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 0xd5eecc1211a3524d06fd48c08844db0feb9b01283959f423a0efa5ea21d61b20. 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/fb1446a3-4753-42a0-9ada-661d30e22c7e.json and https://artists.proofprofile.net/proofs/artist/fb1446a3-4753-42a0-9ada-661d30e22c7e.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 0xac370b5b1109f49cc090cadc42f74f957d423371bbe8a4fb5fd675f621617b5b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:43:57Z), 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/US4QW0937034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0689ad378aa95dd639859990ee23c643b2734954b814621e873bab829a83254c. 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/USSM11200974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143511b36631d179bae5d27a8f5c7ede34923a4f63a94beb1e6d970fd91dbdf5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:40Z), 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/USYP61100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3d4e2432eddad6af5d6b30738c74319d3b751cfef0cdf38529002182a2c21e. 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/USYP61100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e3cdd4537427a5a7818d747d1940ea69a4250ee3eb17b492ebe925e260319d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USSM11201924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1710c537bf958a69188a6917e3f0204a3dfd4223dba3684217faaa7c459d2d7a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:34:45Z), 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/USSM11303266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1710c537bf958a69188a6917e3f0204a3dfd4223dba3684217faaa7c459d2d7a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USSM11303266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca8e3ce1c0a2bf4415457f91df4f9a3ace02fe254284169f1337eaadc097146. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USSM11300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107f0be0d9a0b217b1bed09c362e94dc8fc70fd337d525908e0241143463a5f3. 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/USSM11303270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8432e805628113e813e0942a7ab33c9f4b600274830ff76dcc752218e5d7167f. 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/USSM11303271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce595ace7763b7e39c37b87c9c1e095a175585422e2649d1c5e95cf5cd66aee. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USSM11303533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ec88b5f977996945cdb25c050c7f25aeac64eedc79c261e5744cfd97b53142. 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/USJI11100252.