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 0x2b19bea71bb6c7c803c3db35d4b2722004880c581b505937438ed9294ad73f38. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a1a873a-d1d3-45fd-a98b-2642ecd6eaf1.json and https://artists.proofprofile.net/proofs/artist/8a1a873a-d1d3-45fd-a98b-2642ecd6eaf1.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 0x4a52379fa187a044d8243d92e358044f1812fe0f71eeca7777c2eec4ad8f7d7e. 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/QZTB22344003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4014c2fcd90b9be3e42e542f15b6d7e6fdaef85ccc89caf8604580b6b5b8c913. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTB82306203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936c37945367ee51af3d3e5e73c72d1f84dfafae173fc8e6b4c068806cc7dc12. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:49Z), 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/QZWFK2361566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f9c41e20d54626562d89c4db62317a7d514e7a35b4eeefb84aa7098f48fb26. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWFQ2351605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065f99d1918be5d42fa815312de51ed19cf043f9ab28b60cb7376e5c516c437e. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZFZ72470044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b07116f0cccff255b6580f80f18023933614495f88f2ba56b138d3519ab1d8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:23:35Z), 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/QZDA72418621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdcb5f4d73a9a4ce94afb7541d13138acf28cacebada55fed191c7e6cd41bb0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES72462921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbeb4d1628565c7207eac90319fbce02943932e8bf3124115d71cbe4a3579d8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWV2467256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52341f7d844115d84c5ca0147d14bd497de4f3b6835e7e7cad748faab4317846. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFK2440466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4350e754bd7b24e6858b5f6a5ff07a1a1f88ebec1cf1f575d43fb671bd39bd5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ62550484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014cd315ab044cdc1047e2008ab4cf89d9e1e3967affcf607a8ab1105afc8baa. 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/QZHNA2530280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311e166e33b83fb733423766f8c003167d6a2dbb8f8eae691eee2167946368ea. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZK6J2554876.