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 0x5056da1eaa83a9699d2e7b808c0f14da83699ba4c30cc7284a2156e464960cfd. 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/a77e71a0-dcd6-4d05-b86e-f4d9782061b3.json and https://artists.proofprofile.net/proofs/artist/a77e71a0-dcd6-4d05-b86e-f4d9782061b3.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 0x54d303debf77406ac9478041f83e332c57f1a946a04baca3112259b2555cf094. 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/DGA0M2304337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41d15c0c5449333eb9b5b3286b00257e48a682bbb5901dd61f3e373ddc12610. 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/DGA0M2304338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a3edf6b543195560d583c709733a8627c52dc104e03b88c355777c224d67a2. 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/DGA0M2304339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20133f7fe45ccf26c9f904e0fcd3fb2f67810742942464aadb125a63428c9957. 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/DGA0M2304340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8b7ddd057c2365a30d9fef4a76072521d2a79278eb36a1e85d47eae336bb79. 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/DGA0M2304341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca7cf525f58e07db25a7055e1a329ba98a309604526e4a2a3ace2a86bebd026. 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/DGA0M2304342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2ec4bc08e737267a8ec5327afeec99b351a5d3751e73b77c31602d6152cd74. 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/DGA0M2304343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a02b50ea31e8f872a8be823cacc727d865cd4ba875f51ae1947488d766fb53f. 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/DGA0M2304344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf0612dec28ae0d4cf6c213fb71e32d1f957a878efe956fbbe3931be32311b4. 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/TWJL12300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97480e883714d54b10f1a6c5869fa6cfd9f5cab583ca054758331ed7a7333aa. 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/TWJL12300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5160d3d7ca0fb31710ae20550aec0701bed8840fc167a1a19a7ed366d2ef8911. 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/TWJL12300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56039d0705b58d22d8ff667f8ec105192d018caef939ecf54a654f4fd7e8228. 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/TWJL12300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba48152d172d00b2fad67fab7da503e501ede5628b6513609b2932d838a8f991. 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/TWJL12300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fac7541ea2db40cc9df9decd8ebede03bf420c73e04b611679e5ec3e43189b. 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/TWJL12300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b005ad26574aacca72b33007323c0814f5459e9d661d51c6307f286dca7fc13. 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/TWJL12300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b7a016d419e3bf9c8fe402bf08e8f15607ca400d28656826b932a0f8b9abe0. 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/TWJL12300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2bd39d6367031b2b110a6471e63abac92f67dddb589369c5da41f59a591e32. 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/TWJL12300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d9ad1e6da22d0c88a1273914d491293ff54db065dc8576adefc385de849923. 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/TWJL12300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7023b19062108d901de024359e99d31b700acf8647d5f4cd9cda97bc7dbdd533. 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/TWJL12300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb28e9ea196362786d4b1eeda2655a1e4348f237b3054cd49187c7e80b96f12. 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/TWJL12200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ab9a3f0a0a9aad9734efaf4e00f18ed3745c84512878e5ff81782fc2f03497. 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/TWJL12200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdd6f32ae3a6a7460858d195bb05a540a729fd400255d6191fc430240d705ca. 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/TWJL12200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae513a0134649cea21f9a32cca09145e021cb6a753b345161f995e53de5fc2f. 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/TWJL12200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25dd937224c3b53e41a08df6744ea7d6f4aaeb762e8725e75ff115cbf7fd45c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWJL12200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a31b2acd7d9c29940a51b52ec6d86266f0f2fb9b16fa7ce9c1a9a0499f5f1f5. 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/TWJL12200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0f2203d169bc1c15a98fca848f25241eab8a1eede4ccbd57f583af9773a651. 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/TWJL12200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b99545601515397e26b8bfcf9aef9e6ef763184a91f94c6f88d3b18b899e00. 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/TWJL12200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a581ca15bb28a1aac7e7ee3796322a89847e14459cc0445577f9f35acf7b47b. 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/TWJL12200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25094a6a6d5a94a8c3bada1fd75c6ae5d19ff386d2fbcc74add0e80330aa2857. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWJL12200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e37df99b525ae528c7f07b3454044461b8aabe483bcc8f511c0fd6e013abf6e. 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/TWJL12200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1cbee8fe9453524868902712bbc60c2103d3c71b5386fe51b1b6f7d8361df4. 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/TWJL12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643e42d2e86b679e3307c318426e79ca44e1c1865b4db2d59383263cffd32f1a. 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/HKG732410199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2bd39d6367031b2b110a6471e63abac92f67dddb589369c5da41f59a591e32. 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/TWJL12300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97480e883714d54b10f1a6c5869fa6cfd9f5cab583ca054758331ed7a7333aa. 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/TWJL12300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b005ad26574aacca72b33007323c0814f5459e9d661d51c6307f286dca7fc13. 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/TWJL12300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc89346a86c38360134cc66e261cc8183d9375d5fec824e50458527bcff76aa. 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/TWJL12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae513a0134649cea21f9a32cca09145e021cb6a753b345161f995e53de5fc2f. 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/TWJL12200001.