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 0x7aef17893e5f9e64cc9aa4146e2a6725d0252a465b3b98f2a9b2c187d6c4a96a. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bc86247-c703-41e6-b205-206c079bd6b1.json and https://artists.proofprofile.net/proofs/artist/7bc86247-c703-41e6-b205-206c079bd6b1.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 0xf48a8ee393e541f5f4562522714108ef5ae0269b2d88aff63cf97a29b2a88a50. 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/SE6XX2104872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cb54407c907fda3b6db96c9ba95d7cb62cbd69704c8ac80c3a0070f3ddabf5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE6HN2288521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb3f452847e4a2bac5429fbf2e2b28db9a7a3f787caa3faa12f4ec896a4c11a. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/SE6XX2292165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195a2e002668e20d9bda9183dd5573c704e209fa3df829bd461f281507e71838. 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/USUYG1587956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77361f598696a3efd27c50134fd4c441dae1d8a851f7bd40057af3b5d67f4dd6. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:30:40Z), 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/USUYG1755537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1a14876b893d160f1d9a604edc904ac43aeb5b7447ff53263f2dbc8cdef670. 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/USUYG1755541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373a03f4bf631f9aec9177ade6d9e04d58f850f335c9ddf0250bbe292555f11a. 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/USUYG1755543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285c6ab24eb67367e17322f27c2c140a1f5602a2730adf720908cd84472500b6. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:12Z), 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/USUYG1755560.