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 0xb0f39f43e013033e446dd46da5c221ba46ce6f9a8e940320e1c9425622a95149. 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/d52cb7da-f959-4691-a88f-dc7b4b216f3d.json and https://artists.proofprofile.net/proofs/artist/d52cb7da-f959-4691-a88f-dc7b4b216f3d.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 0xcc05757d345259f52c595d0504baea775d8d7bfa5c64a83b63c1640c4a403233. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USCGJ1901065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb736e6aa566ec71c56d1e2033f1daa3e8702ebf3e49ddbe7aac5851dba6cf1b5. 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/USCGJ1959361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8146fc81a5a13ef0440cff4fc40b2b74ff62fe1d45d90dc119191312436d6ca. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USCGJ1989770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c678aee7af01163310a313d402278f4033c9fac6b581b9f4866ae89a337a63. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:00:10Z), 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/USCGH2023367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18073c213b8e9489fd9fd3ca9e6f76abd378f98b67aa8db99794d4ced9cb638. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:53:37Z), 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/USCGJ2131200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205c12a80b007d1da9d5c0ba1c176286cd77d2aaa14addec301804d6dba35a2a. 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/USL4Q2180978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675ae0d9912d8e5804418f2fc251765b37065a0bf9da9d4a4d887e15309183e0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USX9P2301027.