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 0x316397c57d4eb7d807f3afeeb9393ef2224381fd7ed06480bd2cd80f80496bd7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa21b397-2d1a-4635-9c20-85167b163256.json and https://artists.proofprofile.net/proofs/artist/aa21b397-2d1a-4635-9c20-85167b163256.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 0x3b11ce733d19ba01d0ffc6013427e5cfdd8571390cb07c78aad7468dfe3ae332. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:16Z), 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/QZGLS1952843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b77d6891cd965fb46183a333e78c63046f748e42ee0b417dfa558c52473522. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:59:43Z), 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/QZHZ52181976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1faca7b525570be6ea37cfb5b3359b4b0e09a89693c5b69845f31ab2c1bab23. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHZ62123559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2842fa183f138f964ed31280fea5496d8a9aad0f056cd7d55551e6d2339cb88f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZGLS2402315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552eb7fc32cf331566d2dd098d0bee1934262d2c12874a03e1ac0295982dc2ff. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USHM82498033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adf731d386b79f6cb6c4314214a3a9d16e9d9dca677eb8b685bcc783c097318. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNJY2467999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9118b90b24c8f6069d3fb138b2bf8df67d5cb7d2755abe9965b6592036bbe284. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:42:31Z), 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/QZGLS2535871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d2fc777e266a87ccc5607f75a9dc898eff61962cdeff4fbe17cc72779ee74b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:29:30Z), 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/QZNJX2553625.