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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91f8aa7bcdef8ea31c7320a9b0037c21e292b64edbce47bc21bf1c06f85e01c. 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/9a871fba-76a8-4858-b1dc-75ef52868b4a.json and https://artists.proofprofile.net/proofs/artist/9a871fba-76a8-4858-b1dc-75ef52868b4a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21e89c26e32a3b1bd8b6e4d5b5dec64bacfa3f974f99e03fe9cac9e0988d92b. 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/USLZJ2230433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2327f82d281e30734ffd80a285af7842075b0408f2e6fdda8e02b07b28fa1d5d. 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/GBLV62105584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ab99a107cef9187e86a8583a19a5c061a62fb40a70ba4ba1ac348560a6a139. 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/GBKQU2293636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be7e3c70495066c8fc9a850d752393d9c9c5c66fe392bf41f59209a2c5ad1f7. 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/FRX202366528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa505510a1b555400a5ae2b92a1c0c77ead77d37d3d01c03790f9bb1fcb49dcc6. 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/UKR6V2320693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2cebc112837894a5caf0163abab83a3c64cca5e32713972131849f59cea3dd. 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/FR10S2528317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252586314c8a684583f2b69ac51533d94037a5096945f7ba2a856ee029f348b1. 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/FR10S2528318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a618fc306ed60e118a8d4acd91d458ac6aca1f25af195296280c2e3b7bff7c8. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DGA0P2400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21991bb7e07ae31014674501ec27c91f82de20dd73cf38afc98099a05fa8ed3d. 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/GBKQU2453286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f66be648b0e30f3d987aa194e2195c54ef56535b7df7844aab76b8dfba64b13. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBKQU2420355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09df5aeb9f2856ceef21a51158f0ffa0f6a4cfb5dfd77d0da7fc10a73e1eb9f4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBKQU2389247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248dfa19d8211712136ad0a23437c4ebf4f261ca7047dd5aa2ea297261f7efaa. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USUYG1506814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b2458789faf6c783a856a744106831f6c2f8b8519caaacc57a0cc3565b25dc. 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/GBKQU2352546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d8f0b121675a768a157cc7bf0753b9b7736d69c4d4f6bfbac1c52fec534c93. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BKBLL2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f9212860c26de3f9e5034e9768266ea3f551538b218c8dd892ab309496706c. 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/FR96X2378109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f3f10780cf04b99cfa4fee4492c68cbe77f30e23e88823f8f0c267ceedd70b. 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/FR2X42307415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb551f1bceb13743d4ae54c06021e0e177f22208e57f61eb2c2753413708666. 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/DGA082238334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29033fa52a53091dc9f304235b46a3c5f26bf935f7e4c4bad53e4850b041ed16. 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/BCOTE2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547ed9530b4fbdaf5fd11d37fc23aea54f9dcdbc3e1c377c3baeb5cd7a757332. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBKQU2283792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048177e81c11c034b2178dc0ae1ab8cdf7a583d81a848d0a083d3031abcde4cb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US83Z2229848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce7fa9f94f0ce4a7e242107cee8b3366154610e11d8096058e0fafc50d07647. 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/QZNJX2275363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e926613986959ba3b441b409308669f709ef7b6594cae6db717a9525912f85. 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/US83Z2217520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf435503ca38a80ae6b6a8bcf897e18a947e94ac686d53dd25ac43f35c93941e5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBKQU2243513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b61184d93ff35c10d35adbd8ed89b1d447f5bf6dd4d03a0a570b54cfe7e2142. 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/CA5KR2243073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8074d3fb037fe14f0bcbe7ce5e5502ea7ee6011b224bb43eb73c85962c2b33. 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/CA5KR2243075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1065208e634e883c60dd0722875b987ae1bade54a84206a13c95de7b71a30d3a. 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/GBKQU2242357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fb7735199f585e19708f8456775bc0ce2249e25970a3894824dab049de2b79. 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/USLZJ2219835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3455d447e3f8f4919b88934a0136bb60a37634c14624c18f26ee23448f067a3d. 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/GBKQU2228625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41823224303e3514c6ff31890b66b8dfc302db1ad55512e6b0ae1fe328763abd. 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/US83Z2205472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d2415f6fcfcfeba568a8da93710397012d19e509d70c2615d3fe0e8a8860d4. 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/GBLV62136194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241a973794b5a6ad87cf65b884e072871b0e9b1cef382e5c064a212cb5c7210. 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/USNRS2141498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead4be21ac8368fb0f8761fa88137bb4e68fc2ee7994f7b4f9e0bb04013caf2b. 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/USNRS2141499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aed66924d0c62ac02ec561ad8cce4466c2e6a9c221235b05ee304c62270832. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US83Z2144070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216cf2c94d27b3c5524f3b236daa365bc8322a6f380e88bb029ee65e5ae65ac0. 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/BCVP52100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d3617927cd5fce2313035691cff47507c254d79ce8b626c70e6b84e8fc6300. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BEE202100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3164ab5b1907d2bb8c19be07332a2ae35795e4ff1e87e9932be6d8b33800d3c4. 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/BXIED2100048.