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 0xf5f15302dc1331fa42a90bcbca989a82ffac080b8d654b880dded13e33410429. 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/c86dfc41-3f89-478c-af68-02f114b68398.json and https://artists.proofprofile.net/proofs/artist/c86dfc41-3f89-478c-af68-02f114b68398.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 0xa5196ce16b9db2c4c68082bceb8973d79883985c6f99b02cd3445221c077e6ad. 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/QM3DF2296715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351570b7687d6c535352b522ca3a9d1516dccce37bd07187138f7fd11b15d43c. 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/USANG2268529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55e6d8b775bed4bbbc55b0bec36dd8d60dbb92228ae4e1d0a1fc35783d767cd. 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/USANG2153815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492cf39574d3ce095cc6a3faee8b8be79190e715b07f43267985bdce70d01240. 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/USANG2153811.
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 0x6c2bc186c0ca693ef76746f5dfaa36ca8d5623adafdf57de0250421b958f03c5. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USANG2153812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b821b9bdc26512f05bd97f633c313f6c6416b781f61658315e3f12e392e975. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USANG2153813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85da53a2cf8ae90225baedf6cd0fa2950f4100819556cec48783dec8962a7a3d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USANG2153814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dfd7a235902afba78e2ca924b607d82c0e2a4d9db583e063ff4cd2624515b4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USANG2153816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9165aa9acf3b957dcdb63ed1fbab9d70285ba60c68833c47988e9fa9c2cf6b94. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USANG2153818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efa20e4fac17e72ce3b54d083baa68aa6ce86a5bec77e7c34589bae6169d7d2. 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/QZMEP2046937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035e01d721f975cc0ac0e5dd77f374fdd4e7794594cebed3a1ef84c388e86e30. 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/QZMEP2046940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf83c0befe3fff0fc50be68679f05f220a43439935e3b9f2a6d3b2c2ec6f7396. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZMEP2046939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b85a408c69615c04c24fc56c9372ff2467c0c63c9c180fc87043fbf7670712. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZMEP2046942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6043422d11c875eac51ca7edf9ffc503ae666588a02646eba0059a1aee70be26. 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/QZMEP2046943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5e7cab23bb86c5e2b40339c28e497af9d0c5b4f2492ac95d005649b8ade4f2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZMEP2046945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb00ba5acfdf68ee35116642fa40e8170da7a731395ada3b39273cd447fe11c. 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/US3DF2118661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d78e1baaf489599bdd941dbba88639fe31bc00c061b6f2fbfe9ba29d22d7c62. 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/US3DF2166974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d28df648caeae9b4143d39a4157e094b3d1bd6e91d1b42220164c90f17326a4. 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/US3DF2166976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2304cee816b6b9c302335158d47db273ee91a3d61796d48e4c791ace62c0631a. 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/US3DF2166978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde81979d59f4d7d388ffdeab095aed92867f96b14c6c1b4f47a8401ff6dccc2c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US3DF2166975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e9400a1604496cba1ad9da618dadde06df013e08456941f345dd310086f3c5. 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/DEZC62336948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768d7305d5eb0ce4537ded9c74ac349b1c0d0946231f366b3a0a660ffdfc4f50. 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/USANG2237294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e90c49071955e3075186987f62ced650f0d11a866636081bdad56b355d673a9. 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/USANG2237291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e42a473e56c35b760aa8f4719cdc1c958a2a8ace010c63629cea81487cc638. 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/USANG2237293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0acd59f1c0697773c2de95802e404e9910e71039d0f6040739c1fb4a3aab76e. 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/USANG2216563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae04133c0a33c37d65855609eb7243aa934d60f6353fc152999295ff634ffce. 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/DEQ022280160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5924b7613314feec4751d28a46fb46898fc3687dd5689dcb3713f278e92f8b. 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/US3DF2200567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c9ffe9bd8f07b91a98eee0e45259860eecf20fd973bdc25b28902c312792b. 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/QM3DF2177813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c5319cdd2402ad6dbe1c585082ead55092e56cc52ef36e7be37b2c38f18302. 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/QM3DF2139418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb411053fd4f581f970e595195d7f56dd3a6b99799c9767222b1571f3116849. 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/QM3DF2139419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470b742d50873e52a34d9a4ea09279468e294f7977604a4814484f3e297e369f. 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/QM3DF2133905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7163ccfdb8c8669ea6e9ee804a6cd43e7417b7e1d254d28a040c52bec567c8. 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/USANG2188657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99f7ec56e78185dbcd8a0f74fe512525e55ae552839fd84713eaf7571306bf6. 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/US3DF2119092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f28465822fcf59b249291a2ca743fb254d6219275fdd44ae9a9946b5face0af. 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/ATUM42100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2b0fec2389955ea0a87a3685b81c50f2826893703b9487e20ca48ea33c3fe1. 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/SE6QE2076794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6df92b545fbf0651a8a481770748ee19c36dc611f3e3834ef415d672a4d730a. 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/ATUM42100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a90ce2f2679c93f15ba4b780c0528b31004ef158ec704c0ba2150832b29d46. 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/USANG2103261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f5c7cde3bacbdd3ea9b2faa7d3fe17090f9a1224f760e49c41123874911c2d. 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/US3DF2027920.