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 0x7495cc8ab136000b975db3a1facc7fc8072908da247d7b8f831eca7e43f62a1a. 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/0f54e4e4-b0cc-437b-882c-709e21736454.json and https://artists.proofprofile.net/proofs/artist/0f54e4e4-b0cc-437b-882c-709e21736454.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 0x156aa5aaaba3f560d7614c12fce337d729e9d67ca1b28ec6fdeb9316b12543e5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKPL1977673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385ebd053facceb871753d59a1dad94acea456bb6f7716fbf7d4a0260c96dfd7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBKPL1977674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d98168526db1c81a0605a253d67f001cffb2ee15255429e504033077dd1b3c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBKPL1977676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7e9ad9f7ef9e919bc0b75dd6c523a338fe9aaf3ba0dbfb7ce2a768d8c5e746. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBKPL2162403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68129de8f820540722e97be500bfae64352e05b83a7ac8ae329278240b9c50fe. 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/QZDA82312035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17a0e78fd00fc6afbef9d967b2261fe94967a63378e729cbb415126f85be6ee. 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/QZFZ22364118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243d4c848b46b867a03aeb1dc2a3ad9d3e08c6df4e785a4c75cf3e00e6501300. 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/QZTAT2285781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cd489c1fac8046f8b7bb4a2deb7007ea2a8dfe334a0b211f343fc47a06e5b8. 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/AUOMK2300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca67cb6c253084f418ca8a103ce22f19bcf24ced58a6a539cf1a061a1d2c1cd5. 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/AUOMK2200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68129de8f820540722e97be500bfae64352e05b83a7ac8ae329278240b9c50fe. 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/QZDA82312035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbe4eb19ad5031f6d908a53bd9c0cbc5bc4bf9f9763f4d7faedafb823172429. 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/AUOMK2300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7196581e637fbd890d7bdd20f35ba440e47414b231733fb0f2e7ca884b2db8. 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/AUOMK2300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114d86b797fe76d02eaeb9f8c9b430e4f900f3c3bb500a8c34b4e5e1f574a411. 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/AUOMK2200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f23dc69d8c03c783ebf5f5bff1829c66a41338ed43703c1ef19891e908a20b. 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/AUOMK2300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa220c336f0051ec439302422f5ae99da85a341bcb4f5b5efb1eef11701a6218e. 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/AUOMK2300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91b71da6a0731e9c2da0926bb600cacf28328d6e45c491576b62ab55c33f862. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AUOMK2300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc12517d586f3f17a107184c352b5a3fb4341e02783651e04d4ecd4efd410ef4. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/AUOMK2300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a385971013658c34e1c02b186540f1eb7c4e26eb3d843f3bf1eac15b4a2991. 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/QZFZ32578396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a385971013658c34e1c02b186540f1eb7c4e26eb3d843f3bf1eac15b4a2991. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZFZ32578396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5734173b1d23343fa53d99a647dd42265ce04b96bca1257a2a5548d65363326. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMER2522642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b31b09299c36fdc69d7bf71eec936602dc56ce6ac4645726ef01dcce9014f0e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN92572562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a385971013658c34e1c02b186540f1eb7c4e26eb3d843f3bf1eac15b4a2991. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZFZ32578396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af6829dd3c1b2d2210ff0888b5d9d29b93c81b4100437764a35158ff92af01e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTAS2516211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7c8156ccb54f8399c66e5c00de0acb310b772df7302b73f1a28d6523439a8c. 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/QZTAS2516212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98003f774770a460113b145db2981d30d00a9ea5ea51109705a3724c52fa0fc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAS2516213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5734173b1d23343fa53d99a647dd42265ce04b96bca1257a2a5548d65363326. 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/QZMER2522642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b31b09299c36fdc69d7bf71eec936602dc56ce6ac4645726ef01dcce9014f0e. 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/QZHN92572562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df8332a238d1204c6c7605ca37b0047d930d6c6e1147ec4a0e91b54ec98a2a5. 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/QZTAS2516215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a385971013658c34e1c02b186540f1eb7c4e26eb3d843f3bf1eac15b4a2991. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZFZ32578396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d72cee9c59a341def0d14bc7b519f47a478074c39adf3552b955c57c4234d7f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTAS2516216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb72896e85f39f306eb4d49fafdffac86f4660be5b6f5323cdf7cd89da6c7f8a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTAS2516217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629a264fb06778451ba336790079818f71724aad2011814bae70c2ae810bcb57. 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/QZTAS2516218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db52148b8680ce75fc4b1169e32b0dafbdcd2f5e512190d9410fee3857f9138. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAS2516219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50819eeee9872157a9114c00a8631369844926f3982538622ff59575e7d23cca. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAS2516220.