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 0x40d70fc536ed2601ba407e3b0314f8b9ada3dbab943f5f18876b6c3d2f55acae. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9da9a9d3-dec4-4587-8f62-18e92c31ac5c.json and https://artists.proofprofile.net/proofs/artist/9da9a9d3-dec4-4587-8f62-18e92c31ac5c.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 0x675e66089f464a7a058d88580e9cc759cf1c8f093d179f1816c7d99932cc720f. 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/ES71G2324509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5a7696037ee1a3a529829af82e02ac162fbb4cbbba7be4723303299ed41ef9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:38:05Z), 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/ES71G1740106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc6441e168525eb44738480adf20279538e5b8594ab88d61d8c65bff755533f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/ES71G1740109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6490d25efeb1b94d30eb6bae511ee0f1de6145d15a004dc5fcfe980b4d6e2633. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/ES71G1740111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e88c9176e79428079f9d39d9214fffa25c877396b8f9d14100e40013b1c1aa9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:27:18Z), 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/ES71G1739397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6045bc9cd3dfdc3cadd56ae9d863fac77b8b934ccac18029f75d7c70f56c40a. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/ES71G1739398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1832a8dae907166d9b355f8feed6bd7da3221b6e5d90262a96276a2bedf61a6d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES71G1739406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde79d947c9a98dacfb081ee8c772a247de48308ed562014b6ac2cb8164852a1f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G1739411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5a7696037ee1a3a529829af82e02ac162fbb4cbbba7be4723303299ed41ef9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ES71G1740106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4750a03f34dc15e230136eae6a377127715ca7b13f888d5032b6e2933ba47fac. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/ES71G1740107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8be91b69cb9c5aaf21ee10d420a8201ae1746f3a1e538ead57678af45e8d29. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:22:31Z), 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/ES71G1740108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d71bdf2292caf49a11eadfc0d79e52dfba09f1aafd11a7f10b93f36d0868fcf. 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/ES71G1740110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e26a3932ca17cac7afea4e6e62f047cb46da7728abbd3dff36b16bc4cf70e54. 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/ES71G1740112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0f84fe6d92ad1a0409e7505253f0e89758cf58808025398400077aa947ddd6. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ES71G1740113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7427659a335ca9a93592aaa819de983d270f9be805ec1d48be1fe2497065670f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES71G1740114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b7c54542c58310aee591f39cf408711922ee185a4b460564881266f785d782. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:50:58Z), 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/ES71G1740115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cfe3a5e370271cc6eb49bdcd52d99ec400900d30ef9bd9988d4984f8b27c59. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES71G1740116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdcaef1f5fdd837ac59b7f6c28a20308afa36a6095c60791616545b27c9f4f7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:04Z), 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/ES71G1740117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23834036e26082bbaeecc0df56fc8559d1384dd4515404984ab502a31e424040. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G1740118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749abbda9e9529bc86d04e0504ce1f84e7ca61bccfff11a64437e20cc450e7f9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES71G1740119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb2159ef8f84060c0f88965b25ce165c8e49310c79f3bcf00e7528b95da6e73. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:28Z), 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/ES71G1740120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c9077b57791cf59b3b70db7057b6b29cb23200f26e7642b2f80e60cc65b918. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ES71G1739614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fd1d37363d244e2d6f53594a60d333b8f33838f97a77b1aeb7b168486a3bdd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:25Z), 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/ES71G1739621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b2faf451fa88c8b805116095e499a7f63acf17a2151ebd4bce1108bc4abd6a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES71G1739626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67712660713850070d3cf6f6805bad9e6ed33565ef03da6d101612b23b7e40f1. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ES71G1739627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe432c357e4b318759049e21731e5938a7d468ff79ff7ade737dedcb67278e25b. 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/ES71G1739629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74712deaf13cf35a3ba34dde89b62433cf557b9ef2a70f92f671cbb52b4dfb33. 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/ES71G1739630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0179b9d65f3dfc1012b064a713ba42eefbe5298a579b069eef2f277840771f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES71G1739338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ac10c4bdd9b37d99bb8c34d52759d928e5c7070231fce51666180cab9570f2. 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/ES71G1739340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc1bcbc6db1c7659caf7fc22b5710e25df8abec987c5842446bef5371892e9. 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/ES71G1739351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320a5192ca8f8dd87ed90a5232e7dd5de0e8adf3873a32a026ae15459a822001. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:29:07Z), 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/ES71G1739293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ead3a661220dae29457bd5bec18fa25052a6fde5d84dd7e357473fa1eda2922. 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/ES71G1739294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb805fd1f29d08f645040f6fd906329c6cc7ff395f9a5ee97a6caf08dbb5c39b4. 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/ES71G1739296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7e443f89a88cad7720f2f181280bfc1e510496794a92642065e2b19bb205a1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:39Z), 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/ES71G1739300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37001f458efeacec3114a8635e9c8510a52bd6d38c22210fd331c9197601d123. 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/ES71G1739302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a3148af6dadbb39510031b27ed25bd881d5a886b3dcd020230e1f0a5c49845. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G1739303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc373823a85eff3cf652623c05ccc8d2b99479b55dca741f8600b9e80f6698226. 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/ES71G1739305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d5252c6f23c6ba96e25ef5134dee25d39698f240d00f300cf09a526e0044f9. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ES71G2142501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2db3f8f25f5ea914bc14fe2fca96eb1c138dcdc1c324b17e0276d7940023e44. 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/ES71G2431678.