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 0xbff62c3bff76f807488f07015fdbd1bf415e0805d6d5aab303c681052ef50b99. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/121b3675-dccf-4ac3-a4b1-e0e05ce4ee49.json and https://artists.proofprofile.net/proofs/artist/121b3675-dccf-4ac3-a4b1-e0e05ce4ee49.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 0x39f09c48a7bf8bbe50e873d970943ced322dbdcc99f5835086c8136b5dcc9542. 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/USHM82421186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ff02e9a1454a289c1b304e323c6002135933641436da3f1fa14f47c6b29448. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM82421188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02164ba3233fc3448dbf1acb618a15e8600c66815d58572a7e05c0e842f48eb. 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/USHM82421189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8df8f9c3f45789010cc28151443926882f599ae608f755c97032a83ac27deb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM82421191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ac9e6692f3afb124dcde386b29d25a6890612a5602f11b3092ee6fc9da5acf. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USHM82421185.
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 0x40270f78c66553cbaee33680377345c029ca5257cea26badcf7547117b86c72d. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USHM82421187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003606df2b86f6be74342273bc2cd76efc0d60d468b93b7df344451d8ec6d64e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USHM82421190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf2f10df98e23a82e13df55bccf871aa2e92166681fbbf09ddd95cb73f99179. 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/SE2FY2000503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd94ae6dda853916c5544a809c51ab29291027c87a08d5bae4ed64a8ac036f8. 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/SE2FY2000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55af27741ebf186915f09ec74443f7d90201c43a0545ee95ce0c3d4e69b4345b. 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/SE2FY2000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80b6a074ff482ba7dd19c7260a55d7b8006921154494211996b21cc5287d10e. 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/SE2FY2000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12448f31863290e22ecde6ee9dd24c4c1ad11be514f72d6137577f8c85368133. 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/SE2FY2000506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9023b37f5ecb3befc4fba0885a0054b50c779c1a518504c65dc15919e9ffab39. 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/SE2FY2000507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b46777319bb570c8c59229d6db480b49efa4cda5f98e6facd127e72b176b0e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SE2FY2000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d37b85f7944b4122922d6ddfd768d569e044ded0f85f8113f413cfc83f934e. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/SE2FY2000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a6fffafb4e3556dc509ee8ce201574b354c14284f97225ad30a3ab15b5a3f8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE2FY2000505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e66cb2d818018ec6b598ba82b0827e349acde7d2d9d5db532c765056b504d3a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE2FY2000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70374ce6a92bbe688faac2f0e86d381b22cf3c0f4f0fdabae80d79243e065393. 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/SE2FY2000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f79279045cd3e055c3e22201de9d5f70e2f6a11023607e1437de9dd4b10d7ed. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE2FY2000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3427fe0a04cfccb75092aa26e784d94e8335818bdea3c8a659708f297527d54c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE2FY2000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53caa3f16cfce07b859cbb3910af6d784eb915ce580bc42f1aed1998af1f37c4. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/SE2FY2000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28cc950d56b32c435a60ad0ce286640e4b8f2a3abea0d43d98470b663e6384d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/SE2FY2000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bb2d3d706cb6a8fdaf22ed7f931f174d574b551d2d78f04320897529370e9b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6EW1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8aa589650b4aa5a8230752b052f4739ffbb5358dcf2682fe9b582a6cc7a5cc. 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/SE6EW1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664ba12ca14a4552e019106638de046a8b2682d3d69f245f1535b0f006789855. 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/SE6EW1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8658497633d374954019879ffa519473c7fb52c5ce6932eb7b94554fbbf243a1. 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/SE6EW1900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30055cb15237fedb3238c4620d9e161a5ac089d97a01fdbd26a83a6ce92e4116. 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/SE6EW1900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324cad90c614b33b05c45a7f1dcf47bb5314013249a3fb894ff5bb24b45754df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6EW1900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ae4469dcb549eb6f1d80722d2812e760ef6aeb52a25a4b520bc5c42d3517d3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SE6EW1900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af7fde7d96604eb1ef564f06f32c51e3d78661ae3af3e5628ec88ee5b1dedfb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE6EW1900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d7601a6da6327de4b936d010f1d046ae94bfc70dcf82a6df62286589e8596e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SE6EW1900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ab29e1022f65750530edd0b3f11732d3957091b67191cf2ac5a6b914a7a4f8. 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/SELNA1700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b043319faf2b16e38a63e1d5d622731c3dfc74d8114ca211dbce035762c114. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SELNA1700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a4380d132a8aa54018e76f973ce766df4d78e14dd9c983e82e77e435819b9d. 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/SELNA1700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272d99327d7463fd60a45f93933fb9b3be9a13b50de40e2d93febe444a4012cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SELNA1700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df394af2e9d9789bf071b5da828f5ad48e4de48fe26b3de16da17b7318e8cac. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/SELNA1700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf167cbe7876cd63c8ef1eb3349f6a8eeb0477e0e3b7986111745357c323a4ebe. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/SELNA1700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0253c801d8a552d67d1982b7eb83dc60bd4cea4dc6bff16cfd54a080be41b0b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SELNA1700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952105c46e771c12b0753f8ce2cd208f3ede65f27296fc53b29efdf393b1916e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SELNA1700208.