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 0xcd35ef221644894bcfbfcd025fc105c5d085838355ddecb6d9f2eb411e2830da. 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/955e90eb-e2d6-41c4-b000-c0b841a2cf7e.json and https://artists.proofprofile.net/proofs/artist/955e90eb-e2d6-41c4-b000-c0b841a2cf7e.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 0xb73dd24b6b7de580962902b265e87f3a274bc00f75a1def9ab10e35d286d54a2. 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/QZHNB2539536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c5be366aaf93989d450d03b29f0cffdcda290827cfce2f7c87b66efbd58c5e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6Q2554311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf587a1d4306979a10f20818c28fe59855ed49c5de0e720fd634a226833909b. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZHNC2507633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1fac269a689cc5927ad0c2840483b20ee1b844c95eb6a9d7fa391d20340ac2. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:49:41Z), 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/QZHNC2509313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3d34056d31a26a4f169cdc1cd1aba38f29efec9ae384c1f79f41aa98b92a4f. 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/QZHNC2507686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b0521403227e102fcb4a064dc0ed0bdb301b94f563ffb1d703630c144684a9. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHNC2507704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bc32a42102715c30061c896e31d3888e6d96b8a29ae603dad4851e6ee10eb5. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZK6Q2577229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab7abc2521c2a07fef63224de9771ebb347a04d46eaa100551398769a203c57. 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/QZNWW2592625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e2e5b2b72d6d67d48f18e3ab8bacaf634c7f3e03eb15f5df65e769d83070b1. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:48:18Z), 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/QZNWW2592628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0479ce94b986ded76cf8a8e8c26cb26440fb7e06b9727563ffe599a94edaf62. 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/QZWFT2599080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7defbad2b611a8088b7cf041152aa30fe7f2f8d11f8865317a249420f37ad9fc. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:18:24Z), 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/QT3F92564670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae3012ffe182eca1d3d66c815be35bb63d1980c12527ab5906db4ca749f2ab. 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/QT3F92568385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961016c7bf4aff23b835c80eb2553c051bc6e8abbdffdb5229ce8fc08693b1ce. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F92564707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b920e20d38fd1570db776efd18b7444d3aaa4cecb5ee39cf44f9dc292e0459. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F92571246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc33e4336fc3c2d262eb9cf8ebf89164a359986ff68d3d85923a7325ade00cf8. 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/QZES92250003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750e22ef01a604d7ff85d977abbe44db4f738c2785cbaad31b018080074e2c0d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QT3F92571249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeefe056750f901725ce1805ecb05edbb01e6920649fd12d122a14da449b29e3. 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/QT3F92516879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd635cd1a667d44bbdccd4f6ba38e3e25969270238f9afada742e55093e6f9875. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:19Z), 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/QT3F92526846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e81f0d9f2a1d3a7e45eeeb7d055d3c79f4b48d6e7874633c4032e3be24c6b90. 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/QT3F92529542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cccdcea19840d347b32297e58dd1866170c2b0f6f7edcbd76527f3360299c8. 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/QT3F92529546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53d5c3aed8d705789612b4acf038f4783c6b53d794f501a61727a67c70e94eb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3FB2546609.