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 0x7586730e36c6cb8b04a6ef608e433a355de76c6650584861f04a947f5415f7f7. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f8c013a-4e05-4bb5-8aaf-e3e3cdaae190.json and https://artists.proofprofile.net/proofs/artist/3f8c013a-4e05-4bb5-8aaf-e3e3cdaae190.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 0x6abc0ea3f069231c2f2f1b19fcceceadedf17102455b7b711ed6b7ffaef7d145. 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/USA2P2160225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc716a4d0fa6bec2c03d9b8fa265b82cf0c44ba96b9f9879744f1e1247ab64b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UK9951802201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fdf49ae24e04dba134588209f0c397a53233dab985c76e16d496efd6a87d97. 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/UK9951903402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0c8e673478a6bfa3c77a78e1ca29ff660e1592aaab09d5d91e36f54bf7133d. 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/UK9951702001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7c986c34716b357f9a0c2d7acade3c4d0c465b2aba56a195acdb298ac67ec2. 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/UK9951802401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f8fdf1eb8c83bef3141cca9c6c29c7e68bfc52170048ab54b62327ff6ece36. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UK9951802101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad664d6914fb2391645d2ffabdf570dacac77a080748fe3f1f5ee6d5369410d2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM24S1820110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb819cc1ed9e3e704dd7c1a2d31cff1e3fff8c1be5edaeea6563f65998b784f91. 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/UK9951903023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9095c5f79bcf1f1972238273968e88d48df2aa0764e88aec879e2415502aea00. 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/GBENL1902639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e82230a3b6853731ec6c0120327811003316e7f9a534b37e04c1c1c7ae10cb. 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/GBKPL2096363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cda099f6036914157c8eda127ca22b4a60f25714b9ad6e877d073b352e31d8d. 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/USA2P2029649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3715e6204fd7b93e55bd88e3241669a179b324092ab7d737e38de08b45354adb. 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/USA2P2114337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e1ceb3b661938555c7ed05ef44d0252793737465354eba34cc4b4832226c6d. 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/USA2P2140907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210d7b5ae807816f8bdeae8e3e6f198172eae9168eb7f47dca30bb0f02597c1a. 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/USA2P2138161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ef9daf65b2651cee03d8aa98a0703c4104e90695a9c66a70a1a1f70f405061. 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/USA2P2203496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2106d65f766068f98d80bc38f8a77f5f954b5b686187dfae239e0857a2eb691c. 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/USA2P2215984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843751d020919ed77765bca4309c399759996ab6816a91f9fa97a2bdddcf6afd. 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/USA2P2208728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f9b0e70c67f543f79e3c48727f81184cfdd3c4eff6bc64d8b7da02ff22e230. 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/USA2P2214187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad36d211544c1e81d78b06c873ad8792acd02266ef1325f2008f00379cb7e53. 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/USAT22304583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453c8096935591137c96546e99ac5954766fa4fff422dd82c858872db9b56eb3. 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/USA2P2206428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e1e722aa8f14e385ccf38d4445e640ac59b5eb20167570e2cc39bb07b1b0fd. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USA2P2206429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ef9daf65b2651cee03d8aa98a0703c4104e90695a9c66a70a1a1f70f405061. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA2P2203496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abc0ea3f069231c2f2f1b19fcceceadedf17102455b7b711ed6b7ffaef7d145. 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/USA2P2160225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1226bce9eab13f12029c558c63436b8811af6f17bdb7008419954460468b31. 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/USA2P2206430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76de58f0cd43b9992b3743809723c22a7e1a9fe60102da9e49f7222d4bdb6d2. 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/FR6P12200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ef9daf65b2651cee03d8aa98a0703c4104e90695a9c66a70a1a1f70f405061. 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/USA2P2203496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde542717e89da9098d1c7ac286b6a5c76a96137ca16426a6663ea3e876cc84ac. 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/FRR642201878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4414f1c17f336ee51b44a2b215888124294f8ea439ca12f4c980d5a938f9ea34. 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/FR9W11618941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c474d4852dd0f50f8ee3ce060c76d766775a3b3214229adcb4008edc0f7e815. 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/FR9W11622419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a90ac4642298ea1481b7653a9eba61b0a70fa32a9b77b264ad4bc742f175c7. 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/FR2X41775000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adff2fa7608e5fef6f062bcfb4e497930965699cf3ed9030cbc18148a385ddb. 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/FR9W11609198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50517aca201ab9ce2e668ebd9a2d2860dcf3abbca8831118129eb82244de01bf. 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/FR9W11509763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a5542ff7b9d56cb0de8d4d9b0bc58ae62792ad6e2740373c410999a2a57d58. 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/FR9W12003535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c272e9fedf3e84a8546ffbcce092da02690513bbc044fd61c9ac14bdc301642. 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/QZWFP2318389.