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 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 0x5b12565d3e02cdb9d30c3b32afc0bbbf92084dd09b4796a293d8b4d1a7e968ac. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8d8052c-fb69-4153-98ea-0f54c1524810.json and https://artists.proofprofile.net/proofs/artist/a8d8052c-fb69-4153-98ea-0f54c1524810.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 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 0x60a5324fce59745d2d339f2648c970ea3f87e1010cd5ef2440962819c53374f9. 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/QM38F2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd3894ecc3e00cd98144222193b7c1332055db85dbbb02561302473eef2cffb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM38F2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab04903abcd1323dd6460b58f28c45165ccc0be650c6a6fac4521375ad0cb72. 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/QM38F2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd266d4191a323f9f644bed66dd59a43f7a490a1cad053596dcf7b35316bd55c5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM38F2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970688b55d0177c993feb8b7e8796dca2fcfae68dcd6d516d1c0218a05756302. 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/QM38F2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8f16e211ebb122047e483c0060d466f8ed0b3d4dbad7fea30ed9c7083a1976. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM38F2000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9324b907b4d5ae6032703811f5d24c16d2d2c966c68205ff67a4ed8741eab3a3. 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/QM38F2000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8349fc85285b917c983d659df87a79e698708df2759c63cda5dab45748465e. 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/QM24S1924402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0b6bcbb0ccd9ac24674ef3c0738927d00ee5dda33ffa98869b8018378d15e5. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QM24S1924403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045bb1eb5b9ec6ce97102cc4e8120b0d6b9884889bf36fbc248b566d5a685471. 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/QM24S1924406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d54b082d439cb68a377a48b76298755e63027e8e446768f6c5421a89f9a5a56. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM24S1924407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8749e27684bb0716e79d5b9883d56cc1c464f36a448eab84b9c2d3c2945e97. 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/QM24S1924111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19f6ca23ef6c6b4d686f4c068c6754183da00a236ee667888aec5a3b921f523. 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/QZ5FA1751961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a51811d384152db3cfa20454b7b4452669e080c26fa5ec21073d4e787d70f4. 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/QZ5FA1751918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1468180b1878fd19843906323d684659708864195dfb3a06e2e4de7558f2be. 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/QZ5FA1751963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5acf689dddfcf42eab89247e60bd11de778fed67b3fbf49478dddb42cf6843f. 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/QZ5FA1751964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf22560402e6327716daeb9b1aa92de570abf778286232bbc89bf2a462111b67. 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/QZ5FA1751967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2d3647bf33dd377fbd947d53df7fe50b73d9c50d4f9212d3548fca6118b28a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZ5FA1751590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1742b70a90651eb15712ee6083b745abe2aa99cafa1af008659c4350d82c382c. 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/QM24S1907751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c9a6cdae6c6d47de644afb09b90251a651b0b2939c6874b5234e8a624fc93d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM24S1817587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2122094d6528203daf54f56de4563854d489441bea8938d91ccad30c5da3c356. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM24S1817589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e48b0a3d5a61bba3647c3f8f20ae15f24efd988e45705d08dc84961ec4021b5. 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/QM24S1817593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c995ccc3fa220171616a45c0dc4008f631e7644728ed787445f1779322c826d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM24S2002712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d30e28be44fe16d375b31728dbab0623dcbc0d70fcec4152e7d21c399d6f1a. 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/QM24S2001407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48777980abcaec13ee2a49024f716ca05cdbcdcc6561b744c47a8d6be948c2fe. 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/QM24S2001424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2af280c26f924629e106802664facf4ee52cb0ef1fd8045f47d34401de142f. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QM24S2001145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703fc3c06229399407d316abff7cbc6c1b8c702508f0f019463daefb9da6c711. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZFZ41935549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6415d8b1d75c7b40a49bc0714e655b10b903b1751c630ca03403d84c789d0732. 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/QM24S1913774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8dd752cf0a4fc8e5a73276bcfaf68b873f6bc6abd6c32c9abd4201ec74e740. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM24S1911012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a51811d384152db3cfa20454b7b4452669e080c26fa5ec21073d4e787d70f4. 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/QZ5FA1751918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710dd5555d4373acb1ad9834807e21e7c85f40cfd60a1fd06ecfaffce03bb121. 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/QZFZ71938785.