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 0x288f051a85a64d5cf8e0a16508ad1a06233da226bc07fa17e47c583285b410d8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3bcff86-b521-4059-8c65-0c82f1566021.json and https://artists.proofprofile.net/proofs/artist/b3bcff86-b521-4059-8c65-0c82f1566021.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 0xa8e1fa4da0bee064f8ac611368acbec43ece410ef876b61dd2642d7553e73021. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:56:32Z), 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/TCAJE2508783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cab12a38dc9576ac33c3cb829553e858b2cb8286929f2a4b5be25f25345b16a. 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/TCAJE2508792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3661e9d94801bfc6cb85783734feea8155920dcd3cc78572764aa53cd9aaa5d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:38:03Z), 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/TCAJE2508857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14276285e3091866cb909d6d1d83c0bb95f988f3ada6ef808ccb2c677a4d4b1f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:01:33Z), 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/TCAJE2508862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4261d08aeba8e66562d22176d09590ad1d9f95e074941bdae3df419fc15c11d6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:36:34Z), 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/TCAJE2508865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9469c33549228b29644a72842f6180eae330e7f730c261a886f479df2d465b2d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJE2508871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebd80f72e1f68753ef6a00c2aa0f737326a4e2a4d7386af23a6c95826d4b596. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJE2508889.