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 0xc7bc0af8b8cc35295e991770217459f7070918145c788ee61f73a9179535e7b8. 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/23a4cf24-4703-4366-8959-3ffd30a3add9.json and https://artists.proofprofile.net/proofs/artist/23a4cf24-4703-4366-8959-3ffd30a3add9.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 0x51b80fcab96d2ced041206b44398650e7e98ea67cfc36d4d981928d731aa6363. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX991595261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bbd51143464a47c1d06599263d923d7e0a22b71e736659c2bdaed2c5747ee1. 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/FRX991595262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902806a45aa0e6fd7b3b8e6a32fcbb08cfb787a795e83159855a6011dfbebe54. 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/FRX991595264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b28bf85237b4a2d74031e93a950fe9c4c21391df7cb1a9bc8b74d81dbfa7c2. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FRX991595266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc474c19c4bea8dc0f0507d339d8e2fb8e0163efa5b84b3facffe9533d286a795. 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/FRX991595267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332efff44a3fd157a6e5e1c5c9552b9968d3dabc7a398893c283c0aabc80bc67. 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/FRX991595269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fb0d0597f4e258f278f844014b1edd8dc1458addbfeea44500f1b33c610e3d. 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/FRX991595270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd638128b03e8fac1c334a8da069e6e9e604805bc223994d662b7865f80f994. 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/FRX991595271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5801747547eb64bec250178485db240dc0b95adfc6003d8e5d8184f47e30adba. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/FRX991595272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8478bccfc4d4c49cc3c6668473e54a779e1e518b79545496022081ab2e0511. 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/FRX991595273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e492008376ab64ec377814c608bee3e518eb3a33c76b8ef9a9c66b2e5d914a. 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/FRX991595274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484934b836901bb40947079db90a7c65ad7fe4f594cc4bfc74d23dd96a1cd638. 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/FRX991595276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885723d5b7284fb751c131dcde6ec8f5906774d090449f6eb28dcb3681347955. 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/FRX991595277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27ac96e3e9720bcbc72a7ed6c9a946269654e4af85fb6eee49caef26ccaa962. 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/FRX991595278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a49e63e24762e180111ce9f25e2efec0a23e69fea95df3a96218e5e9fba77e. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/FR96X1697243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7fd2b0b6e4a2090233d6b70f426fe8cd817c5283d71310db86b7a045fb18af. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR96X1697244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea82bd20d8e55a7e653ef25512cfaf0f08d6c3d43bfced46e0fe0b0f9289601a. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/FR96X1697245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d81d87a62d3264d1718ae6c8d444933360388520c628158eedb6475c5516c1. 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/FR96X1697249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3626f8da43a35b3c66657074c994bb9e28ea4be4a29ad6389a03b62a82a2aed6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR96X1697250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f20414fffbc540f174d365214f7654271183995c30da5319b8d7e18f045e413. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR96X1697255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664415e75133015877b10c3f5dd758cec9873e18ab339957bc3b30610f4af1d5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FR10S1824858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fe8ce6312c42e1edb919d79f17f393797dd3137633528696f49b87ecd73114. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFYZ2173621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8b4933f6cc20131f5e290f5bc69e3664cd1e6d52538ffa93aa385412cf0f2c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYZ2173626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706dfe459b4297a6f8953c9376b4166f2fd3b3d9372bc4583d24b09068468a7a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2173629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbc23010373c8976fe3a5a5fc5383bb0ef9daf21d6c954046960dfa10dafe2e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZFYZ2173630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf588912c05c577aa9da8863026853f05174e9a45fc867531c00b6f415f264c8. 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/QZFYZ2173633.