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 0x4e633cd069a255179ae48b5ca404de7aa57e42669e28d6051aa8430bfca551c6. 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/11ae6808-ba99-4f89-b0d9-603cb3ad72a9.json and https://artists.proofprofile.net/proofs/artist/11ae6808-ba99-4f89-b0d9-603cb3ad72a9.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 0x70288cd749a34a06f04e069a3e4876ee40dcec09c3f1feb005766c22e03a6b1d. 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/DEQS92000816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca88ae528f8e4a7a637a948a35a0e50932479eb33bbfcc7386e74407eee2a6c. 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/DEQS92100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d116f2b1b3a2bdff258b5a85ba15c88c6237bfa8b0480f33e046624f86cc595. 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/DEQS92100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c62414a0ef2d5825542b3936c0b5f7bb40849cefd18bd81353c12cf609ab127. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DEQS92100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1810c64cc5ba9417b65ed5480be7e856730f1882b105bc86144af81f3e942848. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEQS92100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f2f63cfd461748fd1d1a0b6078d3c4b9f23881ed6b2bfa246871eb1a16831b. 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/DEQS92100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac09ba0a611101d7d51ba12b05e9e0ce7f963572f507dc51be06e183830a7bf. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DEQS92100151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a2be5c0fc924a4db10a33249ea2890a50edd9bdc4768e7bad8c4c8081a8f49. 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/DEQS92100611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fab875b489af5bba0e81306626c6db032fad8ecad2422bae7fe935c331647ca. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DEQS92100154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55885abf8e680975ab7c12ce9696f38d4d110e4bd01c4e4d9e7e9ca44cd86ebd. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:01:22Z), 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/DEQS92100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a00772b65d1b0d06731cc4751a22a4bf61f6e784cee6fdc45cbd244af75ae0e. 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/DEQS92101664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22002ee6492539b1b6aa3de8b74bef5dcd5d9ffa8575c199fe969af900e5d437. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEQS92200760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd5500f412f389683e4a0b7f2ec9945407d6d6193d35e5d1204e221f6ca983d. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEQS92201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31769ffa514c19054eb9cc5e51591b4275454c032beee0841a68e6b2db2be147. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:30:09Z), 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/DEQS92201042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecd096481326c842d6e68cdf4b2a770986785d423f2adbaec8e1e5df3ce8a72. 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/DEQS92201045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8758ecf15d28a13ce21cc028afb28829ed92dfbd96a6de858883aa1a324e7d8d. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DEQS92101844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e57741eb5259528d98dc0a79feb1cf3b3587de59753adaa9c38618039b2e34. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:06:41Z), 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/DEQS92201052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd5500f412f389683e4a0b7f2ec9945407d6d6193d35e5d1204e221f6ca983d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DEQS92201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9313169925598709ad033db19f951e13d2296e5625c8605023c7bf3ce624a8ea. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:03Z), 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/DEQS92201041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31769ffa514c19054eb9cc5e51591b4275454c032beee0841a68e6b2db2be147. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:27:45Z), 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/DEQS92201042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550f50e5b7bc99d94d69df1a89c267b5f9477dfd93f9948e81ef2bfba5c8930b. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DEQS92202205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316bdc79f9dbe25859ca6210dc4b82ce8ad1a4b0686102c207c660b40bc4d493. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DELV42300602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b39abb9e3c4c050bd7513067dfc1cc5f70c7f935114a3103566eee7bbcae55. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DELV42300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7057ae797b74e789634151f8fef0388ad5c622efbbcb110672fe2092be8477. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DELV42300605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6760b3cce88ee88b7fe0e9dc57885652bb6f8615675720b021925e991199c40. 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/DELV42300606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dfb3b88ab451220be6515d7acc62b9c4aff5d1d4f66e996f1c73f0ce6ab97. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DELV42300607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71f0a6129db0dbb51ec00991a0b34fc36aee15916e03f6eecfd8cfda840cc10. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DELV42300608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6991620b65e9472264a89344153a0c49a9cc56eb2eda1eef733c15c6640d5d92. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/DELV42300609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4349941d23793c3e6db45aaa04d7e40d645ecd8fe811a6f47210c2b97d459543. 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/DELV42300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd395741380b7d67571f2f978c7416013d3d6919f5ba5e639d25900e2df391089. 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/DELV42300611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee85bd7c126cd84528e8d6997700c2a4ca94a2e60abcc7235e892b7bc8bb890. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DELV42300613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0319c272f5097a9c1c97bc9b7ae8404c0ee3c01d7f85acd44e24b97b62c4bd05. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:54:48Z), 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/DELV42300600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa41981a604a89193efbaddbb7e992faa01fbeed25fd14cf860bb98ea7d00c12. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DELV42300604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f39148b57df7ec865c1f55e8c13093364015c25ec7620dfe24b3ce0e257846. 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/DEA812300532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f39148b57df7ec865c1f55e8c13093364015c25ec7620dfe24b3ce0e257846. 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/DEA812300532.