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 0x7924e3250824924d6a8b99565b0e1304c034ec48b435b1aab82bf344a1edcc7c. 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/ebbf446a-76b7-4e4d-a2ac-d0d4f45c2e2a.json and https://artists.proofprofile.net/proofs/artist/ebbf446a-76b7-4e4d-a2ac-d0d4f45c2e2a.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 0xcba094d277b5ac79ca2ef81ac93b65aa1aadf9cf0b99fc1814878f333a17941d. 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/QZRP42378819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde7a4c13329e23d68f16e1b3f727b6ff9803fbcc67b1f68a477658885d25e09. 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/QZFZ22208545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ad5d65ee39bfd1824dfdecb97dd27db5f7e1a74d1157e6b46f1d4f8bcfd161. 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/QZFZ22208547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aa065d58d9baaafb04f186a0f08256ff642aceae6e1a0b032bbce6924d2a8d. 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/QZFZ22208551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a2ce59962dc8f79affff52250ba52bb81e9d7b8886b42418fbfaed585447ff. 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/QZFZ22208553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8e15ae89cb543daf32af6d80fa6dfc1a8febdc431acf51e8fb70322f429a97. 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/QZFZ22208555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca5ee0981e34b57dc002d90d10fc18ca078c2b273945d6678c9b2649ffe3019. 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/QZFZ22208559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff7b62ef62547479afbe1666aefeffdf6a5c130ecd688a12be86dcf186f5d31. 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/QZHN92502717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1858dd3b544e98e32f16105457c338e43fe079018617acf343a148105ba678c5. 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/QZHN92500526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b62db2c0d0c8aa1401a77d8831bfd55e6926624005dc0589685af2d47b9ffa. 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/QZHN62547969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed5aab9368a430e07e6a8c8d81e96e4abc163f088a2f9e492f4a9e2eb21ce94. 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/QT3EZ2472247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260ed401bbd147f1f7a74f0dfabad41eb79b5807e218c5fe0da241bdd878fe1e. 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/QT3EZ2472248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bebcfbb0424a772186e31de36d697a94a09e64c4438693eb8e1b4446e084e1. 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/QZWFF2496069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596b0a4510d56d652a30659b837c5e9d64d695238b7965a2bd5a06b7d100ba7f. 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/QZHN32445623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9736cf28fe0615588f59e1956f52126f001b850421ed5422094c3a7c930819a0. 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/QZHN82317257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e0418e845a9a6f62c1c4faf9a7876965d76f2556a313daa0db0cf6cfa66081. 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/USUYG1446101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc534000cf67e0e029c09c3cdc619393712864b1742589366044f6c95f61daf. 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/QZDA42458598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fd058c2f0d5179d4b0a54c2174d7a459e108229df88009394146bf9840d26c. 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/USUYG1444859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b2749d0240d23ef3c44f07979fe6e6df784fef58ff84bda90901d7242e0b33. 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/USUYG1444753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c02169d7ac2ccc018767c8f330883dcceb666503e6deba6437092a0ba145c1. 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/USUYG1449071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e0418e845a9a6f62c1c4faf9a7876965d76f2556a313daa0db0cf6cfa66081. 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/USUYG1446101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea850f2d526e1725fff9e4e0ebb0603e9e0edd358451857ff248c60c0dd46bef. 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/USUYG1444858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73da217730ade3c67cb19fd7b48bd88038b3bcab322c97baba143dacd6c7219. 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/USUYG1447983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2cda073a6b4ff0f2a44a878e350be08d473495d9ff02044d89f99b6346579f. 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/USUYG1448357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6837a6211feaaf147ada2d3403367b2bad7a2c670903ed0722ff48fe74922fc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUYG1448653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9050da9f4b00f8e51def2a530b1af2d15402cfaae9b12433ee4997b951bd879c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:35:23Z), 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/USUYG1449944.