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 0xc204a1a9dc4e537428928cf5831a950f9b5f30bc075dd74519fcf32150e5bb37. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3cfbce6-b424-4f79-ae7e-4ce51189bfa2.json and https://artists.proofprofile.net/proofs/artist/f3cfbce6-b424-4f79-ae7e-4ce51189bfa2.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 0x94a9227d138c19cc2d0f375f2ca83a5e38ddb7bc6f78f5044e2f20b07af69c91. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DEQZ32000641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2e3641822d01a64ba7f0baed220e41014c488d1cb0ac47fcbb5c0752f854bb. 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/DEQZ32000642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e1dea9b27321e279a085483fda2ad54ee2c6f6bb76ad8d40f42ba593370c41. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEQZ32000643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502ff13d8c0275522f1a421d925a6d883e99b8cb9c82bc91b77022908209ecf5. 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/DEQZ32000644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9fabf80ef88897b56917920b37a04cd18409bdf980c66fc862db6588e4294. 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/DEQZ32000645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6564f9cb060ff9b4e1ada7a3d625ed1b4a813042684dfe657b15c79859b9133d. 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/DEQZ32000646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc959747075f4baf131cc0c9170ac5533a228c249706a35409ce73bfc5de977. 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/DEQZ32000647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b88c8a2d2f5739e4f12df662ed7f0bc61f59ea678729075edcb3123a32912b. 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/DEQZ32000648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd724213938fc555dd0802d9587306f443c2b487044c90693d6f9016f3d23d0f7. 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/DEQZ32000649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b8ec1e140c8adcdcbe654eaf50816ba77d2721b6448b04e8bfec78865f6014. 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/DEQZ32000650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0891211f647636803e4a4d5e9af725ef7ad360f89106ad878e8248850594d708. 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/DEQZ32000651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4f09ae48d1e53c665e3b35cc5451b35bf93d20c8133f4b12d355dffe9af9d9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEQZ32000652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb056d4da3f3d928f1ba1556baafc8a8b6c57082beb0ff0950a1a5a6b521ea0c8. 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/DEQZ32000653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262e0180b79cf38f8b11c9c06f33b2bcf0fb8ea72ba5bc4094f4712c7105e6bb. 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/DEQZ32000654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9978dddfd368104bb4999022c65bfc4a71a4dedd8d8881b80637442c47d6e5a2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEQZ32000655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115ca189dd507c6cfe90b7ef584e51050ebaee875cd5849a3fdcd34030e7dff5. 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/DEQZ32100750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fa73912d299a325de236ea1ab27fc00df292fce15027a14e23cefe159ddf43. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEQZ32100752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8165804745d0af0bc69f0260c6be440c618ab8c83ee12920fb122bb6fb25f433. 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/DEQZ32100720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53cfe1e0890ada0e5ad4f9a70de90faa8d077fc4c39133bf790ce2468882987. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEZC62255306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0140360c2af1368d05443e3daa142e309f18cd09f41b483485975adbd73ceaa5. 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/DEZC62255307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f18f20854cdd1c8218636257f078e15d9c80dd56929c9d8d25d41e776d57cf. 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/DEZC62255308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52422e8ac36762430ad89e738291843cc73a5d9014d6946814e479a5607ddfb8. 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/DEZC62255309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdb52dba43d9dd30a2c0e666dc635387c41ccb1c17ebccf5dd4d88ff640cad6. 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/DEZC62255310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbb4e44a89c9f960cf8aed81f750f81c9a61b75678cc3a220a2e69ef18fee5c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZC62255311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ecf3dcc659f181b825265b32094e7d10c9b64ff2f6c5901b6e4eda8a7c69b7. 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/DEZC62255312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de48f9c3f3ecc7dc857d8be1575711c88c29942d14a11ee2d30ecd56de8e606. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEZC62255313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e411f5a4c9416e3d15021a17edef05b5a423d28aec0beade15b57a9b74c2ab. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEZC62255314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f477ea404b5211c03c5842a09787c5c779dfd55acde95dba084420b7fd97c2. 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/DEZC62255315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b38a9025711ee890eab655f6e3092f237a3b03d54db8760f870c0515676db6. 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/DEZC62255316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668be1b489f19313ba9a6a355c1a5eca2d06a3675f17202faaabe195fae5c7ce. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEZC62255317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5960cbecfe0d8982ad107ded1c3832ed8ad1c0c7079a867861b71103841f43. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEQZ31300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf677641c9af26332ebeff1948f64c242b90ae44516e9bdaee61111793278ad1a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEQZ31300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931fa91c7eefe3fad0795881202191691c9d04a0bb54d94cf573512b7cc8d471. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEQZ31300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fa73912d299a325de236ea1ab27fc00df292fce15027a14e23cefe159ddf43. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEQZ32100752.