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 0xf3a888d0a5b206eccde3aaa892fd5a99dcea186075732068c11868915269ca5b. 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/e54a441c-5a9d-4ef5-914f-da65283bde9d.json and https://artists.proofprofile.net/proofs/artist/e54a441c-5a9d-4ef5-914f-da65283bde9d.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 0x09c06f33d18d9aace97c658b6a9fac5fbde87b6bfe8db408f016c5444b0cc7a9. 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/TCAHC2351996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80584a653fe5555ccf6129658bae1a76f0077f74c69ca63101f0fcff3675f2f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHE2351227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50a5e3fb4b9b9f5540091143a2b3e6f017506585e62191afc880493f40b1edc. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:17Z), 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/TCAHE2351256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ba93832ddd6636d81fdc47503564cfb0ffe9fcaf5a839d4fdc1b534ea97719. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAHK2342929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dba7132fd6f92d70ddfcf2dc24319064350f608480fbd0cc626bf071f36688d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:32Z), 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/TCAHM2334843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032aecea25ede882a1524fa922385949e645c7354b86a8247c28b714ce6b1f2a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHW2411632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02826b0208f8ae4dcac6aadac0f1deecad6e330140d0252f06cfe1deb5310884. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAHZ2485054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b95de8101dd140c86f456030e7cf4bd03ffd816c2e53f8546d7fdb1657c54d4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:22:29Z), 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/TCAJA2414620.