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 0x76b9d7941198bf4317110bf910f20000e4a18a55c92fb6a0a3a1d3958f2a58c7. 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/6503137d-0769-422a-8432-ad718e4ce963.json and https://artists.proofprofile.net/proofs/artist/6503137d-0769-422a-8432-ad718e4ce963.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 0xf3e5eb55f1ec919b8297d6f718c57f7741ed22f484f0e3e002b907df0eb9913b. 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/USCGH2091647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79c4f4e5bb99152ab6b1c2c42e6d7c2b959c8db26a9ded29573c6a3c4a83efe. 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/USCGH2091652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e69a5609547a137f645055e8fc1aa89ee912e5a918acba6d57d34939ea2f13. 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/USCGH2091653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27d018ca6b9ff794e54f33ae1ed2bfc755bdf80f806a60afbe2284a0961857e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH2091654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073ef474aaad971641328293bcf057d1914a4a34959ba32b8b50b4e5951ae18c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USCGJ1829967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72c791bf260e2ec980e5e179332b6175a7223a92856b8d19c907a532ab003fc. 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/USCGJ1829969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afbfc04eb497efe0a1e4e66d6d3aedd219b2f57a7323bead33501355202a24d. 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/USCGJ1829971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89b77d54280e57bfb65b838a2536801f8ecea40b67989e7783ae25ff49dd88e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USCGJ1829972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9d8fbe10be4d7e420ee2dfdfa07bb493eb43980b86a424a5ead9b173dcedf6. 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/USCGJ1829974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4bab3365575eeedb4285eb5a039cd70c3e7d8f3561c2b95f5c30f04f703471. 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/USCGJ1829976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53ff55a57ede1f58677bf496dc3e0d5a3246d65406867f034f354b388e709d8. 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/USCGH1868283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa065a985d080089b0b11d628f940f4f27e92b518bfe2abe005579c028dcf6e7a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USCGH1868285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9886a0ec3df718b8a78fd127112125314c7e169eb1302bfcc616abbbca88a9f2. 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/USCGH1868286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d99904472200dff07270ed86a429b6dadd240a29c358fd24f4bb407ab59350. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/USCGH1868289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38adb5711d2e249c1bd650d821409e7d58644be83864c22dee5f69ca230e8def. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USCGH1851539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7033285d17f4956ef0d0906e2b4af1e95a4f79a0b5733603dc1373b759412e. 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/USCGH1851542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cda87e73f382393cbf33ab854f8e71ff3d41927588d793161664d43f50aec0. 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/USCGH1851546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc370d35f52d910d7503627c07325733b4d9c5c81bb939244f3dba0f5f41370. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USCGH1851547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa281c8c5fa27f58caf37abf4278673121228982cbf7402c09e802942ffeaea74. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USCGJ1814680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8296fed1c176d40827ce30f847b3a3df642cf5faf39938c7b88b5066c026a29e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USCGJ1814683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254ce0b0309770c4af458bba2f3643da49023a0241a30aac292449c515f7442d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USCGJ1814686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbf074b776221cf6bb35a43cb1c41bd75230a609cfd4958f9f6241dd4d7a413. 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/USCGJ1814688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49724f85417dcbdff28f0b9beb79224134d15a1af0f300ed29d48808a571c42. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USCGJ1814689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa31a139b506f5097bfc02c2b631366bc6d63d39bcbfa4b4463d34a5a756963f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USCGJ2006276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290cd4525b0efb1298ac86afed612eef812213e539f5ab07b56e4b50291d987e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USCGJ2006277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc201c80b62ca38b1cb693df6837e2e1f1dc14b83022cfac88fd3765b3455a2. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USCGJ2006279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd594d0ec1437cf68aba72bf69368420e5a6ca306d9fe316089b03bd2dcb4d2. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USCGJ2006280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7284641c64fead1cf4f4c0e7888310df756cdb997b066a2a79296d2b727e9f1. 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/USCGJ2006282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc692b7161ff594f67f5c756cb3784bdfb897c536bc374bae570b34570820eb0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGJ2006283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb911bc389a817f8b4ddb4cf248a0a936ca5345190491c42d1b71cc9e441d57a2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41782932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080754cf18af3cbef02d0a649bc007c68f30eb55848ec5294aa2c50855bd2991. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41782938.