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 0x0febd8a23b16149a31dc095e48c2e1e71465927d9d118108ed9e504b5627de18. 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/36ae150b-9d92-4f14-bd3f-a40d77f5657d.json and https://artists.proofprofile.net/proofs/artist/36ae150b-9d92-4f14-bd3f-a40d77f5657d.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 0x429372b6db8181d49c7118ec570c4fa31225d6d2c94115a272252566768803c8. 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/USL4Q1870573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efd557b5088450f5eca5a9228e5ee3b8b565c87244fa0928dd6a424a6a2b5b9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:07:05Z), 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/QZMZ92496780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe299356941f003470f151d4dc0ae4e4a18b30282c5172140ebaac3604fd6fc. 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/QZNJY2442091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451e5be96bffc2790720f32444a71663cb727c4100f05548bd268efb1fca6270. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:24Z), 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/QZNJY2488458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9d7437ba3402b364c52af1ef8801e47c167e95e7c6d9513d937753b04632dc. Chain 2 (Bitcoin): anchored in block 957529 (2026-07-11T06:30:13Z), 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/QZNJY2488459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16efb6fc6c1072c71220c5f3bf86c4436a83642b3773dfed138e5ca5d5dda5fe. 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/QZNJY2488461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d2e46706f9865ce463b86a8582cef798a25c61961dbbb073734f6bd23ad3e2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:12Z), 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/QZTVM2480932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06518a243c25f3fd55f3b5b8854de9928f97d6c40c67bde0ed6868bf5165c0a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZW9K2408628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebd066ad79ac98779269d4e9a4a9651acfb490065129ef74c5021a7303c7962. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZW9L2479061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ca85461476efad80ae611b2285ec4f4f829fcb532eb0448ff176034d4907e9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US7VG2541647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63efe6fe5c9d0808c78480e046ae97fe043e29400b1afb97e6333e1e944941d0. 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/QZGLS2522272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853a118d1531a0443330e4cd97ee45965604ccc79720cbc6a5be12449fae20e5. 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/QZGLS2542601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99245119921a3a54109db16c389a296b6aee6d954ff42c9506a65d540ecfbf74. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZGLS2539663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b69d07be76290ab4fbd9d9ef3e7378e1bc555c52229aa70f3fe5e14fec6e12. 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/QZNJZ2586031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc96b44a360e1b200046e718cfaa755b84e2aee0566e8e0826f9cc217079d6c9. 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/QZNJZ2589174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7713181f1e20d779f761bd1e9aa56453d1bb11900c9f3a812dc84946aa3d1eb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJZ2589176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe5fe77174b44b66fc9d3cf1654ad411e9dc851667569e3f953a1188b89365e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:44Z), 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/QZTPX2504247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757212f72747bdac410f5b915e2cc0cfa2ffb2722504f961525210634230a3c5. 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/QZTPX2539063.