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 0xbd8644ce7174ad9e6e993dbb428595b3a4a19ef324e4e5e0f0a01f32fb5b9457. 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/79c4086a-211a-4d90-91c8-cb0e6f3568d0.json and https://artists.proofprofile.net/proofs/artist/79c4086a-211a-4d90-91c8-cb0e6f3568d0.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 0x23accaa34a6e94d488fa2750b642311ab60d1053eddb2a2a31fab125b37cc073. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:02:09Z), 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/QZFYX1973099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bfd4e256413c76fb3937335226de692304f5534c216154f82a3b8ef18e87a0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYX1973100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7311984669a1de29c0140a5533589925cd406b225116bee9a02c0b6747f61e49. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZFYX1973102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710c4e04d12b3df0a71853145018beb477e27b90bdada9e919701b95b7bfb0a2. 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/QZFYX1973105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8c1441e599c06a4dda73db3c9291dc34de5bdcaa90f5e4f8ac75b808dfb7ea. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:34:51Z), 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/QZFZ52052971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe806ca6fc63e5237e6ec16b187d2d2d5528201769976c83a1e2f697e441c69b6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:37:08Z), 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/QZK6M2195992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f13b6bac90e2b1d1ed8ccb96c07a830ebefd80216f43ff3f096f93bbda72c2. 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/QZHNC2151289.