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 0x178409682ae76a46e7904bbe101456308c74e314e6f5569e13f9fb624bddd996. 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/55c1431c-dfc8-4ce7-beeb-2a617bd13b1e.json and https://artists.proofprofile.net/proofs/artist/55c1431c-dfc8-4ce7-beeb-2a617bd13b1e.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 0xbac38eb5d9571f3041be816aa71b393c3d9d9352131798ab9f4142391390493d. 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/QZNWZ2459128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed0ba4e9a9d519c8620b750f1c7e6cfb27ba0580d32873efad158e899c35b05. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWS2447140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2226ad445e6de6b90f2ef03b4fe95d98269ac44d2e0276c2d189e2ba8f47bbee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWS2443742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d0f703b4e7f1715c7093130cf8e9a47cd04b6a8cd020dd1999894174e09df1. 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/QZK6P2445935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a5b92a973ba8f7e9601cd05ca009336f156ec6f93110f976a5498036fa5ee8. 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/QZK6P2445906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdab3ae5c49442ea14cd4f9e89a98f1125d50ed396dd7790d6c4ac6a1c61f43. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6P2445702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0579e129784a9398bfa94cda8b8f4e278f54adc0b1eae1e2f2ddd0f0ed75b26a. 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/QZK6P2445677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a10a05a9126cb127a6329b73e8156383f5cc323de419e300e78fa668460418e. 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/QZK6P2445310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3168516c6e1dbde606b3a51f3fbb21b6fa3a44362af457595d5075fcb9f773b9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6P2444638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9784d6da556b1feff376cf7327b01be363529a2015e1291fb7953b83bfc6aee. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6Q2428660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b995c2a953917b2dd8bcacac4adbf06137c21e7db42ac2f0cb5a5d2173ec8c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN92427667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed7fe49ebbeff19a53a5f05de2c4aee62c3c95060bc892d121ce2b95f3be35e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN72430165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94424e8e27a6ec44a935c0bb63238d68632a5fcb7cd7e829a0e6bbf17a55274. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN92472155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f71e8e4902fdbb108190ac7a5765c579adf1a465f6648f802457e52c95e9067. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42453983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649601ba6cd2a980020646e9253aa62b25024565a34ff63f2777950228059283. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES92418516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78caf0b2dfaa4e47dfc5c34b4ce4c0d72561108f1faba0fc0ac8be0e484cf96d. 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/QZES82472881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdffa9d63e403809411001b60541c146c4fd7755b9750448c48a8bf97c3ce78a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES72436523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0881675cb98e1fecb12a1f57feb6d9c86c82e9108c876b3f1bdc3d1dc5dff59a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFYZ2423877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda161b857b481904056f367f8d50da2a0bb6b4bcdc86ad34cb0204ad8b8a731a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ42493274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a735bd4d12f25459ce9d61403f9ac009291b37ff01d3573b21be1475671d8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFS2307465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63a3ddb3bdb0ce9a6cdd7418af194dbe42d3ef6165eef36e1533aa90bdde905. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFS2307463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5095c5cafb65301088b0413ac90469bc498d2ca38e0d1725ae42fbb185275ebc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFQ2315468.