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 0xacf2eefa594e4ca8f47dff51df4ffa9cd0743e738c1a5f61caf88108ea7c4bcb. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01c363c5-a090-4620-844d-41c6e7d30b06.json and https://artists.proofprofile.net/proofs/artist/01c363c5-a090-4620-844d-41c6e7d30b06.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 0xceaa7ec315aff4677228709e6a932fb7b33104f1e461ac73211fafc155a5b00b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6E52569673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d95069438d0ba01ebf5ef9ba85106cca4c055c2190f0a187f0ecfcf1f6f895. 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/QT6E52569674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f8604719270bbd76d09658a067880ea27bdce4594bd25d6b1a4c6e38c989df. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:14:17Z), 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/QT6E52569675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b587cf1be49a6266384ffa4b485afd69ed06cedeaadf176da8e3ddf01e6ba4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:17:18Z), 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/QT6E52569676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe528e818e94750e2504335db1af65ec04dff229bc5a648d9f84aefe9043532b4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:49:11Z), 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/QT6E52569677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434cad6759d2438596af4c8cb57b3486f1c7674d7cd4a4f27b83f91965c5f6f3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6E52569678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bac7f9090ab02de02e6e420c354d226f75f4d508f579976e49abb41bcd01127. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:33:01Z), 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/QT6E52569679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a081e434799752e493773182e01c563b55205cbee4704dcfed751791a43b691. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QT6E52569680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dc7b573d809ef3246c53f93725b3ff76a43f960d6ee64b093529a5d096089f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT6E52569681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a5ca4bfb58172e20063206cf72685cf2788a37f59c27d93213e78aa712fd26. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6E52569682.