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 0xc1f635f0dd2707fc35748efbf675c0e7793f3b9eee50dc524d1ba0de377cc9e0. 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/fd160000-6b4d-4f58-a441-3f3794d68c1a.json and https://artists.proofprofile.net/proofs/artist/fd160000-6b4d-4f58-a441-3f3794d68c1a.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 0x0813b6304d12a68b03c487eb1cbd3414191f89ae18d99590a13e0f6ed8f3a62d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/AEA141205105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b768cb8d318df098aca8fac21555475b12185e7def4853b31705ddee93f01f. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/AEA141405970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd9343366bfbcbef91a9518dfbd6604bb0df358aaaa6033fcf2708ef733fe9d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AEA141506951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce34d2bc644e252b754fc29915a56572bef51919225b10660d36b768c9afa3ca. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:41:08Z), 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/AEA141608279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f4c80969ad857ccb5f59c95d99b47da901f5aec7d277b4b065047e2e0fae29. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AEA141708398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b051ed105d9ad9cf4b1ab97eb28ac2f964d519af5ecc5f25c6b23c1364f0bb. 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/AEA141906255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dceb9645d4ea48ff7bc255d59885ae817d4a4b926dc798d3f262aa2a77a1b8b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/AEA142000861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d6da02bbfc1489db114859d722d40c429a403579441e2ae4799f192a86684a. 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/AEA142303771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899f58b9a2df5d4e250c9d5bd95c1faf00e00638b376795113d822ac95430a5a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM72216210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f40a1fc746e8117f74ad66c6151bf3419b02c3dd00ccb6494213f76b0ab6e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72119280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f40a1fc746e8117f74ad66c6151bf3419b02c3dd00ccb6494213f76b0ab6e3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUM72119280.