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 0xb9368d300bbde41b7f429aa419964c4747261de0803fece1a8809da2ea63ccbc. 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/9860ac93-4319-48cb-aa40-10677d054477.json and https://artists.proofprofile.net/proofs/artist/9860ac93-4319-48cb-aa40-10677d054477.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 0x98f22cf98fbc255c8a8c6b718fe11941aa690993a1f639710027bbd41bd21df4. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ARG991005642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eca3ace0e5eae8476e9c5c1cf8f32df9f7faa81edf25b424b43d12878c077f1. 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/ARG991033443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d3654e48378e07d8185b994f910ceace728d9a98414a5c7343845603561580. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ARG991005638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2157834f1d6ff2b5657e2e8e70ac1c39eae34f9095e956533eba303ecc290f28. 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/ARG991035314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34067219668352d2fa9cea38fc597e112f857484be4b09a169e65c35adccd317. 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/ARG991035315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd793b273d3bd99e0c722bb66767332704a1891a56446440d6784ecb11d007942. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:49:49Z), 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/ARG991005646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0971cad6bd51eea1c53970fa84d68645d7802caf762b6fcab83eda42781279ed. 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/ARG991035322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128b76ec8cac9423186612247d575485def2cf40346032f0223d714ec5204599. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/ARG991005639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d021bf663b2227f1643b02be209839d353a66bb61c0babe174010804f35b79d. 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/ARG991027635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147e2476f4a6378c727c31ce81992145534212c7ca760b83ac52dd87661f4d2b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ARG991035333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf567924e92d1e54ceb0376565db7e6f4856ba4df522266447cfcdb1922be426b. 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/ARG991026241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184e8dd9aa9926aa847e96b94730ed6af26b4978138704c5f8cafb7e04bb9857. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/ARG991026246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d4b828c18c9054a983cdbc42da3729e31e80f6a04292ecc140646ce4686439. 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/ARG991035347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a136ffbd8ca8af57552a8d8eb132c16b3a7e052c6d71cef8d801fe08509260. 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/ARG991035348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd313a7f95916fb96b8269756c4f5598f2c18085211bbd5b4b37f69355c7e3f04. 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/ARG991035350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f22cf98fbc255c8a8c6b718fe11941aa690993a1f639710027bbd41bd21df4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ARG991005642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ca14fba5096bcebdfe43de91dc5b6be0d72933f6aadf37c1746d3c1c91bc87. 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/ARG991021899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9125c96ef3dc7c0b501e022fe09e2460ed40cadd35e74f2fef54bb1b4d75d3. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ARG991021901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a44ba1315b58fdcf852ee93b24d29b2fde0988d99c5e0a3acc96dd7a644d09. 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/ARG991021904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db84161c5ff910ee88d8f2ac136f238b37943bccc18859d272bc4e6a505ebe. 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/ARG991021905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef54b85057016f3949ebaba9555448399fc7d9fefdb3c724ad4acc3f1ab95b71. 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/ARG991021906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8e65a49e74beaee5387f156cf1dda503941da8e38323de0f5e14291974220a. 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/ARG991035352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29137f383c6719baf12098569fd6c65ed795fe78b31898eda240534c18d3fe6f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ARG991035354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4a32345e8b1813421b100f8b4b51a03cd568c0bec832e87f5739b1c816622f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:23Z), 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/ARG991035361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0566857d9e3aafd3e4dbb666da897a63e93e2d59ce38b60c660036c1a101ba89. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:14Z), 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/ARG991035372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267c8a1dd2299c6b805152db9ad5429a1d5153b610ba736a90f52f6e654bab1f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ARG991005644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0c6e347b737886e94fd99f363f9a1b675b164eb92868eb1b6611b19521900f. 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/ARG991005647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ec0ca0d3311efb5ffa62b7d09e3f63f2db8165c9609ec2d36e37a7511c7238. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ARG991005649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faeb0624e97da5b89484c445353509cb8e2ac823572da76e6d1e3703fa72569. 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/ARG991005650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91c42ff1362bc908ab9ec467221219812ffcf6ed6ca41afd93f39a439f468d4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ARG991005652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7b59e61c076622d4910d6bf2a2e74e3eaa26fe5da5e2f474730f4fde8a4c52. 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/ARG991005653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6044ae2ddcadca777609ab2cdc19673c993cca9b8cf6f7b76c92f0029c1684fe. 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/ARG991005656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542e5c91e3ae0214a443f3b74423f80adca8a8d1ec541d1293077793d2a27250. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ARG991035400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4d5cf334c5ef2767bed072c25ee257300cffcefe3474ce96a62fddaf2acd5c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ARG991035404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30e948bdff5b51a8eda225eee8695920fd6a5a86f2fd68dcf0fbfdea6274af8. 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/ARG991035406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0b5234fac6948e604cc9c8703b2a0ad89f5b8dfe035bb5954166e87dc9f374. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T09:01:43Z), 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/ARG991035407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d742ee14bfcee8bad20b6c1fe4a97a1359d17bb22b927e1e8ef4e881a68d219. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ARG991033748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef91970f2ee611514b9b4467ef442c71ba2f0524b085894ff7b361e584b1aa0. 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/ARG991044252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fedb7991d839551a0c624027968694503c76b347b0cc67ab4be73be7cc77ed9. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ARG991044253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5317cd976090ec42e0c130aa0029dd5829c3a96c20e9c99091c2e516af2d1e. 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/ARG991044224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64468ab10ad3417fb1fb40fd20da36df92b9dbc9bd680ec2fe87d881898d8db6. 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/ARG991044225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f38f9f62ab58becd1b0da855c05126109b2bf493ea7b72d19e01094fa5aaecc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARG991025405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c706f5572dc8a258f02aa1c53304a8d7218c8ccfe7d3b29aae0326834affc73. 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/ARG991015301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b092718d7c2addd43779cb2c5bc106433ebbb7d75c54e42777ee4034087eb07. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ARG991013725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3505477b3ab1736b9e4dc643c9ab61e94fdd43e93fdb25442258e0a38653b62a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ARG991017986.
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