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 0x0e4ba3bed86c9b1dd7ac2206b79f6c212a9ed93c777b775f07ae853766a90303. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/490f0736-973e-4c51-b9d7-cbb1c6562085.json and https://artists.proofprofile.net/proofs/artist/490f0736-973e-4c51-b9d7-cbb1c6562085.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 0xe000de0baa5227ea340bfb9f6591df973fc147b0228eacb671bb703370616a67. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:32:07Z), 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/QZWFL2417155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150340b4651845d39cd74d7287ac9a88fe92c0ed3e32ad6c5bae44a98483502d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZDA52597857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52e1b80c42f46255fda6525e2dd77ac77b2d975c4a3e92556c8fa18f20d1d45. 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/QZDA52597858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e555301a53f77a9add359e63c8452e3cca9af16383afe4879fcfb5f1b9797f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:31Z), 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/QZFZ22543024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474b6581a68f2c69ef22cfd838ebf50258fcc9efa71872883d8a1cbcb95c1f93. 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/QZDA52597860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ca536996a606d0e27ab89f31e1c544542227578fe6f12d83670dd0f9cf36fc. 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/QZDA52597861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2621a88ef01448007b2a4a63b1703c3e4156ec2ce8bb21d783e9d58e60d968be. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:23:03Z), 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/QZDA52597862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd63b30df893fcce3f31ded1e5bf6064044e3e54256fd579b7377f6d0b8d8dd1. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZDA52597863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af9de7d002f545f1ce5cc8e2af25e3e723983843abd4feeffe2e8e8108ed191. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:04:16Z), 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/QZDA52597864.