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 0xcc8bc23e201f42cdb25e6c08c96ddba7ed5f72847183600036f639ba89297196. 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/93fe0b8b-ef82-4485-a4ea-8075f495f206.json and https://artists.proofprofile.net/proofs/artist/93fe0b8b-ef82-4485-a4ea-8075f495f206.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 0x4dd84e8ce5c2b18d467dfcea9d9eff66de852d0eaab3998c9cf83f3fe57fe820. 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/DGA082219193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b32934440ed66a1da6c93ad958eb5aa2cecbd55da3e0e3c09d0ece05af3543. 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/DGA082219196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74108e87c60e4659d4bc273589a094f87c1b0c849c5a3f061d552e30f06c6f4. 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/DGA082219208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3859911d988305e65b32e2069d65ef5fa12561d943a983a2a4aec6ef793ff97e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DGA082219201.
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 0x29ddd7cca21941948fb47e6af194409005fedfb7bc80471b49817f7bf37bf527. 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/DGA082219205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b02f02fe8ee8c69af4d3c040474d3e3f3ab402ed1cade3bcf8488a25d1cda72. 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/FRX872469969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16592c0025843a908700600938b57cc133f8b3557a1c035c06ee2c6eab36af65. 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/US3DF2455643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd143d7c9727c70d45f52a116b20aebc0bbfb28f7c67556dec04adff44cdfc56d. 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/CH7812402295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720a10ee603a3a36d9f6b68cb7af02c643432457411e537fa346c481137157f0. 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/US3DF2456344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c08aa4e645692db6451f7d9e1d50fda56befcc2324459acb3938735c5766d9b. 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/US3DF2417340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0426f74ea7f4a954c9e781c62f0c640bb680105e54da6f28601d2df908e83a54. 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/US3DF2465277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e913efcc6775b990a5854e07235d65be8fc8272275a885956dcfe9245a7c9d9. 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/NL1LE2403499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cae57904b585fbb20b465661c0791ec14e77879d1460956b02b68f72a28ce0. 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/CH7812372257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df4e2e55d380c5b1786b1cf4890d2719694df993646fd097dedb285841256cb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7812372003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28ca104609719dd5801b49ccb9aa69f4802811c6ac295c6e2ba89cc1640335d. 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/US3DF2431572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc53ade14f112ee7527c94cb6f36eaf4ad2c1a6c5d32c9b7840ca11927580d. 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/US3DF2419838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d89866bed4574b331da7b96d52fef6ce363067723f3bb4a885d73cba3a9cef. 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/US3DF2401069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe424dd257590a41b6941e34c46e8ccca8a1061271a7fd486bd39fec8b7ecb779. 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/US3DF2409999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8533a99967e8d7b062c2b67ba8a38d66f24968f56fa6952ec287a31f9ef9b0. 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/FR59R2426903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6344ed14cd9cfa7c98f297980d4935e39011a9a782180b9741423b9fd53d404d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR2X42409206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5d694c1d75acb6fce1707f0ccc94696bd51bc9f215916185ec27b0f166370c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR10S2474687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5c3372bd3958fcbe23c263d342c41b2cad309d2bd32816aa54640648372157. 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/DEQ022375059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91129a01824fb63082452b0e5d683c3e2d62092feda83780de2f07890cc6fc2. 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/QMANG2205592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e88d88408a134d6bf339e6a1686609689f75082c98c32f6fd7af7b63fd006f. 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/CH7812359760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5848eb809ce45816c654e29bb358fa67e1d140e725eb2858a81b6bdffae02fe7. 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/CH7812359430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a7b5bbca381c76db5bda33d2cc3d43f3ea1b6f05d5840628f867ffea7670a8. 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/QMANG2214391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47466e8fc5780bd4c234b5ebba194b5934ad970f1d887d0029e204440a7bad7. 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/CH7812355589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f1e8463aaa88d146ea1f10d93455ecb6635da0c19af4bf856970e6a03d1e8a. 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/DGA0H2300626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd832d46d290f4cda261e955048792e253b8d3a1d96b47ca5cf3e0a6c2e41628. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA082374422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5df2257f102d9fdd756852e0196c19aaebe5b58b0b608b34f045fd424a11c5f. 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/DGA082315722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e653b844540ac523f0fe6236f61145352ac21eccd54a5cb28c71d69ae828107. 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/NL1LE2202622.