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 0x953ef802563035e77f0c28ff27f912d3f9d4b2d35c04a8b460450bde279af6b7. 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/556cbef3-4e4a-4be4-8f0c-a5498737fabd.json and https://artists.proofprofile.net/proofs/artist/556cbef3-4e4a-4be4-8f0c-a5498737fabd.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 0x2a2583c2175cf8c507e692fa7ae00a094f541ed50ef2f9c7fb5797da5f66d608. 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/NOUM71400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33163910a096ab9ca3fb9a99bde4a3c0a7aa4d40e72881bb1f7b7bb660ee525a. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NOUM71400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f102276f1ca1e20875df59a748df89cda088a2b44e89d3ce81f4ed09f9be1e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NOUV71400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa1f0f9c7f4ea3301717000251757d51617294b28cd5255c7a221e50ec8d2cd. 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/NOUM71400569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb84dbc27188aa26bf63c741c7a4b3ca593c5e887b064db1767448db6f5c4177. 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/NOUM71400570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b1ad8c4215b743e0f88a0a4ab8d37394d2eace66fcdd424f767980a38d243d. 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/NOUM71400554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ab9d34e40438a67c22fe5b1fe2c405ef4855b6d40db133856f65e94af78d29. 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/NOUM71400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b32788532b4f3bfa13fcc3ff9568fca3ceb88f878b66cf9023f28de8bc37f70. 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/NOUM71400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf464cf97b5ad8167256775b629850a920cd1aabc569c38400bb0f1909018c15. 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/NOUM71400573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aed98328cd130db657767cf417dcf6b7141ec86afa863d18fcf601491fc9f79. 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/NOUM71400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fee1c4c90865cb9c21c4e0ae7fc63f5dda6b2fc8ee8883aa591899e4ea74580. 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/NOUM71400575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19e3a3353630fb80f6bd574d7d63c58275428bfe76dcdb61020309e3a289f7b. 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/NOUM71400576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a8c5e724c3e43b18143a4d309af85692dad2bd1011643d830c5a3830eca6ac. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NOUM71502859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d8f9f525f7485110605d65783517dfafd2b4132bc511ddeffa7f15837b8a60. 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/NOUM71502860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ca18c5f2f7ab7e6bea99c62bcb2ca5796a2a7189d16640e142b895910becf3. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/NOUM71502862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb1a251d69a5338561fd27a7a74300d1ea194605e5377c0c39932578038196f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/NOAGJ1746020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b87c4c0d3894a69cacf7c1b4b27ad7c3dc55cd735366be76a00658d7d4df2e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NOAGJ1746010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa119f6bba49d7acaf707396955fa79619213715bb27a4366703a823438c98fb1. 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/NOAGJ1846010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491efa60b598582d4ea6e8fd9cdb9b8eb24f8e69502a1342181232d73f751feb. 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/NOX7F1801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3564e7e9e1f5b158c071a7cb55185fd4d09c25091bd65bfd7f1324a1ede6e617. 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/NOX7F1801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62054b57cfe492e2c48c3a1fef42b66fd5e07546be1b4328e7687ab6c4b5f51e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOUM71900475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832a7aa06c9bc822c211ef2ba9ede465efa9e7154c450cf7c3a485b2086a9e5e. 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/NOX7F2101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd794067ac0aa8698d29516939ae658d7c2d1a7006dc5a3e302189e009db9a0. 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/NOX7F2101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa226aed7a335ee7100ba732df704ae5de6c018dddc2eeebe4cfd402afef41eac. 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/NOX7F2101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd416fd0d61b93d8204f6a33ddf6310e56eea6116242be611c2262f5fec97885. 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/NOX7F2101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8933e374b740bf818f22661404e3e2075b8ec3b8e7bfb363c42af9853c809c2a. 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/NOX7F2101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb528a697362c08a41ad2a5b89a2e3a6652fb73ac3ea4a921b9538eb831682b4. 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/NOX7F2101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6cbf348e6770b80aa71f387e045e0594bcda45d4b581587d9e63ad6480b162. 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/NOX7F2101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225ef24f3e292e22e9eed625bd50a5653d76b19f73ee5c1cd6aa2238339f9345. 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/NOX7F2101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fb94ae443321fc380219a386bf0e6b671a75b006a2dc3b11378efe4fdec7a0. 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/NOX7F2101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4596d77d8725fe6a0a546bd7ad607b3a5e9f94df51598667e122c7822eef2519. 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/NOX7F2301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93b877bc8f6154c5428ea3be833576e3883d75b958ff24c485802873a6e61dc. 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/NOX7F2301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4f74fe28a6e38f4338e947d7f7a28f3995ee254cd82b997ec3e03106e01637. 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/NOX7E2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3202f1478b0a845e18e59b371445e3293375d62c219058ed221850da34a3db. 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/NOX7E2301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dab6d94ab81aa32f4f1cb2b2cd512add59ce7a4efb716128076e365d815af8. 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/NOX7E2301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9412f91d767287709a2f5d991a85a71f891c0dcccf7f480224e741c198289b. 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/NOX7F2301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6130c5ec8af2dda940e3ba9d1359405c861003928dc2e4958b709dfd73f7ce7e. 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/NOX7F2301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50418938e117a37d73b731402faf1788949b8d3f2b63672c651b31157fb904f2. 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/NOX7F2301090.