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 0x0f0219292b48b20be3e0fd9ecf6677cbf5c646d256bfb3660142b47b35bc72bb. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4bcb511-4322-400a-8670-a5776cc78f2b.json and https://artists.proofprofile.net/proofs/artist/d4bcb511-4322-400a-8670-a5776cc78f2b.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 0xa2ebd98ed63de3be566eafd2d8c63ee90569737d17af53bd5273952f7487193d. 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/QZDA82018891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c455ffed2d2eeebf951b774726f3200a3c1fde30185078ef3b113e807d85d6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZDA82095762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cca56ca9dfef069010f34fcae1d86284a56f5011ebb6f57761377ce14648744. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:32:12Z), 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/QZK6N2224022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64613a83b95bf29d07d1c661be32c2eb8d10fb2ee9eafb395343985d86211cf5. 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/QZHN92279268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300d1303accad028a3bad1296ed28aa5e67c8084ccde70c05ac573db977992b9. 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/QZTB92204861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cf08b09264b3dfe6b14ee5a1fb9b555a206c0da4ae5d1e82e2e325a9d7c880. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZNWT2384238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd512f2a565784d462d4c1b5de55ca05b5513e3f59cb30307f2de49c388ab8775. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:45Z), 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/QZHN72449985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1e3db2ee5512efd5b8459e6117d9d7eb546971fdf09d0bed2bb6375faa80bc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN72449987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcea7a8cfbdc85955fe45a10187ce3019628ddea8d0ec6ca771dbf579f5b0a75. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHN72449988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24056169c660f82d68b6bd05bd82ece71527373f172d452e7789a1746189013e. 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/QZZ7M2433584.