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 0x56e1cf6d6dc45e847976eed73c996e28e23eb73cf14c31825aa4b90a968bb5c7. 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/c9eec58a-ff7f-47ec-9d71-cde455796c52.json and https://artists.proofprofile.net/proofs/artist/c9eec58a-ff7f-47ec-9d71-cde455796c52.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 0xd7a561c75811edee961a67e41fe8fdb9744f10af1630c4b3971f09297eb509e2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRWLT1100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dedc93a93b0b7bf0d614976a320bfbda3bff97030a34939dc7ecabc6abfa6e. 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/BRWLT1100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8761c40eb91c7cf2ad9fc1196554d4777e18aba5529572f6613926162a7e0d. 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/BRWLT1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e686e39462afe9153be79463644fb739fc052507eaf05fdd1e950b23f132f4e. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/BRWLT1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb344f83da09c2d43d701a0ee056b2a46556ba1f5ffb2f8e32a496eb58457d4f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/BRWLT0300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa941b998d64c2c5075fdadfe28b826de837641b7be56367700a75c8391498bfd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRWLT0300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6d52f4db36c3b45b840a5b764437a5e4420191656243178c5ac2b41a6aa971. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/BRWLT0300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e102dd608b96ac119450fce2d1e61c5bdaac42034f1a11e20ed9ccbefc9bf45. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/BRWLT0300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d170c3bc779eda7ca8c0137fb1fb85b9f2d300eedc6d4e980a4d7fe1412d73b. 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/BRWLT0300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc30350008c838c4ba06e470182ac3a19b08fdee9da78c722cdcb04d4b8ab454. 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/BRWLT1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4743a33b517aa5f9905e3f2ca398f718cb2d9123ff45e4bc6ade556038712. 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/BRWLT1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ee23730536465c7c327229aa10db5bac44e6b16df4722c87cb0ce0c14e00d0. 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/BRWLT1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4b0be24b7e4f0be6c90322b98431ac04018aedebc082fb1b4bf17b403380e1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BRWLT1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019c2875f3bc4f2abd9ce5371c9710666724baaa8602a04079f0579377d9cc87. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/BRWLT1900015.