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 0xa00c0be322f553471961def78602f5607f43a1f45fcc7a5924a9627089e1133f. 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/ace9c3f9-d9f1-45fe-989c-29c55216267f.json and https://artists.proofprofile.net/proofs/artist/ace9c3f9-d9f1-45fe-989c-29c55216267f.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 0x919f3ce7046ea18d4ac7cca506a0ebf3a639f7745c1c847e092a80a57f6a369f. 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/TCACP1697745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eff95413a51f31ae3ce788fcb9261f2c87716d5e10f95acb70bb813c5881db5. 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/USAT21705000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df372fb426385d9bed04765f7bfa6f21e988194574677b352e2ddfe339bf84b. 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/USAT21704999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb78a45d5839ee07ef40872430a97e654cfb29e32e4825cfca39df2eb2b108e7. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/USAT21802288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eebc05e647dece258a9f3a16217869175af3e70671a41b9c9a957660437943. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USAT21811579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443bad530441470fa8d22b0bcef87e4fe4dcdc8a9c5cb7e20b8d3c51acc945f2. 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/USAT21811577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1396b470e5d5a1677cd2400e45fb123fe555f6537aa980d28e367c6cbcad0a5. 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/USAT22002648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eae4f72a9e5f2e64756efdaedad89badc2b497bd63694f255ebb1c749fa9a97. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USAT22004922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda35680af7ba119528bc1eb4d89de7c34091ba4818d710936d774a284db0f0cc. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USAT22004924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df83883786081a1deebaf97e75a17b848f3e686787381645e5ff657b62aab78. 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/USAT22004925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d5e61feaa7d7fa18cf5b72506bdf2fff90594c7e673489133c7082cff47551. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USAT22004926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74a1e2663ce6de7dfadb57aed9eed4c5e129d1804413b5486a543a6ee91db87. 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/USAT22004927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8e8ba94542d16237fbec254a1ada5a4fe7c3d0a0e55ce4c1cf5e7ea2afdee7. 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/USAT22100956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3405c2f71a066f6eb73e36ba9a6c4638dc957dd3697b2e95a0d2531d9fad0774. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USUYG1595793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73efdf2c2cfc5612e7a289ae37fb2ffeaff69c2435ab975a37119dbb07ee693f. 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/USUYG1595765.
Finest Hour (feat. Abir) - Acoustic Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb923bd1c77e13d05a56f213a6941a757b2276b7e16c63d5f0e03dc27b9a666e6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USAT21811030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bf2090ab9d86d5d94b81a0d2b19d02a41d0173fe042391db0cee9971834192. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT21801456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2541771c14ae0527b25dc813e461475faf7c9bee0567937114b352c03ac542. 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/USAT21811121.
Finest Hour (feat. Abir) - Madison Mars Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871d89c86e09e96748e5e1319fb7daf2f749d24fb4e120242078f9d7e4b630bb. 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/USAT21802122.
Finest Hour (feat. Abir) - Zookëper Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c67f62bb1b8802895cea315130f933abee9b91220ed0bd5b7277fbabd99afd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT21802757.
Finest Hour (feat. Abir) - Michael Calfan Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614bd158ccf2d01ffa1474a7351adbeb56da6ded7a166abbedd31b652bb3ce53. 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/USAT21802759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7526148c847c0419b68ff6346dbc3419a97c6a9091f2d5396e244e77183d7db. 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/USAT21802755.
Finest Hour (feat. Abir) - Denis First & Reznikov Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7087cdd825c0bf7b9ca6ca7e4a527522969f56fa91334ffdc5f7f4c45748587a. 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/USAT21802758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bf2090ab9d86d5d94b81a0d2b19d02a41d0173fe042391db0cee9971834192. 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/USAT21801456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf9b59d9d371e72094c26bcd29aad3a65a3d410ef7d326e6961e01525fb49f9. 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/QZ8TY1700022.