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 0x0578291ad60dc47f19b93bb867ea367f9ac001743bfe3adca540c8996cc7a629. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47d1ed0a-bc2c-4b6d-a5e6-ab607f8fdbca.json and https://artists.proofprofile.net/proofs/artist/47d1ed0a-bc2c-4b6d-a5e6-ab607f8fdbca.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 0x1cf719c4443e700ce0443c9359f2b8820dd96a13fdbdbfe6acf501b12ed70aa2. 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/UKXN22331744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dd8c2a7828fb96a652821c3f12a657af75e780b9d190fa4639fda18186df43. 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/UKXN22331745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf1ef929416e39672c8650b02b3242061d79684c30125cbc37f3ca597f41572. 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/UKXN22331746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44addf557104b8cfd507fb81c1405d6f7655302c70f7133de9aec99e47691c26. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/UKXN22331747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde94856773c5e0958e82d12cc37ff5d97e863dcef63f2849346d3b4548fa12bb. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/UKXN22331748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704578e6d66e04669216ca2c33121d20c04059a2438c2b1e986b2aa16b9d4554. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/UKXN22331749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7016061a919cf28480b766357aeda6bbf059bd51a3b95ce79cb465d389e473. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/UKXN22331750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27808f4e2a3ab82fa693b4e984c6fc7f9dafa2d970a7ef70ccdc006d309cb77c. 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/UKXN22331751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a76c20f322e5e7f3e2c65e8ea8bf75db7062dd5f8a0a6a5ab52b99baf240bea. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/UKXN22331752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f611f0ae2b5c7e8f68086157d265437d48e3f06dae4baed7d41b6c928c658f5. 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/UKXN22331753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718d73f69bdb18d4523a3d64ab8ccdd52b6b355a8bfe426372de32933881a74c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBMA22475412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8651ba2fcf8d32d1bcbc2ff082253326c3e533c58635e22c8baa9b5946437899. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/GBMA22475413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fb776e2d5c7b81fffaab63ff247f34ae35a68029ec4b9e8312aa92fbc24899. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBMA22475414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a62fdc9fc349f1fcf7e648f08a0e6eaf9f233f241508605893e666f076bccc3. 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/GBMA22475415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfe88ce87ba5c91a74a70e6cb5f13b0aa20eab9719bb7c14d9974d637e57e9d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBMA22475416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bc9d1e9b194f5d5483c65193714a3006f7db37e48a2d518a53c36184af784d. 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/GBMA22475417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d56ef9e77ecf1920630eca98c512f9031c503725b13a58d4aa13a37ab4ff2. 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/GBMA22475418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff853cef3dbbc1abf06028088237b1b6be3e048785241ac7c5715570d7a883c9. 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/GBMA22475419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f2182a2b9d35b47d0725535f3571fdfd86bb2e98ca835b55b8a80d9cd6a8ce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBMA22475420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef27e038f2a1881212e5b3ba52f37dc8f297d3d19cb6fcfcb79fcacbedce391. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/GBMA22475421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0501e37822d75c5b6e9decafe8effd29c63de08f2aeaab0e7c802a419371232c. 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/GBMA22475291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaae50ca6e26a677e9998dcc01ae6384151ee3b61c66c3d901a00709d33123fc. 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/GBMA22475292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893d4e5c8ee4ea552587a17f8e970714801c7bca2bc0f5bdc0e0bcfd4300054b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBMA22475293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b909284dda5b63e37b336f56ff0ae90128ed81265a97dafccd184145be8f3e7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBMA22475294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c495884cc61254c958b31b3017772dc2fd3d00e2155bae97120bc4b8ccf4a2f. 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/GBMA22475295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b1195b082ccf02c69ac2ecc75062dc21344c7957f489a82d3c8a1064c16581. 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/GBMA22475296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf7004655762a3444af9f22c9369af03cbb3a11f19067b6bb6bb00c7976fb26. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBMA22475297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f051f4704e0d6e91f4cbb5eb7ee6ce34886f646508b2d635d38c66781995cd. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBMA22475298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4719b0a74ca076e12a7f26df17d4ea62103236a94fc7d30f1b1aa58fb48a56d8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBMA22475299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2b93fa9ab068fd715eae9a6c97a65d1e2eb5ffe24c60d5829ff6eba180b795. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBMA22475300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ddfebb65399b6b586e1be6e0f88ca1471f82165e4187579fbf335f5b7abf3c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBMA22475303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12c6fc6c04f8998d4bdb833f27065b562351df7169befcc8750ac0f19bdb0a2. 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/GBMA22475304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ad83c1ee581adee59b94bb5546de39bf29ac2c7d0753305ec423c38d68ed1d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBMA22475305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4607af65c9344c15fca11bd965936167644781b93498e78b69f6a87a64dcd928. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBMA22475306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758d10566538740ef27bf2300ca952785e50172842fa0574b0f49b432a6c1805. 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/GBMA22475307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8598532e3daefab76a2f67db2507c2e2189737bf4aa31de2b969509bc45d2ab. 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/GBMA22475308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3096a4c4e6d1ed7f7320790758e4713c8eefb2b21605cc45c2404f7fa04fd9ed. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBMA22475309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fd6325ee21fbe39195afb584dd5cae15e3fd3ed392d029d3351198535b981c. 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/GBMA22475310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba521f29e92f1c0001f390b606bfe8d560f972a3ff8c421a0a9f07154891b0cd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GBMA22475311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cfdc0bffb7b798806e51c9ef205d70b8c11292d5496d02e65e136c2b1e6c0d. 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/GBMA22475312.