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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5815be529c6aa3ab12101f0235609d348b237ef28b476d7ad37b0fa2d95f49bb. 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/0d095635-d18e-4d3d-ae87-c2467b40902c.json and https://artists.proofprofile.net/proofs/artist/0d095635-d18e-4d3d-ae87-c2467b40902c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ae4f30cf3a19d2f4b333dd22c846395893328082f96d462b90e884801f084b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/KRZ291820709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b6db39460d15c04b1ea32aeb481423830655a69546845f54b0868c3ed182fc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:34:45Z), 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/KRZ291820710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa197f46db28421802211532284980692a5da790f97ae3685421e436b8d4145. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/KRZ291820711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7513464b15cb0c7ac0d6b1f2457d30e9206ec8e42a180ae9b0ecc290693b057. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:05:38Z), 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/KRZ291820712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad16c389220ac01d95bcf78ebf45b0fd4870876ed6788c3a9c5705327ce03087. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:32:23Z), 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/KRZ291820713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34acb8dd490081c0dfaffd75ae6d596b6abaef95998027d0e1e3581799911a49. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/KRZ291820716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7867e13c25b96e638d8780ceef3f7bb70387132b9b822d0d0c301a1d179cd3ac. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/KRZ291820717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842b3cf5386fbc5e79f5880adb93d0af87d80600aaa8289a6b3412d4532b233d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/KRZ291820718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919f2f87f179838b173a75ee3e4c23a7af2da339a116b53c4f37b68fb297987b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/KRZ291820719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc886c9e11861ad36fc6aee7d50bc73f981635884a99b776487c48f517d264347. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/KRZ291820721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82aaabd26f09da5336a6c558053ce926f5095e3d2b40055727f5acf1f4723bd8. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/KRMIM1913106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe512156d4be150b15864cdfb3c2c8bebb6d194124aa02dbd9b5e0a286aa1e238. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/KRMIM2337566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d800e54cb43541bb6612b4253329ffc61864ff78a6ff6231e24dda078ce7064. 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/KRA381903243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37777d4758d8f8b52242fb5755ad2d2eb8acf57e415f139cd21d96667d1129ba. 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/KRA382103038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c8b5720129a2ab93cd1f0f7a23389b21f44dee51fc45f60f45716f82fda54e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/KRMIM2108507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215bacd56969253048da7ac6117d9866b36649850a70c7e3d999e7053885cd11. 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/KRC711900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4665a9ff7c677f34e31ed11ba73a0413ece70735f6057cd6098a5d5bdd7b23cc. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/KRMIM2445893.
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