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 0xd9f20eb1b09f32b56da448cfd822af3c0bc467a14407eb395c45f95c947b59d3. 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/1f38c71b-63ce-4b49-8130-8e6fab8ad531.json and https://artists.proofprofile.net/proofs/artist/1f38c71b-63ce-4b49-8130-8e6fab8ad531.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 0xfd3f539a1ebb466c16200cf2f7bbe33952f720e566afd20e05d1bed50df4c619. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/SE6SA2309007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccac4e8fc31d2cd1a54a63af3fe4cd71f72bc73234bf334ccdc49168f1ebc91. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/SE6I32476790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd48ee36cad88babe45e3bc4957fa9e76de00a6c7a5914361609c3f4bb9ba8da. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE6A92382502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536c9028363c2de45f92675600402e706ca0ff2571acbf7eeca346371d29d18c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6XY2377194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42369d2dc1506ac947abd6792785d35dfbc7b6335665949aa41f4c78abeb9035. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SE6XX2351804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a8c61e96c6dd2c48833d5129b42d57e212def619d451409ccba7ff24f2543d. 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/CBEYJ2436820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2924d44d8aba7cc82069e74e1ee5feca5557e27d2c7e6ed7b0ab7b282eebbd42. 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/SE62M2335074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f41fe4f2d1d72be29bb1914643687fde2665e6f02351d6a5dd87839f0d3378. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/SE62M2394102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ee4fb99f84501695f26e155b8e2c496bc224745adf5a1f679160e37b0ccbab. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/SE6A92354476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e4daae392d21eb930ca42c77f785522e8993afc6731adccdbcb11098bd9dec. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE5BU2417720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f0f9935eb584f94eac8c3e72a9092e8fdd4bb755de1878cc8915ad6818fa00. 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/SE5BU2494891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01573518df9289036ced308c4ef826d480aaf5c5aab9790655cafa80a142610. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/SE6I32416002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb30bf42b1d86f11f5aae5d2797a722e6e008edbbf2af0a496a0c172539be6d5. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SE6QE2450539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fc0cbc168b0a00948efcaa52b7c89eb5e4c011673bc711470d1258664eacd0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SE5752425062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179e52a70af5c9ab5eb2ade3729d1038848a9ef449bf9b6e636ddf87c714ae2d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6XW2384296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827bd3efb2c8de0b44c525615cb88c42e633748edd093a97dec758b93e714916. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/SE6XY2389549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54ff9d9bcbc62d0e18211a6582bfc802323f77e0df807856b8f78120396134d. 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/SE6XY2365155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8327f9b4affce93e3001f97d166fc0c8135680d634aedd9846d756f844bba263. 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/SE6XY2370368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08742606aa0fd28ee587ae5544ec2da4b27ce5fe617fd00a9600fd064ed29ac. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/SE62M2345586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0448d5e3e028e73ff728e2885e68a09bfba244138996ddf4f4ea22c82164d01f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SE66N2374583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a6307d90a6944d0db32f5ca4b830a7114539c1ac1b845392a7fd6aee6de44d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE6XX2315307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38c1ac17d6e3af6186e9739b1fbdc0339ae747cb97a2753a0de556769e19880. 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/SE5BU2417718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b0ba3cc914c7b756d22e1672603379f54172c8dd828e9d1d2d6e36051c1e93. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/SE5BU2417721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4786ef20105a0080837af1eb3ed03c4ede8208092c3df582c3210f4f3bc9b3d2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SE5752424999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae983693b41231fd1e63777efaf9f6773a0cbdd288f101862b062df38efde3a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CBEYJ2442038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ed8f5fba63742c3aad7cded05fb2fa42353faa9421188104a1d73bbf78da1c. 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/SE6HN2415762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3221e88a1ccabd5bbb8414ce71cd481c2da7af6f190a485331dc5a3e3e5c1381. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/SE6QE2432437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca659adc3b395e514738f1aa0fd15b707edccbe7123c68a9b27684e755a0aa7. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/CBF8B2451450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda2f43eef0d3bbb3dd5dc2473d740b235fd40d3c3b662e65b9f5b3aa4e34f7a. 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/CBF8B2451435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97baf11eb84c9f9dc5cbc9cd45300a83c2a2c8486fb20a32dbdec116b8100a0e. 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/CBF8B2461952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae382121692faf26cc10282ba6a11e338a0de6dfef050625d12cacd21545b1e7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CBF8B2451380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef0bf11b6af646a1de042cd062fc304788bcf012446857943d64a1db26a1a6e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CBF8B2461982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaa677d6c7fac639c7fa8b7d40cbb9126c12cf8cff520ec79b15d2e4c0787b4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CAHQJ2511031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cc2ecd238aaa5ed7ed7a53f257b8dae9e6dc49239f436d1e75e0a5db2ce5a5. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/CAHQJ2511012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c93322d6298496c8181de922121f0e2ffd53d0e91e079fa359700462c4ed69. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CAHQJ2547930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057b2aa31fb9f9cd588debc15fb0ba789ca4b68db0dbf1557b96b662009c3fb8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CAHQJ2578888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cebff65281228d36dc50d488ac20f11c10e0fd7c931946a2cf1bb61b8f76f79. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/CACWV2588655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc8e338a78728b4a7da6bd8b1fe24abfd7d36dbbe9476c6dd5ae1b83c0048be. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CAENV2505702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923d2ee3be185544fdbef4a51b519f53b032a7456424caa3e3f262edefbd1920. 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/CAENV2545938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab84c2335e6f90832e75d5489b817b061230aff7e385826da59a4ccf3c06b0b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/CAENV2553183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced90538beb75c73d198d0689de3fac5e9de138c6271720a0725ff07c409d10f. 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/CAGOO2516496.