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 0xad121ec8a5f481dd280e9dadc49f5b4c522bff1ac62cd4af5f46361b37e0adc0. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e028d81-6ff7-49f6-b5b2-6b1df1932f96.json and https://artists.proofprofile.net/proofs/artist/7e028d81-6ff7-49f6-b5b2-6b1df1932f96.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 0x52234ce20113d242385c4a8e608e20f0f17a2fac20a9e246482ff0bec71fec07. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZWDE2255263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cce587aee8a60ae2e89c37995d9d0d8e3e9606d9d6352cbd4d4e21e86c9356. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:10:03Z), 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/QZZ8B2363448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7690cfb027505fb924260a5ce291308bb794ac92e386e7d87cd6c6efee75544. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:05:46Z), 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/USLZJ2187255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bd4d59bc39e6d3f94afc0b7cf772f3ea5e75a9706b61592df4807db53ec4f5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:20Z), 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/GBWUL2190670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71de9d6f9382a66ffef6220484557067fd5174be1ea882bb339da5832954d861. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:00:50Z), 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/QZWV32443444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe21c43da91c8eb8d60f3b355797d6d2a3adf22fbf441678c2357dd6651fcdf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ8A2413953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8196b9663ac4ae4b44a96d58741b68ced6c1b4fb1a11a2bfbd9d0c35134260db. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZWDD2516483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa083e9472260e1c0aaf870842940a3cc369f019062012f11a1a602e97b91491f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWV32582093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df2e362797b450447bae4620f70c75042b06e25bfd6e8bc7f590a6520dc51bd. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:09:33Z), 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/QZZ8A2532867.