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 0x8af967b4a852e1cff9f172ba82bd3c40bd29b929c4047cbb9430ae566b300f9e. 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/e3fb51ee-0d1b-4c35-aa05-cfc28e7353e6.json and https://artists.proofprofile.net/proofs/artist/e3fb51ee-0d1b-4c35-aa05-cfc28e7353e6.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 0x16424079fad712f60320fab96d04681c224dc2ca41e2560afb1852a43d919662. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPLR2140888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5658b6190c82c7ff990a8824684b4d0004de8ef6d7a148e40107df66bd26c3f0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA52203492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd201fb17b5767f01d22ce639d641db09587c486b7b46f795af0499bd66288897. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA72240112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e7c450c1d86af65939df98284f9d8b41b72e8afba0131ef1b8ea53f4415707. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES62212239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7cd52fa2e18de3c07aa16b9aa44420ba92bd6b42f540c75e09258581d6ee24. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6J2219760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f45c4dbf20f5481e32caeb639dd3bee6fefea5e4415bc7eaf711b4637d4a23. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZNWS2251256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74777e38c50727216b95b1bd5a55b4ee9403f3827398cc44b07f6bb8bd5c67c3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWT2274674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2a89f012c6432d83fb90e46dbf2b19cc3e42c7afd5266afd40d82f81bca303. 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/QZPLS2271287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd583dada2bce86baceef52e03e14dad695be9d15eab8c3adff4b8c96db9dc0. 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/QZTB52288582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47658ec79fa7ccc015ebf2c5d88d7b0fca1ad8b5b68c629b6a6c6887d097c6d0. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZTB72290234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fde143405966f176808ff521a17193f7361690bd7ad9191917591cbe962c8dd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB82248456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8daff2c71c34df5da031f0827d6501e15a34e07afa6b41358ae04f234e78730. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52322607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9dabadb0c4e8dc05e7813c85f0273d03283414955baf9bce3c3560d5a1f169. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:21Z), 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/QZHNC2301738.