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 0x7763f37b87eb9def38764e67ebbf35306e242ea99cd809594eb2c4797898d18e. 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/08f6f06a-bc5c-4a2b-b9c6-7dc5173e20f5.json and https://artists.proofprofile.net/proofs/artist/08f6f06a-bc5c-4a2b-b9c6-7dc5173e20f5.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 0x6bd9e87003031efda24d48d40e86698a6c9e36ba58013201812c7589002c80f2. 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/DKJ6A1410301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3c154e9d1ca923516682126a408d0e851370f80ddd7dec184ec65a60d4808d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKJ6A1410302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d674249fc8c7aa732a4f6bf82c69008c9b646d9e690d7d6e8866e6d5f390df. 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/DKJ6A1410303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519d01c8f8f97e8b869c6ba0617d0e99a366ec965604e1627ae371a4fb5784db. 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/DKJ6A1410304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef837dfc676fcb14d7d3213c9dada219a5343facdc1618f2d964ae75445d243e. 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/DKJ6A1410306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41843d560e44cfb612dd3bc70473649c584d79bf30b968da32047bbed8bf38ca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKJ6A1352606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a2854618464bc7d8c6ac7459c3f8738a602b288caf7e25e6802979cd9011da. 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/DKJ6A1352202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7739bbca94837674409f139a097fffe5a47a6d4bb7cbca217e9e2851d59071. 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/DKJ6A1350911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2306f7e5ce511779a590bbbf651fbbcbf0805f00811a807ca5b1352a36c2bafb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKJ6A1350916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254eb78d3c2b5e8f210c7c5e36cf1a69de3e2c9866abb5554c10f8e3f72c3086. 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/DKJ6A1350803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ad4b77a5698a1f26c9fbd6be0670262a828e4953412046cce14f124ce8bbb. 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/DKJ6A1350804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dee3a450e7158ec68abfddedc343f2adde6b60c12d32a2000903c260f0409ec. 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/DKJ6A1350806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097fc7d6cd0cdaaaed7b8de369f2008885c2d109b6a5f16fa4c72f0357a8eaca. 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/DKJ6A1350808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e33f54b9fff901ad4c0630926fc0102c45c950752555d881b10af1f1081d0f. 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/DKJ6A1350809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eec1e66b12a962806137a2317f57fe6846f959c7718bc7f5d50dfdaddcc957. 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/DKJ6A1350810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639001bfa742d5cc56371e7e70e16b45980c82f7e5ebfafe3e81888de3070e7e. 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/DKJ6A1352601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6e4dca342bd0b6904103a59d539ea0ed954dd9da77626b2cdcfce5542a2baa. 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/DKJ6A1350914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da638db0748308d1303d0448fbc3b5b609dd7fa1127ff4446023e3e5ef6c3b7. 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/DKJ6A1352605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41843d560e44cfb612dd3bc70473649c584d79bf30b968da32047bbed8bf38ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKJ6A1352606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68edb5fb399b87eae9846557b3f7021816d5a1117940f1830c4f056e9c909582. 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/DKJ6A1351511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5237d1efd3027c0d1b60327ad20bd689940af83ee1c781c64b0512cb3829ceac. 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/DKJ6A1350908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca92e74f5f6350fa464c15c6b219f243bf0785b6a33770bf041dcf367bc2e267. 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/DKJ6A1352507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87670ca7b5f8b636becdc78dc31eccfb7ee379a5321938819fca2883aaf447fd. 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/DKJ6A1352515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085b963f8029865c7fc73d9dcda4cb385e738d867f88f86457e5320ea1128024. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKJ6A1351601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4779c7803dbe7cd8861505965890d74fe6293f2673a0618fa460dc0c547e92e. 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/DKJ6A1410414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18145fd3ab2f6ac8e2d2a5abaf9639d42cf117285849dbe04ab3a233fbd84fd. 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/DKJ6A1352301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda762a69631c3cf3c816332b1bd8daf96299d08dd0c1ba5b25209ef9acfc3f7. 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/DKJ6A1352302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b1145d0a48f6bfe6a1eca63a464627252d28085a5f36b82983475d77167815. 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/DKJ6A1352303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e6330b87548cbb76402e85b4c8466f1bdbc82eb709e67bf0f47bc3f767307c. 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/DKJ6A1352304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68edb5fb399b87eae9846557b3f7021816d5a1117940f1830c4f056e9c909582. 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/DKJ6A1351511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc134b7ff903b11673f89518545f67ad66f757be07bfa95270210b6440834c7fe. 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/DKJ6A1351701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a1e5add658fe833f9a2596a339c48c65bb092595082929ff3e5e1985a94dbf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKJ6A1351704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39a5d80ba8e20c18fb36949d5778a5e22910e1d9494d4a3047bd299811c4628. 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/DKJ6A1351705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254eb78d3c2b5e8f210c7c5e36cf1a69de3e2c9866abb5554c10f8e3f72c3086. 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/DKJ6A1350803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f5702e34c739d603b22aae75cb61bcbec347088fce513fd9337a93f81b0bf4. 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/DKJ6A1351605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a2854618464bc7d8c6ac7459c3f8738a602b288caf7e25e6802979cd9011da. 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/DKJ6A1352202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb532256a29e803b6f3937f163c13c3cee567c3d1a6341f9f1c6c2f0d922dff4. 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/DKJ6A1350702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed3b38dc719a1167b66d0c3489f20f8143b41dcf5c310885ed5b7c313d9b71. 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/DKJ6A1350706.