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 0x26b33ae32b23ada113c08b8799c666b5245bdf09ec65da7566ade113f1fc5102. 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/285b161d-f0ed-4151-8ec0-76bbe9e952ae.json and https://artists.proofprofile.net/proofs/artist/285b161d-f0ed-4151-8ec0-76bbe9e952ae.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 0x98472e97b3f07fc50eb8b6adac6936535988dfecf74a5d4db43c2031c243de12. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZTB92325375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38000e29d388f76f0fbad02884be28f51f1376edceca882f5d05efdda17d829. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB92325376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdcfdcaffff992a954c78691113c6c57bbfa700c41dec719884f1144d232f7a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB92325377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15186a9b2e641740a390b7fdb55ce3e2ff0b2ec25ecabdbc62b91557dd21983. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZTB92325379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0de18849275ba3e4c8b7520896fb9784662cb064aa283018c171e9384ad6aad. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWU2422921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ce7a1053ba111d0bb2ac33d0b3e0665724c7b0276af2c3ce99dc073eedc04b. 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/QZTB72470578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a686a44bf4c2c1dd34677138c037b191a783d33da0c356e5c4d00f57a4b36. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWS2491898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0de18849275ba3e4c8b7520896fb9784662cb064aa283018c171e9384ad6aad. 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/QZNWU2422921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ce7a1053ba111d0bb2ac33d0b3e0665724c7b0276af2c3ce99dc073eedc04b. 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/QZTB72470578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66d21afcd520b91ee8cb6527efd0ee149d0cf393c5cab0d8efdd4128ae617f2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB92419849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6da7f5445ab23180b0a4bdc5cdadd1edd5b8c80ee9174508d1782f69e180879. 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/QZNWS2493761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879beddb057c1cfabfec26f95e9098539007d8b749f8405c406eb666dd0f03a7. 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/QZTB92419853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd81be0a2117eb0b013081dcf5db498c4413eb66bb322404ffed07af72b173c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZTB92419854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd4ee58ecf5f2e042f6a4358818e0386f682eef6e8813da08e72d4e0ed0f28f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFV2400864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769520565d80c4544d9447c1f67cf192387ba4d27920bf02f7c1450667c4d63a. 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/QM7282410072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc948c6da0a597357034ad86ce8de5953e5d89268a5ea2b1314af7c66e94910. 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/DEZC62594148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2156ad661b0599b99dc6602c198d867dc2aff1cbda602c5a95496dd966dc5d3b. 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/DEZC62594149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26550501f4894809cd9d09cd751d572ff26aabf364783b7975ff59898d2af10. 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/DEZC62594150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd254228970d221738ec85fafb9f745d6ae2c5c42b8b535170e41d000f4f9088f. 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/DEZC62594151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e603159e30a5c53016026347e43354a35defc59b45d61c5bef7d0a256974ca. 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/DEZC62594152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2510bed154b945c0ed850baffff655b3fa3231ec8931f2ef58e086133e1b351. 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/DEZC62594153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a722b11956f01981fb440d87f59ede06d16c1392e0988a3c7315df7e80dddf. 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/DEZC62594154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506422001afbb51329e25fc9fb5ce12827943bad28444c69a912323854ca60fc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEZC62594155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e43a73b761a13ac96bac4d245648817d1a72e33674838f274d28b82de98dc0. 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/DEZC62594156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c56b6bf67a667690e1deec18d9a6db56be342b5bc93cc2020611560f25a866d. 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/DEZC62594157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb6204e17474a027cc6b94d6a4c55a6580fdb38817db283eb9af6420144a293. 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/QZMER2123572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5ebcf08c7878cc47ebefe878ff2e17bdafd88d2f2b31562185ef8354aaf869. 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/QZMER2123574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cd9df53ffd51ca4bdee53138c279ca4ceca48e6bf2c749dc5157580ca30ba4. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZMER2123571.
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 0x9588c215c9cae349f7c8426b068d453e349ca0b1526200f2c085390ffc211fd0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZMER2123576.