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 0x34418361ce92d54a7f2a773a03215579c8753b4117d1f4d02c2eeccde8711a62. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd078239-e9b2-46d6-84fe-e3d6d62d8d13.json and https://artists.proofprofile.net/proofs/artist/dd078239-e9b2-46d6-84fe-e3d6d62d8d13.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 0xc16d2efbfa9af29d46cea708ff72ae9265c459ecc2db56414f40ff650e924084. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:50:43Z), 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/TCAFB2035199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63df9a73b5a46a351c80017b062064ae11e868547731bdd03d0ed57724c7c872. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/IT0832100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8ca30f50f7dc3899dfe15f4338253557fe1ee1e01848ceec028eca903a40e2. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ITOL62200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed04f5969898be501ea46b2cea5d3605adf61292d0e38430bd6d9a96a066a50. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHJ2347641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16d2efbfa9af29d46cea708ff72ae9265c459ecc2db56414f40ff650e924084. 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/TCAFB2035199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bae7fee5a2da203dcd083ee7a91c0a704573a8991227b94ff3d3c9f5fc5044. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IT2G32300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bae7fee5a2da203dcd083ee7a91c0a704573a8991227b94ff3d3c9f5fc5044. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/IT2G32300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb78a89ad35630f74b2eff7e93746a803f989c73bcb98ddc9b107eda0ef3280d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US38Y2401071.