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 0x4a0ebca63c35461dfc67b485b4849665926371e8c77d57ef3ce79cb539d46f11. 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/f04e1c7c-d917-4a53-8503-0986e1211448.json and https://artists.proofprofile.net/proofs/artist/f04e1c7c-d917-4a53-8503-0986e1211448.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 0x9e5706943d844ec136c3560ffd3f31338d9940ab4d9f727d0a039e9329254e6c. 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/QZK6M2200483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dcfe1b0da979cbe15457cd5129e260ff43f6a5208352ce6800f484d6e7c209. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:02:25Z), 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/QZTB72211032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607e78a9c72529bdc82e90e03d5f2162fd5163fc3f95146f891732481386ac53. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:21Z), 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/QZTB72211033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f27fd2bc7fc6c1aebbebfa7c145f1231c73b5045b2a0130dffdc048735f4acb. 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/QZTB72211034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1bdbd2e4ce432b0809febfd08d332e3aff5bee515045de815e6099eedc3bc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:27:25Z), 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/QZTB72211035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c685c4f57d5522ab2e34ba14e3bebb0c29acda5798734fa5f8dbf73aa8cdd9c. 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/QZTB72211036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe7705e15952a3ba8cf7a2d657fe646d4dc5f6964722458e3e6087b78701f9e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZTB72211041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f6f994e426ac0a187d1f0c60da6e0eb2e59eeeb78251320eec3e745660dc00. 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/QZTB72211042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf294749f93c8c3ead51525e7aeffae718382442e764bf704cac20c34aa714d80. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:00:44Z), 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/QZDA52325298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf148f51d3944741ee2a1045da6f74afb0f32c1f58d0dd67000bd4f2417ed693e. 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/HUA612302473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca1cd5e16990741e26b940ed383443f74a6bfc15f2d860b543993c0373dd770. 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/HUA612302474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea194e9169988b632472338ef9d9224cd07bb03f8bf563d8ab6edec1d35a756. 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/HUA612302477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde763f5c3fd42bdbe10468331429a54c49141a659da48103424f369e0b073774. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/HUA612302479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80023d55316f437904239ed2c0ca5c396735882b8914c77fde180ffe511b24a2. 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/QZHNB2374321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce82ba4a31861bb6039ecb80b8db9e9904138e214eb883e58ad6aca71e484879. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:00Z), 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/HUA612302486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7279b3a7695bf608f0eee6a6da1c813807297876e71d9321cd677a585e821da. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/HUA612303285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec38fd2bc0918414a61a66039d1e01b375af5228ed0b9b00b90c1ce38921efd4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/HUA612303678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7238a98d716f79e10b20679d0353a0d3e42aa8366f52459e569d65a51e1b5402. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:18:55Z), 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/HUA612303680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98c96ec0b0ac4eb892122a8b38f26868bdf1c03d7e83758af811d91f3d00f13. 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/HUA612303682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4741d0a7e56beb358805558cff986286ef39bc1ff5f208fad3193d987dc86b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HUA612400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a69e88d28e21bb69be722a5c83bcd54e4c03ec6fe9a5e0476fa73d876e7c354. 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/HUA612400987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ebab467b3c3bfcca65ecb92356c8a641c66e1b487683adea2d3946aa6be902. 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/HUA612404996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ead714ddb16f6a116fcbb1626006cbbdd5f5b5796d24ad60486185f591bf0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:06Z), 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/HUA612405006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bda12544f80b05835aece6fdd845080dca5e411dc38e255c36d732e71b9bfe. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HUA612404997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c6462464eea13f2da9229d797c3f049559da49eeeb116a631bc6208dcee771. 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/HUA612404999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042eaefd9ad18125ce7216eb54db8b8c6c21ebb7453b01f5d49d5ff2cfe5477a. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/HUA612405010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30751544dca2ff37ae5e55306d320ce1f27c117609fec10f642961bb07e0d301. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HUA612405001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169f611cc920cd3374951eb04010c5e3a7974751c9e319da846efa61e599f74a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/HUA612405003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d99bc2aa2f5ea72f1023049c84cb1b5a5ec960d5064fa03dd2741676dab07. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:01:05Z), 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/HUA612405004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b6174bb7f52f389576bfb1c985f9d36b61a7bca6f09dd5c3ce2ba3ce8e79c3. 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/HUA612403838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1a9fada822406e2698427a9565f9343c136f4ac3eecedae40738549fd46f25. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:37:22Z), 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/HUA612405005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf481b50c633c20ff6ae783117678422eab34c56f3383319bd7c82eedb4687832. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLI367831230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf481b50c633c20ff6ae783117678422eab34c56f3383319bd7c82eedb4687832. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLI367831230.