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 0xb0ebeb731d13a4844e0b4f4719af97e78016baa1a06cbda38c5c0e73563716fc. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e0fb2a4-fc34-486a-be10-9e6e939632d1.json and https://artists.proofprofile.net/proofs/artist/6e0fb2a4-fc34-486a-be10-9e6e939632d1.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 0xb3aef0f39ac6a66b1d234a5f6382b7d85abd9e857774abb45ec66fe915c8a040. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/US83Z2457963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a49494f697ef3c2212f6c6d77c1b286a1d3481ca59ce3be2456e51cdab15d4f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:31Z), 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/DEH742434697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81838bf67a44735234221bcb6ea115505d49f85fb1bc8bd52b11f2783d4b0fc3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/US83Z2501580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57e81d45eafbca33e575d9019900b986282333a8953902a318dad4f36fd528d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:05:12Z), 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/US83Z2501581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d87a13c708abee92dc0fd67518d4dc24c9b04d1a72022e8e958a04004b187c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US83Z2501582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0f97d01cd4a6e0dbfd0b5798e36dca454987f675313d3a36be1ae721b60fb8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US83Z2505795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9fa507d43fd94a37bc9e1cc0daa09c48d1e9ef0faa080788c8af9d03ca405a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:15Z), 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/US83Z2505868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1261cef78ba5b99c50498c99f0133eb4347264ec74e664e89b72f9608fe669d. 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/DEH742513738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a845ad5b0a6e54c02c25ec85b787cd9d0c5036912240d503ac0a6495c7b2af. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/DEH742513739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7febe11d3778f3f44dbc0d0973a537b15263e592c03aab3f5e8f9959fda00f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEH742513741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa712a0e9beb074d6d60b9b28e91322140f2af3a2454b9fa2eb756c86d342ee9f. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/DEH742513742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bceba17e1849b8c6bbc29bf28f224919877db01664077b3161da38d5095368. 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/DEH742513743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb8f27ecb5a6068dcbe99e87b44e0a7abd30bb4dc93b3984abda96c7bb1fedd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEH742513744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc594f6233a0bf2bce11f4f6ce7cfb3cc34d1bbfd1558c8d9968885e9484ef14a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEH742513745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b41e2848ebfee8c89b1d737660d6dbc6463c54400cdaff8ad39a40108e6f9de. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEH742513746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48480799cfd456f186ed6f6611faa1dc80c6d17de82df92df0382e470cc8344d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEH742513747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d31063d96db5ed2cc897af9cb41600076188962d4800bc7f3d62a9342cb49a7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:51:50Z), 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/DEH742513748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb729ab04b69fcb791365ad8a479773d0e58c1669b597f8d4ff25548de34e80ca. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEH742513749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e55f857b6d8858652f23c5d9f57b1c0077a93a8d89e553717da9430cfce4d6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEH742513750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d9192d6b3d27ea44d9abe223e45d81d86968ec220d923fab456472feedc51a. 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/GBKQU2535672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aef22bef74f5f2fe3347656e6972b82aa070a957287a791ab45ddb8fc814c0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:50Z), 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/GBKQU2535673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4167596a7588b9af467087bf24299010f8d9c914be916be1f20ba6fff9245668. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMSL31950175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa5bddd3f7866c3a1673f6d17a204caed376a7cc17de7316b1f1e56894dc372. 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/QMSL31950176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c453534af9b5b8d02098fde8717789ce01bfb47c723121887ade9566bdcfd6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMSL31950177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabe510bef9d029b7e8d78eed4e07a39f3ac5e1aa37b82f158dc3bb83febf932. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US83Z2541589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77489f9e5c04cb20bc9a689a15c967a50c7f333ae78dc8d7b2b962788435118d. 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/GBKQU2581395.