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 0xe930a1fce2eb94f24a0f840ed91b10e40424b1d251f487eeb7278bd9a3754f26. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3109d7e-05a1-4c16-a63d-65c75b90bf9c.json and https://artists.proofprofile.net/proofs/artist/a3109d7e-05a1-4c16-a63d-65c75b90bf9c.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 0x371111a13b81528d97ee5b6000f5d3fd5d272dd81da548e621e35c8a98585c67. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZFZ42055593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaa2f77f03d78092d989982abd81374cf98bf74cc970c25b84889f1a675cbe5. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:04:32Z), 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/QZHN52006871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc344c87b5719f569331fda42bf7ed4c388605c56913c22e3a0b54cae8f597e7. 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/QZHNA2050368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae6c239272392d1904fdca70dafaac732f14b6b41b7a8c78e6c4c4418e90bd4. 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/QZK6G2031425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cd0ba3b5f93e71915ed04d356d8519bdb881a8ca9cfe1788e6b2d8155becdf. 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/QZFYY2103105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2f85a1d84b3dc2d1ca208082f5b894b3ec4c2598ab958c854f205e38eaa5e8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:28:31Z), 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/QZNWQ2190010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd226eff34842bb390d2d28360ccc4940a105df877840997d3dbb6a12587599e8. 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/QZNWQ2190013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463f0c51fb5452b9d9d6407fe24c65a214c1b56f17c41032787f023c10e90068. 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/QZNWQ2190016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c37b881705ad0bc43370c4f05ae0507f0bbe8b4a09664c30661eb850a9a83c5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZNWQ2190019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6354a277069fee47b446b4e21bc19e866b09e0340e448957d7e8b7e048f18ef3. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZPLS2135439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce54912a81680a43a5937c8d44e3b83b327cc31019a630e9859a3b8c20320238. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:41:19Z), 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/QZPLS2135440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eb8ee3b9949fa940e9739bfdd4400769dda5f771e79cfc10c428be62f82293. 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/QZPLS2135441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0dd780248f14af8d81787a5fab606e9564ba326b665b3240784ea690fd7cf9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6N2242454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd214aca1dbcd9a618335bd57624802073050cafc21e6808937aeb9994c8a968. 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/QZK6N2242455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7ec584e984b88e959ae4317c3c0fd463015e7c46e4c35149b744b23186d0da. 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/QZK6N2242456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622f9df20348818a8ba7c78cafc563c6975c95071d1443318b3c819ea24ae8f9. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZK6N2242458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b639e9ecc8b555ae008798b246b92b7a4a35fb0a6522241232381e6085d23b4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:59:03Z), 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/QZK6N2242459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceb1ebc061c2779930ad6704b7e9411c7de44e868831edb1b8075c1cf76db2f. 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/QZK6N2242460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528eeba77005a881bea17472d9b4ffc1799b3e47752ce461f9de1ca3000822b7. 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/QZK6N2242462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089f0dbd2d0d071ff3b87ab31c0a1b5ccc046c3aa8532c2dd07cf82e5d75b0c5. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZWFS2329420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759766c41d76ef7b48350e4e9823a7946f7e4021d1a8317266acdf833df21f1c. 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/QZFZ72476656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c853702db581087f384cd04ba6b6a1386a8c17ba9dc65c71bca999f9cd34ac. 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/QZES52471121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5b58f5c9962788a3eced2b83b2a1aff4490ee5939a431d9c822d86e984408b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZMEP2488175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9235688a00625fc15e01b8fe7c8122789f3a75dbe27ba9a0bf14db112af8956. 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/QZZ7N2549264.