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 0xae6d47ac6b698aeea0727337ae7c407ddb5a29f3988afa776a5665413b2a3ee3. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bde7ab09-563d-4c2b-836f-39b6cdb9b974.json and https://artists.proofprofile.net/proofs/artist/bde7ab09-563d-4c2b-836f-39b6cdb9b974.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 0x8573649115725c344ac38af4b68bd11e39927ad8ca1d8dd23acbe66d680910cc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COAGH2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181e2a1f7467298e8077250ad94e13250c493998185a6bb793af0cf9457d8f61. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/COAGH2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8861559e0ff16d462c07df9f933883834853d27700f649f6ce929fbc72d33d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COAGH2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7721d205b9972e3027c55cc246d4fa0ce4e52a03689ff159b74bba914ab439c4. 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/COAGH2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a1f1387e548793e2fd4d66b99f807537d670ef9aebe5aaf1715b83d6b131f6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/COAGH2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9f8bde598e42b6cb03a1526e4545913af9d078da184c7b9493d14e2e49eb6f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/COAGH2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7cdc0212382c14c69a21e6a9105568bfba3f2030aefa0c5442ada42c4d856f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/COAGH2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f51e190eabaf2a633532139fc6fe9b178b19b8ede8f6d82770778fda3bfd98. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/COAGH2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7beb07b4c2795220a32417181c931e110afaac1198adc022fe6dcf7016ee20. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/COAGH2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50d8bcb8b372bc7ba3c9dfa3f7f5bfa64d5d4c3d494312a481e12e196f63b6a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COAGH2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a81a2bce483c7cef975e9aeb0c1103450c170bb4ee6a4460a795ac88529b528. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/COAGH2300010.