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 0xaa773f13dda99b66d4ded891b71f424cb818ed76533e248dfafcb4eab4d0d394. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ad831f5-b376-439b-ae47-fcb259fe225c.json and https://artists.proofprofile.net/proofs/artist/9ad831f5-b376-439b-ae47-fcb259fe225c.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 0x4851b2bfd264dd429037b22a8b2fad0e0d227a1b0645067dca5dd2320a18de09. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTAX2364185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7656d8c34beaed7e478ad4abd73adfe65b7b4e1ea0043118fe73df397ad4a4d3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN62476660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b37e3a57c3ae6dac67c323f523c19b4818a3007001d5d2690b24d81a9defef. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6Q2471692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2498a8fa1a38088aab0cd6d5e56255b42983beabcedcf305ce845f20b7e9e38b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:25Z), 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/QZZ7X2498759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1afdad6b940f7c82e8d56d6066c2c6465f89a15c8a3d5b4b3e63284a6b19299. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:09:27Z), 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/QZZ7X2498760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d55777dd655c8c1108642413914d379adeaea91b39194006789a69d293206f9. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:13:08Z), 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/QZZ7X2498763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe719e70196f201a8cfbb2944fa248612d5cde8380810f6afca2fc481b1a43618. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZZ7X2498766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe074d4d6283e26127ce010cebdee281eba6a5ba2371c3e11edf6c74f996ca0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:07:53Z), 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/QZZ7X2498770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1827c0de91a77992954a722c3512794af642f307717326d08a4e53e620805a6b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:04Z), 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/QZK6K2565428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0986facbf945a969e7591803cdbc0ecc1c0b32c56215d1eddf9ef57f5bc4954. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:20Z), 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/QZNWT2507345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e092c5a556260382c33e3237dd158322d59d719e827c57312d3eaa3cbb9c3d. 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/QZTB72519372.