732002117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edecf0fcd6e6967f2c69ccadd93b49c6324768c2d04ef375f1b6bda6a443732. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY41951847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753b47b7b840107765f0ce1e88b9d8a636640125d857177b1619c4ca97443868. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FRX282416557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb692de17e1e50815093239b5cee3475fff8f67f35e6051d2ce006f91b1a8eb86. 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/FRX282416558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fc4ec443b1a9c14fb3aa6348c24039e641abf5a6be809636fe0df754faf567. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWDK51809073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b19498a9ee8e5accd1bee6ee8e88f2dd8a75fa2c220349a0045fcfce22e57d. 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/HKG731900900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84de9825505a7fbcd60485c5a061c3a699f82415ca07ffc6e355af4074cbc2c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKG731900901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc648aacc88e516f6cb9cb09449a3fe88ae35a8f46c9ed6514e1d7b220b74f26. 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/FRX452279447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11a10b8bbeb714a7383031f7b9e795cac735de83f1f52a6564860a9ae61a6f4. 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/HKG731907235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b022a220a4215514778b416237116c433ccc74d51b533d9a79c2a9824193ce. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/HKG731907236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c9f7917b047ad9fe8f7b40abd7ef7981ba1883e6f59647e5362b29ceecc742. 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/FR10S1925747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654ea76e9c5e4f62003a59837e5547617f3aef5becc52a079aff7e863d3aef98. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWDK51809150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41c21859d2db022de3cdc951750e3b6a2ba5b731da2c02c388510104856c1d8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TWDK51809151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb838441fe2dcd3df92e1d8ea535a19fd8c451480c3f7a497b65d846455427b8f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR10S1975189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba4d30f9b2502764096c050cf43a5fcacec0e0133ca5c6f52fd2004a26cb4d2. 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/FR10S1925745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73be75f778b790f50ca7555486626ea6139ad55ac9cc51683594c428a3df8d9e. 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/TWDK51809148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87ef612c380e6b0110530269139002205edb8fbef81f1746ee782f105f7802d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:14:58Z), 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/FR10S1922940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f966b42bb0d446f9cd952c3b691fe4af0376b8f979f6e8bc059dae769c64924. 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/HKG732001922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a2682576ea175a3ef7cac095e22f94ffef3431abd3fc9deefc20198705bff. 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/FR10S1925746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc60104c2e5c3a9ea80522645a98afe4f68e7bd35c05b74f964071ec12ad732. 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/HKG732358722.