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 0xd59d7bd228ab9351996e40ccd0652ada957f05d9b5b7e8d58271706c22e461ce. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cb78b19-310d-49f8-bc01-da35a8917026.json and https://artists.proofprofile.net/proofs/artist/7cb78b19-310d-49f8-bc01-da35a8917026.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 0x83d9b3ff912666f9b0e7be9ed85c21d79add401c8f76de7784cf33700db77f37. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPR2271509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a202264ce55bd5619ce63f8de81e0344e1c0d5960a7bf697026eb084bbacdc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPU2224208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a202264ce55bd5619ce63f8de81e0344e1c0d5960a7bf697026eb084bbacdc. 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/TCJPU2224208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8578870934686ae704367ae8cb3984dad5669efe0986a9f287fe1337e2517291. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:21:56Z), 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/TCJPY2476871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a67d49b0403910a7a66fa651a35b6405cb7aed1358387921ac61b272a227a65. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:58:02Z), 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/TCJPY2310284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cf13d7a27c59f0d119795b92e0aca79c7f1d83876a9e4067f39f127a67bc7a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCJPZ2445565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fecb54684c199eb242d2129023102b25ab552977ae2556afeb5ac075618a5ca. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPS2284659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e246bbdfb1c6816075941f3ce86d1117ba90c7387435c208b89f8e5bb729aa9. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPA2479798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c6e6f50fc488768b9a227075d6a2f007d5393cab271943bdcff66486114438. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPB2431589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c76fd2323357b131b5b9cbbcff9603f34bd85c5fdfa571a392ed0c477e2b837. 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/TCJPD2536706.