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 0x584f4ca9b1de7c9d30d61632ded5173eed54b5b5e31f235c501536f40b76283e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df3cea8d-e74c-4aff-a4e8-183486e2250b.json and https://artists.proofprofile.net/proofs/artist/df3cea8d-e74c-4aff-a4e8-183486e2250b.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 0xa1d40342742e6f1ceaf241f218948c9a54a00fe5cd88e134a4c997ee44fd1a38. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7V2479894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeb13d93303cdc85c1d9316a17773bf4771326e3d62c86b26b3b020ac236622. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZZ7V2479895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a39b4a60bc23dbce1bf153bfd39ccdd00577b5612b31365ff3c19e09180d8b4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:33:13Z), 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/QZZ7V2479897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa7a023f6aeac0ad69ee85ebf3274d9b674587fcca44c77b056ed7355d75a1. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:22:08Z), 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/QZZ7V2480086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154a3ab5ee7f6647856d8ab2bd9d5221f1cc8a1ee6b4f4f9f1a48cf10a412cdf. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:39Z), 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/QZZ7V2480087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903c3a70cc0f47311f3b7d4bc882b696a615b64806c7d9eb17075e3f9d4b0399. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADY1856797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e046d83bb4aee361384fb74c4697d960688cc672146c32f21d4fe38360b9b23. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:19:30Z), 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/TCADY1856800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ef613303a444504bf2baac51cbf0c02d5b28bf8ea3da5b5d0690e0cd56eaf3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCADY1856803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8199d861ff0e8cc46ff31df880f5e945de7fbf29d85248eeedf6c4585b9d1a66. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCADY1856806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab8e74a0c7fe151b85fca4e9a40b8657c28552923a80839a00ed2951101aad5. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCADY1856808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fa81a8b4d8159af07b4bd8ed7b2e4628ad117e88e2e6f5ff1584bd37422892. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:06:19Z), 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/TCAFX2113037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6be599886d2d65201aecefc5804625054533c36d2f417e3aa0dc0c7b9b3a2ea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFX2113050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ad3bbad1e0f0417fb9b6a3cf411fd3959e8f0427a49cf14b63bbf4362fd853. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USCGJ2386518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56391b392fc30eb541821f0c49af925a352a4932222ebd221c9a0acf0c051aa. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USCGJ2386519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcf364d9ed94775e79750dbd6dfabb1206dff199915fc1d40c46471a0542223. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USCGJ2386520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dd08f3b93d0d6b55d64f541d3863d042218cf3e4f847eec7308c0c801a89f7. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFZ42568969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5da093f9b2ccd79af9ec9250227d3075061f7148e08582b3501fd20c8ce7c4c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFZ42568970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d84e4b726cc73fefe387b5db1051c11769567d81542cad9df27c9ebc9da0bd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ42568971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb543ce878eda314607e3dbe16aa8cce39d2c3e18e66d4810003e6a5e3cbbf517. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ42568972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436c6514fdaf3f61b07e65a70f5aa6c6917f118147de391fd5c6413246f00c12. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:02:48Z), 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/QZFZ42568973.