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 0x8140bf794bb23b9019e9bf616c60278e410734ec1984a2453978cb14b14d907b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2b2f18b-f234-4ef6-8f56-19939ac2ee0e.json and https://artists.proofprofile.net/proofs/artist/a2b2f18b-f234-4ef6-8f56-19939ac2ee0e.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 0xc2f5339d334c6895964998bdec97baa429ddaf1b8e97b71ddf960a0922ec3485. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:26:17Z), 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/QMFME2181103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c48620f60f738f59eca48d8414ae458377ad6ac5ac0750e0273ddf744df8d8. 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/QMDA62214513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a9964e01800f6b1a6f950c79570a3ac3df5b53b1941d7b80965095d10dd706. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:11Z), 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/QM4TX2327312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0354a46f1386bfd50a684c075e2a3e3c2222bf9bc5b25d127fe350768b4da8c6. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:24:47Z), 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/TCAHO2360467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa38eceeff294b1a608a4b34de03571789872b02cd30355e8eafd167f07965b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:23Z), 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/TCAHS2306580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff2f8af6b88e6eb91f56853618811ea4003e33b2d4bb6066119f534aa57d6d5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIF2454047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5508f555aaae717ede946fe5cdcf3cd514f24e26df759e9c3645650e3ba1075e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJD2474898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019a09b54df64a9c4f83447cea2047f92c995cf589f7d37cc9199bed2df546e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJM2524432.