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 0xccb3097cd54f328fa08983c424a9c82bd96999a5c0961d55bdfa550523fe34b4. 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/2e9f037b-1c38-4c35-8f81-d13e5c5678cc.json and https://artists.proofprofile.net/proofs/artist/2e9f037b-1c38-4c35-8f81-d13e5c5678cc.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 0x4c51e468c5da233f38231c01f22305b4c12e88a89b5716edf9c4e18b51275c6a. 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/DEWE31800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd807cc55984073a80396875176decb1045856438a24171f18f4fa4f72b4bb603. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:08:06Z), 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/DEWE31800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1510fa0c95a6061875f8504644bb9b9cfaa8c3f0d9a4914eb14749d00f4b40a0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEWE31800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a328f108f8935d178a35729be06668543216329c794fe609a94db04fe494f9e. 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/CH7811930858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c206b21c0e7f9b28d8a11e5d2b80eb81016a1fb0e4bcc3aaa68c4260cec4926. 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/DEZC62495921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350fbc250a48daa69899b71235aa95b7285ccac0062b133d0ef3172cfddab1ae. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DEZC62495927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534e12f16e3cdb3ae1a3eaa266c0a99600f5d52e36924c84c1cfd88d5731d2a1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:42:33Z), 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/DEZC62495931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9688dbb95fda91017f539082cbad36ce4e01e3240723ccbffc38ff7d24f9d26. 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/ATGV12100305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0040bef8b67936c53591fb0adcce2e7cb28034e978d7ccc630ab6db10a11266f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEPI82209347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8546f00b570eb1525dd1a4fb63fb137a842f05fdb773d7230f1e4be4215acde6. 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/DEPI82211537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3c9556c5872f0a5fc71dd0c98a5a62bc233c86d82138e5743789b5e6cbd502. 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/CH7812226002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed1307494b5725f13ddda84081c0ef3580ddad4cdbc353dcf8184f1e8e84079. 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/DEPI82211617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1bdd104395a6cb7389a274934d59f74d9374c6f31ee003f758ac765e469b5f. 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/CH7812233304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7638e64b9faffaba037aa48d8b84822b43cdb0c9a6362e757534373d757b9472. 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/CH7812238068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef4e39bce2778fded6956985db4776a7937562c7d7e578fbf94cd66327502ba. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:51:32Z), 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/QZFYZ2449761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af2d51407639aeec36cb6c8df212a23234bb2c7c4f8abab0110da55ff000afa. 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/QZK6L2559197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af2d51407639aeec36cb6c8df212a23234bb2c7c4f8abab0110da55ff000afa. 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/QZK6L2559197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d36df97c8568533ea74a3761de0733b4aff703bb1495af4a1d3e5c4fc4dfa4. 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/QZTBA2518462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe564a23dd1e77b5af2e72da2f89a1dca3b8d45f6c559c4f85f50051ca3163630. 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/QZTBA2518463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefe81aee4085f2391c64135de20ec294cc19bff227e1dbfc2e1516817ab6718. 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/QZTBA2518464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd151a5fdf20e720e041d9301575b682a2bafa69ed6462d1a0ae925ef59228d. 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/QZTBA2518466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919964c34df5510e617c63ca13571e96b03bbfb4fcd9e8611c31b6d4e8a1a8f3. 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/QZTBA2518467.