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 0xffa96bb379953ac66091e742aa6de6a8e4a757dc86da105e4d3984e84f8ccaab. 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/2ada474e-0d17-4831-b2fd-12a2fe2d2a6f.json and https://artists.proofprofile.net/proofs/artist/2ada474e-0d17-4831-b2fd-12a2fe2d2a6f.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 0x9e84b897996bc58ef666ecedb48b8ae53c677a6a971dd1dd0cdff5d789e25306. 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/GBKQU1214436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c240a7c9d55c14098aa3e8513a279ecc5c9d869c67c680cf20114f24f651c86. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/GBLV61406224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4efdc55630c45214a9bbc88dddc01891dfae8b7234a6f4e6ed1035c67148bd. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GBLV61514705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1627b80f8fbe93842146e205ab9da0afaeb443dd14bc86e67f05053721436e1b. 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/GBKQU1618723.
Welcome To Vic Fontaine's - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfba28ba0705969d1a00662624e3daa0dbd7e7fcc0c83ca3eca6a65f9697a2e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBKQU1673302.
Welcome To Vic Fontaine's Heart Of Glass (Sax Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167561ba85a589363188700f5d1723ed952397b697520a76827de1066289e4be. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBKQU1793053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e17eeee3fa522ec9612ae2648f1660b926d03b678c78fa6bec9ca895815ade9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GBKQU2123727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd333076a507488e6d1b2498f8438c3094d2f7e5b7dc41f286058c663cf4c9d02. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/GBKQU2172682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4779941c712848b4e1da142b418db705ab4232fa1af4538360e91e09eaa58cc. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBLV62122649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd71d0e3c9e3634218325b720754b2d97a84ee5b886445b8adc2ee6081972d0. 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/GBLV62133439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2602e6c619229f3cd7fbb2136c29693490688b27fed8b11be64922955f704fe. 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/GBLV62201411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd71d0e3c9e3634218325b720754b2d97a84ee5b886445b8adc2ee6081972d0. 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/GBLV62133439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e26275d9debe3b3a1dd3c7c01022fe0bac557692499747ddf1fb2945518b288. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBKQU2473383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128b5d58b09c315c1d1c669557c313cfff98c0a2558249c6936ff454184bfc63. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBLV62418373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8037217d7a5e40cf09ad3e7964fe4da79ad5d02735668a5583132b29e2a5fa. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GBLV62419547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c1ae69918b5011db56f654e248abd928168632d511968712c5ba6c4bdf0f99. 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/GBKQU2500287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d4b27032cc96f9a2c8bf7964905a4ce9421380545f049ff36dfa4806af4343. 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/GBKQU2500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16147505d11fc8d83ebcf04e5845de98945d1671bb33747eaad4d34245c9090d. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBKQU2503211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36babbabbb9eb7fe568c84df46edd96d4a299e31a26766edc143e2ab0bc29e3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBKQU2520932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f7357dbbaf9f658f3a2723a2cd5b0b473e432540d16e489c166c06d0c41c92. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBKQU2504536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67df01ebe87e5dc83a7458ef97f93944f213d2e616338697676eea3f2f5e2745. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTRX2523597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541f7b949ea9f4221d94ab6ad78341ebd963e07af27571077cd74df4b81ce8a7. 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/GBKQU2516584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74080293f01ec2cd919c841ba3f64fc2a3b779c10fa644abc399f3237a5103f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBKQU2523195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9482c5d0d34e96062592c193f43529105cc2283f24470599c3a10cc1dd5f6f0. 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/US83Z2521653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a089e2639c2b004fbf70d8c7ad7b1a6be3a84500a4089ccfd696e1d40623111. 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/US83Z2523885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086eb8b624e5214b46308573c8111f46d0de5c2cb585109dcdf7aab492cb36bc. 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/GBKQU2535471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b8d2764e486f774553c36a7eb9cbcc78dbc5ae18b3f77f4370d64bc25bfaec. 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/GBKQU2535468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb97a6a75b48628aa97430cbc4a69059fae69bb1598aea8dcb525b45ae3e59fb. 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/GBKQU2543698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27ac8c30e8b826d033f9db36c44f1d1df2ec01c3f38b5847c99ef59ae32d2db. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBKQU2543701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15391d1c661ef7ed8989d389fe7ba20e96a9bad89b0efa46f2d90268c8d735a3. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/GBKQU2551226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472add88794acfd55e83bbca31a3f2e25f364b5be16b9fc9362770148767cb89. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBKQU2551242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf489e8b830d162ea74859ac207f57f147cb87b422feed7a8a70dcf4f789e4a79. 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/US83Z2536484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebfc427bc07664862019029a31650c339d28ba334f1afee1f4e2d5c2406c087. 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/GBKQU2574600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ac2c0870f77a6f9b3c5f84f39919f56f2935a8accf7118eea4602ed0b62447. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBKQU2574604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a5d7a5b482a8d095ceddc9da14ad4c599bd9af0d98e4da58dfd6dcca87059d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBKQU2580243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121fa7ed35b1b4bb0dd547a2e94a7ee820b39d3535f1b90ae3372610c526d48e. 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/GBKQU2589962.