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 0x4c654d26362a775616df5b536da3ab66965f61f08ba728af7813d78af2fb185e. 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/065f39da-2d03-4ee2-9c48-f50caa15a426.json and https://artists.proofprofile.net/proofs/artist/065f39da-2d03-4ee2-9c48-f50caa15a426.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 0xf2b89d43f5bba556d4b09ce77ca6b681c028a64c1b5c75b843f990859268f2a6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES72101839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d988ae41ebaa2bd831c49fef06fb93aaf34c834bb291f163b0ca4645936e5ec. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN32320470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955d7edf46606d99d186cadc7b0bca14ef0f55b055740508244444dc18a17c12. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFE2306422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c79046be4013352167d68056961d205488b78d04066e957000aed6ce86a5632. 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/QZWFJ2381807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae607ce282aba8645b4063709e5340bd307fc2ce47b26950cbc108f66721f08. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:08Z), 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/QZFYZ2414599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f569a730bb736f36eb80e71502fe3dee4dc78d73d799e3796fcca42dc3d9c1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFE2472957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750ce31f8b914f640f270cb0542a87a0b8a3780bc63c9e770e2ce3dd0f9baa20. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZN882541199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a542cbf97d5c5159e1738f406deb1633615e82ff340ed817c7ac8885558e1db. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWT2513266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6a2a0410416b99f7f007d55ef86ebdb7af92b096e84be09d17713f0c874da8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWZ2539891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a542cbf97d5c5159e1738f406deb1633615e82ff340ed817c7ac8885558e1db. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWT2513266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3b9d2f095393972ba655340a95e8cc6914605fc59f229fe309159ba9a83164. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6F2414100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3b9d2f095393972ba655340a95e8cc6914605fc59f229fe309159ba9a83164. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6F2414100.