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 0x54e719617093d944d4e9ff5bb634eadcbdaa38384515fefe8bf6ffd42f3675cc. 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/e8e7b2f4-efea-48fd-9663-aaa1a567a86e.json and https://artists.proofprofile.net/proofs/artist/e8e7b2f4-efea-48fd-9663-aaa1a567a86e.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 0x43d4acc561a5ff29d34b83a0c2e81807686ed4f58f88c258bdf01add55243f7f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/HUA612000873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533dd4a89d04044b6710471fb4a214c741a57752345449341a4d2aeb8a414f33. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/HUA612000857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec297f0257fd2eba973de4ce64b4e8122b275adc1b1daf6b94c9fcd0926eff7. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/HUA612000862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40782dd98fc00adac9e867edc492c295b390134e69e921ca1243497816949cbe. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/HUA612000889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a735dc378c28986ff737e09437d30c2fc09c67ce5dcb5543ebc7f27c2fa4494. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HUA612000894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8b2d195272886272faeb101d604255a00ca2b70bb8750517981e6ee83501fa. 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/HUA612000896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d736059a1fe5f1da569c920b46923a753594347578d08e06200aa5a5f56414b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/HUA612000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4face797e7523d470e0dc1bcb22d751fc3508a5a1d3acd8cf182cd0f157e652e. 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/TCADZ1802041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75d60c28a7ba8364fed299cc8e1a26474b161b3422f2dc87656ecf485609448. 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/TCADZ1802045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab09689e587653134cc2f24e0cc9d963805590ffacbb04dd857753bddad237e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCADZ1802046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b7d6c30ee09cf7fdf6ce7e2d514eadfcd8410bd6f8b4d7d3f80bd728db298b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCADZ1802048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe63d4f056f8936a1cd1d900e0548364db11bf60c77fb4bb63eeae0a43210a8. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCADZ1802057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1024a952c8266d020bf572e222257a06dd6ed9e886f789e0d7922b6959b526ba. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCADZ1802058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8ab9879bd7ca0d7d54ff283afceccf157a91a2ea62fefe5377cec84e0dc677. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCADZ1819445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ff14d106371a512a9d3cd2e1dc08ec78a9b9ee897cf839a2895bc43b798d72. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCADZ1819442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8c9f96fc30f33d6b6c9aad99a6b367ba4baa15d58754f4afb72d61ec10febc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCADZ1819448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9231920db3ec9312ff0ff41eea570bb84e307840d44566ef55e07bd269ac409d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCADZ1819449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43204ff2739df598c232a209dd9c6004ea00e81edf0432a7e77889422f8c5f66. 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/TCADR1872562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b3ae74a19a73d6dd04673d0c6deff1cc2e01931e39d22d55f47fceaaf931e7. 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/TCADR1802408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63e2b93928f93c42e025600f81d7231ac3ff8a6c651a33d7c0d59c68878167e. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAEA1851717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaea6d647f628df88181dad5500f9b7aefd238e0734c88fbb4edeaedb6351e95. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HUA611900935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2e26bc3ede17611bfd4278d13109da08c5462e2455bddec35eb5ea6120e0fa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HUA611902529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb55047b089349f291f9eb72f8dfe7897c53ca81025aeba8667d8d31952a595f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/HUA612000679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf2b6d219056d094d06a0485ff9753e730465c4579131791c2e2a3cf3abc8bf. 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/HUA612022493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8f361221284d33db0c84ca7bcc475f5b1945135643efe36871e11036d00d07. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/HUA612022945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecf0d236f759d61b833432bcc7c8bedea19c8f3c27e2659c4d877d086263037. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/HUA612102666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153fff5bb3f918a583843e05f5c55b5f7870db883be6d41a2663c966ea8be3b4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/HUA612200599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7e7457b7c729195b01d7c2e5e7f13bb8122a2f4e0e0065343f287c15c75d79. 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/HUA612201310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacc59119abf1455bfd97dda123213a863020d8ea1f37aef85e0d5972d5212c9. 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/HUA612203148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e618b6607d2a484c3f053f72288289ba8787cca8ef50d43b9243cb82addc1b9. 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/HUA612300796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dae78778fc469f5f29d69f0aef65ac23f27bf16f93bfbe2f2d796fcb4c0086. 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/HUA612301363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb8a313133d40b1327b32a8d45d70d39bb1c4d666a38e40b894dfee3d73f15a. 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/HUA612301941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ad9b1829e0e1bdb46f9e9918fd50316c5854caad47194a08f9ffacd2572398. 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/HUA612302249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa658a912bfe83155f0c06bc6f6c4f3a03d66947827cd9239dfe560bb3e7c236. 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/HUA612400363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23927dd905172e86919b4996a6358241365197c527c1b8aef7b17daf55577bcd. 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/HUA612400859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f558652620845a282bd841fbd0505ebd4449bcaf190391c37d792d4694e3762. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/HUA612401297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b97726cf5448dacf0449d3c0d4d10ff09b210c4544961e59774e7f6cb40273f. 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/HUA612401618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322827d565eb13eeebd8512b492b3d46fd4bcd7e89cacd20d7b7fc70886667d5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/HUA612401619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285d44d74752e268189a7390f3034272acd7ac2131d7587acd9a787ab1d7c0c9. 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/HUA612401622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b20095dbf862201894cfe66f9ee21314fc35891af4b024539874e9e91103047. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/HUA612401624.