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 0x928a8f8244e5460aeafb818c3a75b96b7e5483251149a1490887cd4c75df9510. 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/9f917d66-53cb-467a-87c8-e6935d99c1cd.json and https://artists.proofprofile.net/proofs/artist/9f917d66-53cb-467a-87c8-e6935d99c1cd.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 0x936c0e531cb013b9474c105b14d8d70eace7d3aebd397558b6dba0e2571768df. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BE7KM2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf1b5a9531f58105cd582060b167034bd01544a12ff75e77edefcdb2f65e11a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BE7KM2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda13ec13fda77482ad0ae78fdeb1acf87a6d2fc0b501e7e8295f9133803813a5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BE7KM2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee57badbaf2ff12317444a0a22b1dec2faa79220e3ad480c9eca6b5ffed1015c. 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/BE7KM2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f558e09b8785b8e8d7a5992ddcb91a4f0bb6b2c9b2d3f12bb8d9c1720ed4ec3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BE7KM2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddec5ddad12820c56badc5b6fe6e9c43eb3a932996fad8aab5dac039982b93fc. 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/BE7KM2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa4e90237b312f835c86427af44ebecf3ffbaaff311573afd945f069e4122c3. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/BE7KM2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea33238c499e0474d45dad332a77a61c20ecb789bdc5936176847432c3dfe96. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/BE7KM2300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0472094e7d458133f36007c9171d1379fac233ae0a391b7b9dd005ff6cce8bd1. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/BE7KM2400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8868280b24e847abdb1de8931b3dfada3e568d452fff30ba5f40030b05f5f3. 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/BE7KM2400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623407fccefaf5ce23a26943edba30ba5c0d95f366f309ae7af69f27fc904c12. 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/BE7KM2500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429b5ee43b6658c416554736d1eb90f18bca14897774f699693def147925dd12. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/BE7KM2500168.