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 0x7a12f5171c3a7b2355be16cdbf4e91e758669ef608a410e96d083be2f90dfe98. 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/fa0256f2-8176-4f01-95ea-82c2cf9d9626.json and https://artists.proofprofile.net/proofs/artist/fa0256f2-8176-4f01-95ea-82c2cf9d9626.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 0x25f2ab9b4a36f8e32787a988a9e18b24b36194eeee4256a010a184607d3947e9. 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/ING581900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cb3963201fc3947b24f9ce89e1dc802e39f85a219cd4336c2aa94adf1053ba. 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/ING581900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcd1f1d0b7adbc077ad0b6b44526dc2792f2c45b3ae840dae0107300962b67e. 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/ING581900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f1e019f2752c35fe6f7e2696799a1aca30e4aa1e1d0db982eef3362f007554. 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/ING581900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b6d0281b1c44913275506d4c7ba60c86b07302e9ec4fe181e7ca402a664811. 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/ING581900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecd98d875dac0612d1230e613b2c661aa3a6b01c3cba72819caf41a99245dd9. 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/ING581900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f9ba8863c4483bd67e1161e96de900167e69d0f04c470c4b1989861c568c32. 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/ING581900075.
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 0xe7b28c0f713b0345f32bdb973e2ca843622f49506d89030f26611b2df8b45044. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ING581900078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa030b7b42499aabcd4bae18a6650a754fe5ae78c512dd706da711b143229e4bc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ING581900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11fceeb27c609385d9d58ec9da7de87bbdadac20bbbe92e791db8f4eec47a30. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ING581900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4729df0e83199e5749e8baad315851cc2fd02621adff0f6747230153c6cda44. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ING581900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e1e1924faa8ea3e4fda0986672cc7f3df69bebad887cfe16bdf61a5368711d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ING581900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a4eb8e9702af7edcac8f155f00904053b8ac672617a023956970d3624deec3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ING581900092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4080bfa1315042ecb37ab2c873428cc0c494813809f59afa3f6672f9084c7c37. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ING581900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebda785dd82c0be4d62fd1cb7fa7083089a54adaecabea25647e91575c55cd7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ING581900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e87cf35394f0519573d385d5bbaa867dd122d068098de5f6ab6944585c4f34. 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/ING581900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8063a2adb3cd06a3b407c9fb857b05260ae63fe67eaa83f8dc95b2672bd1c269. 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/ING581900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80b83990ef2394d6b3c806b50647ca7b35f1da01e94d281948d182a38c0b0a5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:43:47Z), 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/ING581900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45187d8520390061b0086daf625307d36c773bf0058b1ab3298b04c2d0f69d72. 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/ING581900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0efa72df0813812ccf09301424ea970ed5e9a8f8d32aad4aa99fa9a58747959. 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/ING581900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9b258c0a0629df2932e83f5d25fcc445056a46563aa826c29868495c780a88. 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/ING581900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27310206fe352d13475c66a3762491e58376da000748a92d45cfe989c380cd8. 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/ING581900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec741cfe7e39e34074fc3dfbd975ecf717c00e351290bd180e2082854e390eb. 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/ING581900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a43dbf7b169f685252e5687c1cacfcbbae42cc66295243afb87b68bd95006f. 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/ING581900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d937f0bbd2ef76bdff563143607921e0a67f0c63eebf27fa72dc7cf25a65bc. 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/ING581900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe314a77800245a4a7bc08a1baa1018919bbda10a0d3b02f3b41ebbdb1f6c7115. 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/ING581900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3712dd4d94416b5507f7a7b05a3a297829c3d708e71efddf711f5b4d31dcd83c. 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/ING581900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffc461e3126998cc8f56fde6456e44bb7761ca062f9790e554b06dc45149b21. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ING581900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de0f9a72c04821b59f692dc8d9045ad80eec376696b74be5eef986e34dd7236. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ING581900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820b8d3541b2e6309019cd60a830c75312f3431489af581fbf0cec28055baa01. 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/ING581900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad760e5e140e8f8f35b9afaf3efdaea789a6091c55f6e79475258e79cb509a8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ING581900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c1c7d92909f86a1632bb3d4cd0bf58bf427d1b1d8e09b85a3de63e5c4f258a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ING581900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f78cd0fb75bbce30ca552b3132b7e745327d4064f1d1e9cbd7a5366f6f9e31. 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/ING581900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf2935c0df8444b6d76ef537ba69b880723dd9aac72d7d7f6bdab4190cb563c. 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/ING581900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc7dc3a04f5c2a5ab59f068f5e318908ade3a1eadbac736b8e91b3cb877528e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ING581900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d66de78a723ad08ef5297b76836f11b6cb41a3c3f5e80bb43e83cfc0f425a3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ING581900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd24943be9987bf753bcb6d345f93ae4473da95e26eec68324de8db07f127764. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ING581900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cf8a55f7c92133081d01ee31d95c92c96b4f2095288ee89f7819aa6cd54bb1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ING581900074.