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 0xdf2cb049916fec4f6b64b5ca205af9de5c6066ade1ed3d7186c7c5fa6009501a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb9115ac-45d7-4dfe-acd3-b72e0d7e002a.json and https://artists.proofprofile.net/proofs/artist/eb9115ac-45d7-4dfe-acd3-b72e0d7e002a.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 0x03cadc9e59f7b95a74f11e9c3d28e5da1d6ed606ef8c8e14317c9aca41072142. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/FRX871511417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd4cc723575d5d75f280c48577bc25ed037882dfe53444f5c3cb2ee27b3961c. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:04:49Z), 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/FRX871511422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d1e60ed832a628caf31fad430b1b222b29326a23684818e5502608fca4b244. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:39:39Z), 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/FRX871511427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7252bc3eec9df26b9adc8c5f402e744ff8b4c924eddaf59aa7dd9576370795. 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/QZ5AB1737712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbc5249d846e0fae31640d5b973e28e6e3eb27f5ad3b8545eca875a46ceadb5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZ5AB1737747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9a539e50626ac97ccdbad86834b463a34f621b6324679f381bf1e23883de63. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZ5AB1737715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34348e237f2e1341b60470200d70a983bbe0213694350f55cc3dba48ff602835. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZ5AB1737725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bee891038466022ce126d6aaa958577c40d16e2380d9e6aa36512628a76645. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZ5AB1737720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3188023738abe138460febe0a0a71757ab351f5fc50e423864370855b29c9fd9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZ5AB1737721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c83628ff09707616d5ba6bafc5b7ef9026059a62660a05f6cadd2e673d6c8aa. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZ5AB1737777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bee891038466022ce126d6aaa958577c40d16e2380d9e6aa36512628a76645. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ5AB1737720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c471a0c8f724d736ef61aa80fde4eeba5f5fd9acf8bc9a80f912d599a86ffd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:37Z), 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/QZ5AB1737722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9285b9ea2fe91cb662307cd31511bd556f4f11edd38581d70b905a919d43dfc. 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/QZ5AB1737726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f45d3b3cd07e6ef9ede1f0cce83f8bcfc48552e5f959fcd83fb1c03e06f850. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ5AB1737727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474c1b84fd79be66a000cba97bf0cb7f012c99a4778ac43413309227d9c1e4bc. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QZ5AB1737733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbc5249d846e0fae31640d5b973e28e6e3eb27f5ad3b8545eca875a46ceadb5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ5AB1737747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c6c09e7ee9a703b19a4904675a46a75a01f03bac6cb0d67a4999abcac6e0ea. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZA5B1737749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57efa518b98313b86e48b03d786a339382f48d9ab9051875375c15641664331. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ5AB1737723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a50c358e74bc3bb6f3d815d15f621eb53ca691c713edf5987985955c9154f63. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZA5B1737757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1554b1b6486bfa266a5f8764e7f982e6e497103291ed6209ef0ff84802a360. 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/QZA5B1737759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f7331433d8cfa26c54552802e5e7776f3a79f743964e28c6a75cd38b466ff5. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/BK4DA2313442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe722ebcd2f51f57b4884d3a5b494a1154eddd444e854699d03d3b357ac5d50c6. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:37:20Z), 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/BK4DA2315640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9406c2c958350e1c516fd78835d39b702b7403258f0a12aa1277d5e8e730db60. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/BK4DA2315650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe305f1bf51ac8720ccdbb9683d236690b3143fa4dfd790d469db9bb775311f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/BK4DA2311761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373c3469be61d505a28833bdd0a820b4bd235cc4ba026f84f3c3200423881478. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:53:06Z), 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/BK4DA2320646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47a75210e941335c3ae57468e7c73dc4e043a83b989dc407844fdc5f115869c. 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/BK4DA2402155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fee9b76626ab03c9c254ae0fa0a877f2b8d4ce9aaf61859c3e36520847b696. 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/BK4DA2405261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425cd3e7efecc3686593191858768a5b9bee819e4ab376d0e81a1066d4b9c61d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BK4DA2416649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ad5b93f31dffc8d7f64a8356cb629823b9b1c85a02b59ed091f1e705de0f6e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BK4DA2431416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde194e45c8dbccc2a099ff4aa06dfeb6e70132b82fc7780a541eb979a9adbb1. 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/QZWDW2555897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f11640925517d696004a69a27968531e5a26824fbbd4279c4d82d94504187f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BK4DA2551526.