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 0x7e2dba6ed0b526a75aa1b41952cfdf225016615d8a80af7e6722711db214a0d2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9c3c6f8-c833-4e0d-b174-ad4e957e267f.json and https://artists.proofprofile.net/proofs/artist/a9c3c6f8-c833-4e0d-b174-ad4e957e267f.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 0x12ac0e2f64b48feec83520900969de4b2ee3d1a77376a431feb56afbc43951d9. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZNWU2191412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5badc94557a96f7440cdf313a622e897f996bd8dd91a3f25054052706b6477e0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP52255958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4c3069647a51dbb1c548a8a18f27796ca488456333cf77a6299af783de6607. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZFZ72509001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47de2bce81b607a1b564395a3a9bd05fffc67f30a907d4473bcfba54d50fe643. 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/QZFZ72509002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d2aadead33cf8bd2ee399643d46ce97299cbdfb7ea11381e96eb312ca40694. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZFZ72509003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867388bfe049f73eb6b25f36c9824e16c5286b325a3e5fa41efad6017a4a32f0. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:47Z), 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/QZFZ72509005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593736b630c4c8e3a80c52ac5e91a827df2adee675b03473b77f4804deb37f63. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:35Z), 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/QZFZ72509006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c8217a5af32df6620a341025f4834217440b6563be8c17eace4093043b37b6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT3FC2599208.