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 0x6ec406831123cb31204dcc6c90e094f564ef4e43b3fc3b6d033b927d815520d1. 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/41e61079-4ca1-4853-bbe5-f6cf23269487.json and https://artists.proofprofile.net/proofs/artist/41e61079-4ca1-4853-bbe5-f6cf23269487.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 0xa17347236a8be68ce7ab56b971d07ed524ad2bddfb8aeda5b8a28644682f6121. 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/DEZC62255152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08915408dcaeac4048b4141bbcca6a4ac2d4781b5e1ab6fb4468e09ec056ebab. 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/DEZC62035031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20999b377cf9a5a2a1082852c57e6b4bb3ce33fd92c60365e5dfc61152665123. 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/DELJ82039919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdf0b90aa29932e7188f315b50737dbb27f5204d6055d66f1e0edfcf8674748. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEZC62170270.
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 0xeae33559ac26becc0de910af094e06136b0621d355991b134406c945aa7f1951. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/DEZC62003789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d16f4b3c2d439230d73ac5ad4d960558d66f874ac19c9d83a5d65195f0776bf. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEZC62170264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ecc81b2ecbd9faf1fbd5e665e4e6d2dd3d3821eada672536894f652dedfac6. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DEZC62170267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae3b2734edc44e4f139199ee84dba9ff1971b3cb870ad6cf94579f91ebb1603. 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/DEZC62433436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc71b39227872ca5f30c842a4095e60414d30a4ba6750a2d6a67ee788cd33e8. 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/DEZC62433435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c504606d956964c0dbe01995d289bc7267b4b4753874685b291a58515133be. 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/DEZC62433429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ff4a2ff6c3517733bccec836a2e7c06a6ce87cdc9bb7689464e61cda35e17d. 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/DEZC62410630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc16d64c6b124881ed8572d8d9282cb805469718a982a9853e6d63b3543e1dde. 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/DEZC62492748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546b3aa31d49814960591b79ab42079acd08387986b984d104971e915d078fb4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEZC62492744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ba5e612c85dda92b0e986ea6fc6d123daf3e1b11f553af16dbce291344768b. 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/DEZC62492743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36527e5fb10f25f40c4f174b8da60fcc8f099fa2bc94b3124d74f45a2e0d223d. 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/DEZC62369451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dfb614d00589fa3fff4fb642ea6450099255f40d6068e55dbfd42114b17bb0. 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/DEZC62369450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836836930e902ef1f742f58736fb3f456e8a92eec1f10ccaff7012849af7b329. 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/DEZC62369447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf8ea6eb4bebfbf624f9d96acd2a1d84ea23529b01073b42f7d035014b2d725. 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/DEZC62351453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7433342879c9d7388c8bcdd8a2c1c834a69770dbc1ea9bdda7b48cd4eb2d885b. 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/DEZC62351441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bbe7177392015dff3abd15226e06db1251488efd0438c795b02e673c254bf6. 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/DEZC62351440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5216e678a09aa89616317f94b7cb56b2b1825e23c0e52b6e2a606a7c191ec9. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DEZC62345470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee80f8d5ef5854cd7108c6eee8348130f21b2f7ed2ecf1424e7d6ee763bab42. 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/DEZC62330697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5fdcce46212d71a15d6a3f77f3ccba2748b8967b5149b7c61de5251d8d8569. 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/DEZC62330692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6a4e09c56d9700c5a729ab8112b8961e92ac52dd6952e405c2b8edeb076616. 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/DEZC62203063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52477ce47f8b0b0ef6e1d23bf5272deb584c2723f19fb44001c589f743578896. 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/DEZC62295778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15831941b76cc46e69fd88c0bcb51af39e52194b3e6bb33e7b1a8cebe8cda780. 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/DEZC62292262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973af1416167d94125ae028371f59d54d614a08e813781c7d4cbff6baf41b04f. 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/DEZC62290627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b97a04da96b296298d910e7035024ec5e39f172f6b9a46c1952e531e3aec332. 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/DEZC62280697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834a6391b900ca26ce65a927ae22877dcd7c06557c8356cded8aad19fd7e68f7. 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/DEZC62585472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b02ee5050c8671125a28bd94416aac6fa087f192deffc67b2f4db725d26257. 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/DEZC62573551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491fc48ec1bee11d06e29ccbf584f56daf4cd1e8155fee4594894deee04b9213. 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/DEZC62573552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0516140a5db6985020b1ccbb89c31b0af39e02d7f412fb7ca4557bb56e46a2aa. 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/DEZC62573544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34094c24024c9f0e1e30537b193abf7de487d410c21e9bee067e22c84321d368. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEZC62573545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117ed89c934f31abbc353e6e0a3a00fe907faf863f91321dc4e64ab7c9ef45e8. 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/DEZC62463372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad81472cb0e47cf095fd5cddf5e4a9eab2d1f1e5632d3f6c39548ad72d40fdc. 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/DEZC62449907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1415a24a2b8bb0b1c341f3abfdbc4bcdc673be75b1742c9de52be24cdb943c0b. 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/DEZC62449894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59f43a156c770ac036f504176aa326f0610c599c9e5c7965c7cb1197d848284. 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/DEZC62442552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce72d730514544eafe38015e7196baf95d9d9ea4ccb7242a44d8e1339dbc3a9d. 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/DEZC62442553.