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 0x9072650bdbc77dac4fa35e9fb3e6e148194bd29f490ed9fc65792ea1b2dacec0. 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/a1ef0308-f73d-469e-b50c-de7555d0aaad.json and https://artists.proofprofile.net/proofs/artist/a1ef0308-f73d-469e-b50c-de7555d0aaad.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 0x314c346e35bba57928ebf5c2069d387d9bda0707dc2cab32854e559ff4384eda. 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/USHM80807946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b28fe87dd9a2644af23c1ce32cb45b4eb737db0570a345c1160fb08ea4cdb6. 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/USHM80807979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1b898842bef6e8dfe6e324265a4a94c1afc7ecd2af689d0ad2e28e297a3c08. 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/USCGH1020422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf633fd761740060250dd271936f01b7f671393bafced2d1ad43ba45a4e7b4ef2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USCGH1020423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f37fd42bba4aa417b7d6f816b16e0ac784cddea5f1018b1c358f6154dc6af75. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGH1020427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a466503ce857314c3f7e1303c5c30abb6cc0fac79a404feafef5510ec13ab5. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:16Z), 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/USCGH1020432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea05ebd7ae5b3480a5420bb6f16956a6f595c4ee7d037352804046061939a1b. 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/USCGH1020433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce578aec67cb5a1f9fee177a5cf1323f40d06489b722588722d5bff215e9c38d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGH1020435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa039412736c7049e7b9a9ae2aa13871095c514217c2a9f2f509ea7128fe0938c. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:23:32Z), 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/USCGH1020438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1fc68b5c5b9e62fecdeecb05e9a6f30205cec9013ca08b1debebfa4120f2eb. 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/USCGH1020439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf780338963b9a50fab8df30766580f0cfbf8d92ed446b2cd2b62cb6ee2626c66. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USCGH1020440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ba27e7c2bdf24564b48440723231c079702993d69c6451fb090e2137b68b1e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USCGH1020442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3030e1900d7d2fe267a1ce052071a811cd273f00f56c242ee2c3df4ec269d1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USCGH1020450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc574f1ddeec6e47090e3d71db3bbd0577fdb30aa11f02666cfae2656846fc061. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGH1020472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4be29285c6143c3daab528c5c8f285b3e1d581044e1ac4ec826a480e29af41. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:16Z), 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/USCGJ1105593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828f856b157baba9b565d850876609f047744ebf93942b2adfe936809dd66f36. 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/USCGJ1105594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd2b02d59f5be015de3c2da318c392fd271966a81abdd13a5df9ccd3ffe9e3d. 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/USCGJ1105595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70798739c0e00e62f0c91fa88bce133b66a13426cd55713d360522b4a25ad80f. 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/USCGJ1105596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3f8727b46b3ec8aca210df98162c41759e1c9d5dcb3bc9bf0ba28f85a564cb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGJ1105597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58ace9cbf4d10590cd598be649c4c48b47717a18e25b58c083041ecdb5290f8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:03:22Z), 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/USCGJ1105598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd017f1eb98f50e2887fff49202c4714606270fcb190ec8798fa001b9fd8d2dd3. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:45:43Z), 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/USCGJ1105599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a16b6a3548c25d077c362ea315c1e9b83ffe08c57e9af98802b0a0354493755. 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/USCGJ1105601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c81b025b787f5f2982de5f2a4df3133d1d5a54d89f1d500c3d437d458e674db. 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/USCGJ1105603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcee9ef1b2c045f47f3b1fa1e8a871eff88672b842228423eda22d887a49547. 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/USCGJ1105605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce4f95da1d6a6cb25264a28eb96dc26618cb2c8cc6d198e7c131ce743769e36. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGJ1105615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fe3373bc3ea6fe5ad5c1a86de6ebb7438f741580275359abdab9694f491957. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/USCGJ1105626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b52fb3ebf7f246b62398a2d5c8ccf1d43594d1f35c2bcb869b7724ddddbf53. 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/USHM91316559.