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 0xab8ede4427e1e50d70192180a5d38f0a13bcc92909755a2f42cc11e0d2efa4c4. 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/188ea4e8-dd35-478c-8552-23e7dd7bba72.json and https://artists.proofprofile.net/proofs/artist/188ea4e8-dd35-478c-8552-23e7dd7bba72.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 0x690e6c346a7dd0fab0071607a1623b04422bef092673b87be21465c6b094b35a. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:19:58Z), 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/USX9P0635411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5913c1b80af7e868a981d31b0cd7481f4af3a9b1315c28970c5329fc3145601. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:20:58Z), 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/USHM20892220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726a62698c56fa786f14e9c8357f3e06646df28db903387f828551f1b8017c70. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM20892224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49607f1f35a09c7559710ff7b7f81c9227b31d90004ad3e366e229e602da8060. 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/QZTRX2310438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e7af872ff1dbc25934de6b30901237273679ed29bd084f7c98600ff75acf0f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZ5FN2428621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd48e29af7849495b98d93d263d6ed6205a4c8864afa3ab6007cd686d1acc40. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBWUL2466812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fec57fe1665547f25ad3ccabdddc68f6722e7d951c55abab66b33c332b0ee4a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ8A2547757.