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 0x1bd16883aee485e72690d23d17b4ea184bbd00ec131c7d8c046c602472727a60. 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/6dcedb59-1fc2-4520-9b1e-1fa412cad814.json and https://artists.proofprofile.net/proofs/artist/6dcedb59-1fc2-4520-9b1e-1fa412cad814.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 0x1c6562a2c54cad98f8326a3089f172f3d21a1d50085acdeb991c1af7c37febaa. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCJPJ1912121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a1200debec3da6126e018a2edbc1453a5b96cefa1ae5778b73aeada73a25e9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPJ1912122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2f73d05d1f0acbe90ef9d6aa23235689894a46311ec82e897d9b17d122a1f4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPJ1912124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0298a80d276996db224afb376f6ab873886d7b2df349d0ca45c04255bcc057. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCJPJ1912125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584c65444737799aeecd913e4ba9530b38ea7246b544e146026337b4ccb1a350. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCJPJ1912128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0298a80d276996db224afb376f6ab873886d7b2df349d0ca45c04255bcc057. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/TCJPJ1912125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584c65444737799aeecd913e4ba9530b38ea7246b544e146026337b4ccb1a350. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:20:58Z), 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/TCJPJ1912128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c8cf2dbeb5cf533cf535736c18d6dbfad478f9a551302efd273990e57aacd9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:07:48Z), 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/TCJPJ1912132.