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 0xc638ce03c050258f80ba6357e6ae2a663be42b265632913c301773a6c3bfd10b. 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/b2fd7d6d-f6bd-48d4-a6bd-86768272ad21.json and https://artists.proofprofile.net/proofs/artist/b2fd7d6d-f6bd-48d4-a6bd-86768272ad21.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 0x59876bb03428d0f4c2d1a014a96e73cc3a6e23621ce28b2785cfd3017f7f305d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/HKH790900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dc06e8e82d5e376fad37aa991111c538376d2ab741261985b39c9f02ed55b1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HKH790900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d44fa4f25364eef268be536662c4bc3d1a39b3dda42f2b08ef9ea549e707b87. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:12Z), 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/HKH790900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a1f4e46de2665a23fa5123b01e16e69aa049e942cee9e41e575944793cdc33. 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/HKH790900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cf5032396c4be72bcfab8c257b2d26405779d388014dd99dcece41a3a0a103. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:23:17Z), 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/HKH191200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053bbf628e2fcee269adc8fc7ce5497ef7ef11b11133fd7b533b06e0bd2c90a8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HKH791200010.