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 0xf84820aa658d09540480b22e9edece2b44ade5f26a2d6dddbbe5d02485a93585. 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/d0e338e7-70e7-46b5-8b2b-bce0c58f5b72.json and https://artists.proofprofile.net/proofs/artist/d0e338e7-70e7-46b5-8b2b-bce0c58f5b72.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 0x147b337029c6c5556bffe51b28d44049f1bfb2db6074745c6cc3e25e44205e66. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:49:01Z), 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/BRKSP1000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c57273b7227703b7b78770722e1b1202956ed1f3c3e2d1e68eb806eadff7e3. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/BRKSP1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e48e5cfb7379b56ba83d7876fb1fd3d1ba574ed8c7b1ac4590da06d17e62e9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US7VG1330280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcec6010c43f5832ecd37b90c827a08b7f8f2974d751162033b5afc5ab1b7281. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:23:01Z), 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/BRKSP1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e2302d70ac16f0a0a297d2ac8375dc47a15debf5c333f561dd45749742b289. 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/US7VG1330282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f12211dd6eb02e29d2de1ded642affa38e5e10a1f4ddbc5ec30c9b7b944339. 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/US7VG1330283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426ec45c02007c0eb4c3315dc216db918611e3fd2f47d41e365194b5e6f1355a. 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/US7VG1330284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0222ba22bcf45ae09df05befa58cf233d6956534ef6fc57a9b17f36c1af30c86. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/US7VG1330285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56607467ed8222435fdb76a20bbfdae04fd1bf190db8cdd82e744882cefb4b7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/BXDPQ1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe1d40fe294f7c9fd209bb0fa1822d56e7fc4204f596dd77390b3bc6d209b9a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:44:42Z), 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/GBMA22052824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850332986c7b83cce4055efb3f7ba1ca93ab109090d460b3f174bd5eb4309f2d. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GBMA22066223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44750866b8bd4ac7f01fc97e337622f2eceb22d6fa11985cd4e3f70456e7894. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/GBMA22066231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27734088d895ad33b8b5f5ac916d10f30730c6d822ca2082908110d105bea54d. 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/GBMA22066234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23936b9b6bdcc766e2d80abd5286a4a128504b9df3e8d49cc9ef3099abbefda2. 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/GBMA22066265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d3d34bebf44200c5522244215d3fce85ca553d8f23b69f97b151ba4ff4d2fc. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/GBMA22066271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228a6172201134033d695b3b623af1afbed36f974ed58a34e586d117225f53d1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:06:50Z), 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/GBMA22089112.