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 0xcf0aeb2e23a2f0df5605cdd2aa2a95c00dc6fd6e6d2541b91b55ed9f6f8a9906. 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/a8ba3c5c-8993-4ed9-a6cc-eb13bfe19c80.json and https://artists.proofprofile.net/proofs/artist/a8ba3c5c-8993-4ed9-a6cc-eb13bfe19c80.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 0x7920a494453df630efe325d2dc6bcee0c60598dddd2dba78ecc46f610d22853b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZFZ62025309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762b3caaaeaef7cf39858271d5d333c38958b65d15b437f4fc316dfea2f85fce. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USYBL2100661.
Thief in the Night - salute Remix (Mixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dd6fac350d127452daab36b9324cacb131cdf8c23d8fe0338550c2a9d12c35. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZK6L2288831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b567463ce7b94082f52b0cda0195c44f055841455fd1404f4625bd895df2c2. 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/USYBL2201383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606501566c4453cabea624edca1bb757e22899285fe46dd31d987a11d7e28ea6. 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/GB8KE2302195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29733e729b9e6421b5d8e5db7a83dba9a8c780c4e44a29ed359ee6c29c41d9f3. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFZ72476872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac9fe354d3c056476cbb57c1450fa6ca6751c50fb42fc92b94201e9d89f8634. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZFZ72476873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cdd07bb9f371a88c8409e93eee5227e4bdd33d0aa5aa6c735ed893f8e9bcff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB22477034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc98ac05b7e1017cc6c136a431739d5dee69a6117316b49ed1ab3ca2d008cceb. 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/QZZ7T2435857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e6806d2abf7189aa588d6dbdc2fcbbe7dad0e9c83556f119bd2866da02200c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USUG12503536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f2969efe5babd254ff7b742cb68993a5447818b772a2398d5aefd0121569c9. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/USUG12503540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff7d585f278050874c3d4e50d0b8b0e44e91532783aa665025a4001be22fe2b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:15:44Z), 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/USUG12500994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee6027aef4ff043b8b0f9c442751c33aa08deab06abe382a39053372408b0e9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USUG12500996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4b74c00f2a6d4ae39958180d78de64b6b312d5ab8bd943b61b05a8af52f725. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:37:35Z), 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/USUG12501000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4abda81c9b0aa203b0dc06d9ba69423ff4f081d112894923deda9aef9b4adc. 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/QZTB62522121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2face84fc7fbd6aaed98a8257d2906b46b8ea7eb26301f29c194abe8f9aa311c. 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/CBEFB2501373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5945dc7dbc444efa2ad567f9fe2321afdc5bc105739e93257a8782f80e877cac. 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/UKQNV2000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971bf50ebb879a4bb8d1fc6516b1019f217c16a8312c401d1fb2bf31be21230f. 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/UKQNV2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2316d19a9c2921ed5606d96a881b0b0e7a5bb7c42444502f67e2761af35399. 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/QM42K2069751.