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 0xf1b9eab7ac4b8c8865a2304ef3b2d28703e22f95d6cfe8e56856db66259e2b9f. 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/a246fe0e-a5c3-4ad5-a495-d548703f3488.json and https://artists.proofprofile.net/proofs/artist/a246fe0e-a5c3-4ad5-a495-d548703f3488.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 0xcdb97e3cab08003613b4506715d7c2f6951673ec2fac85542913b6c2c26e8bc8. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USHM81526536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785ef75481d5e7d6a38a0d887a788fa33d462fc265ed18a4aab630727d6f8aa3. 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/USHM21804378.
'Til Death Do Us Part: The California Vault
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5106a340f57acc38bb10d03f16797efcd81072f18cfd07cc38f85f4288f2898. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USHM91860223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb966dbe8155c4477ec218e1b161595ce1562a02cca149b59d51d4f3b73905a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USHM91860226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea320567a6cb7ff596444374a18367db4ec922f9a7af16731f3ffa09c39e5214. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM91860227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0ad0cc66c4f1dd6476ad20375a474722c15e9617582f5aafcf48a21d8a0cd9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM91860229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf99939d50c563cd725b51aec2008ee22d86e1eaedf2fc59504eae69e270289. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:32Z), 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/USHM91860230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530a64e548582e5ac768b4faff5e37e59d36c9aebeb14049747b50a40dfd6dba. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:58:35Z), 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/USL4Q2007136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4c0451290263c42a1b27e19b568e07b2aa2185e7caf752250e379b1395767c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:58:15Z), 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/QM6XS2002035.