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 0xdfba096bcbbbdab7d2637376ac5acaf8369e32da8b86562630e2913777433d9d. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c32560e-f3ce-4c55-a6dc-05d0d421b329.json and https://artists.proofprofile.net/proofs/artist/2c32560e-f3ce-4c55-a6dc-05d0d421b329.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 0x385421eacad2e2b6edc9960c3fdc83abc5e93e3890c96f8151f622c27b4a1565. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJG2571477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cd00abe061b879449fb96d1d8ea521c11084078dec361a1618b1aeeeb49114. 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/TCAJG2571478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c1d03de09c478a5159367c9c88720e52b7ba3f300bd27a34bbd49d2e077ba0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:25:39Z), 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/TCAJG2571481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271c5228cdcd7e03cffe6809482a8d907ece8484c0ea5eb866e7883fc748db14. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJG2571483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d789f448e57daa49ae15b49e7250f7f6f3b5224290a3ba60404927f02422c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJG2571486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071fd748f3b0b653ceea483db20a911946bc3f8b197dc485c7da99caadc9cc97. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJG2571487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b3e4999eae29bcca8166039996baf384b40b3ac44425626fadd2d575544b96. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/TCAJH2571488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc790bc199ccdfcbfaced50797ffab96ba9986f44f8bb2d36ff2897789309bae4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCAJG2571491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593135991251157982e87b26407f767c53e85ff25257f1acfcbc1af40aa6674b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAJH2571495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8635745245b7e3f89b4771e271a315f398e5666653cdae14ef0c45a6d3eb09e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAJG2571499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e70c97ca7347e74ccadd0eb5fc89ffc30808c658112f8ce50f8204b7235f642. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:18Z), 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/TCAJG2571502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec0b6cc854c3908320b8bf23aa92e0e224346ea05eeb12035c661603c775d64. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAJG2571504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203b4173d4f24539da38dc6f4340d77be2e193a47008223558e2cf7eaa0ab771. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJH2588245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8915da1dc207a67818366383a7239df86bfa6ff4250397cf90e8ad34bf9d22. 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/TCAJH2588249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954670fed52bc1b0c1c4bb78f1519b1d296b04d9aefd05a40e867ed2aca809c8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCAJH2588266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72d144faba266cf1d0966be7aaf74369679af7ece60cdb7632e5ed1d3736a81. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAJH2588272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47134610d01b26b096ad05861ba29d6b9a7203694dbc83554ef4c5a08fa73eb7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJH2588280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87017dacefbe0ac49b5e238a7dbf5da75936206c04bd47be761b7dafed4f76f9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJH2588286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa173a43eb5241f7d436d89abf77dd3eed75d377498c76915b260bafc459dba. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJH2588294.