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 0x3d23a265d9787d260a29c7458ad369230d146ef81514090c093e3f816ea27ff6. 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/058ad9e3-1dc9-4c11-90e5-226b990d4d4b.json and https://artists.proofprofile.net/proofs/artist/058ad9e3-1dc9-4c11-90e5-226b990d4d4b.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 0x653ecf0c36c13f911d69e8981b744097b09deba80698bacef89197f562cbae2d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BRBOP1901256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f92643f8a8c2cf7aec15b14f47a7690fe11ea85b159ea5a611169a7fc04006. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/BRBOP9900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53e577c5870feea08caa91b4940221eceb829e194a5350721271bcc4cce8eaa. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BRBOP9900167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fba8c3f84d98832f8a946b7746b5b7313773c6872344f4ce39f03abb1c15ae. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZ5AB1947033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963eed3ea03fd1ad32b6158cda1ccd128b4a4d038cf6d45f44d1c6877a601896. 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/QZ5AB1947034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dab01ba6d4aba8845563fb291ff8a702d4f5242c9807632bd2b07ea901b722. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZ5AB1947036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715d5de02e6d2eff1e9cb175bdb1349f7f2ffc73b6d5750ae0f82e32c20562f7. 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/QZ5AB1947038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9bdc861e2488eb556246cbaf53faef0ed86e0f08b8955823afb89461a51332. 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/QZ5AB1947039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9d227ed644b6a5b30967441636dce95f9e72c277b362e8226f8410b97eb1c6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZ5AB1947041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faa432040253af4154123aa3ae00b39a2dfb757aca4cb2a6bc5061e32af184f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZHZ32170651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec8e25b4e950458c8f67d20accc28ffc9108c943cbf7441c4cffaf42332ff5e. 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/QZ5AB1947262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8630b1eb6b72da7c99f7c86f4fc7ae253d0e8fccc5963c1c4f5581e2561af674. 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/QZ5AB1947264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b26c2a2e42cc2ae5a1cf1d2c2e821078a171e0a9ac947367c8699a5371c685. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZ5AB1947265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4593245b24ef411061632b6ea06829f470928784bee48f0f3c3b8bad14db2de8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZ5AB1947267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b259e571c544edcd9dfcbbbdd8166998f8705807c9ec576aa080f0314348d34. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZ5AB1985363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3918d70878dadba3f308c85807dcad46d7197142f57f06f0684657805c7ea907. 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/QZ5AB1985364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69aa9c28c6339dde8e9dde1b903a0cfc8ca22c023b9aef962b59bedbbb3be98. 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/QZ5AB1985369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7325abb0bec10348bdd553da3db1857edd8779ada285a2bd7b094e7bd8172ca8. 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/QZ5AB1985370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057cb7d077a86b13445e614826194e0ea176d9a62dd9dd275f971507faabe575. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/BRNOZ1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5067e9d6fa3fe4e1ad37a98f941c0cf334ccc4d9a610621ac7aa450fc8908889. 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/BRNOZ1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e72733db6ea5c2b3bac40a0bd03f029e5ba90f5b2360b91d4b843a3f8cca63e. 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/BRNOZ1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c87f0a9ef544c1372f17c0839cfe17359cf2f8c572ef101842ce1c5c9621896. 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/BRNOZ1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3169c85ce6c932a6a066570fe0841275b27a11b6a8164f478fecdf27542b1e7. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/BRNOZ1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca52f0e6167b13818f26c82fedbd5c4ba21bc0b049b42dd95a7a97680c26c00. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US7VG1918085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82095e1f78fa5f984e88aec51a7b10205994e17a44ffa8e03c0bfa209e16a25c. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/US7VG1918086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83579f26ee80659e4352db1f8325a80f37e73dd1e4a2ad10758cf546d5c7c8e0. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/US7VG1918088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3521ae28894be68b560b72ddb145cd1070ad947280077304ea58a5ac7d343f00. 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/US7VG1918091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b077624bd48c672099baf7ffd1ce42e10abb6654b5b51c9b9ca0dad59c34a4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/US7VG1918092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefb2d3ef0d8b1ac8129f1d59481dc02823c0ce797dc94280f2142a14f1fc110. 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/QZGLS2308968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c986cb5a5d46072e117aea0dcf6f5d7873271a6e840bd92821d32ecdab727f2. 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/QZW9L2291845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd891b06c198cf38879c2f44361179167234f156223b7a0cf93ddf034fbd9bc3d. 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/BKPXS2500002.