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 0xfa89348c1ec9854f30f66a8fdc8d64bf23b9b69f9fa101699225ecb45eb4e9ff. 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/60da508f-8eed-4dc5-9aaa-24a973c3fdc2.json and https://artists.proofprofile.net/proofs/artist/60da508f-8eed-4dc5-9aaa-24a973c3fdc2.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 0x648315470f1cee618181ec2142e924b7ef7a489e5b939d7984df960ac574e6d8. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZGWW1951365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bb2b845070e2e15ed9abebc8261bb7098aa5a9f891197905e849a7898a8322. 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/QZGWX2039514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756a58e22403167d18deffac47c58c419025aa75ff16895b1688040893cb2d1b. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZGWX2066005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136340436043654d19393af0a5827bec54d8c575acd63e79ea379c53b0348578. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZGWX2100963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3583418075418c4c79a0cabdae643abab7d2a0e0160999701ae6c86d8a2b28b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGWX2179263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871cd8670fbe7c77d03491fe44e62647da376509eed8cdd0031c37522ec39098. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZPJ32105199.
I Still Haven't Found What I'm Looking For
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5b15aa739acc43d631e237e17e17c8095ca2f662e544448412a1caea6ff98a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:40:21Z), 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/QZPJ32333507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb27aa81cb63e4e9a35b3e00427c688e2923771a8e6986ba954aea88a5f94dd8. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZPJ32453105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb154377c0e36850193855bf9cc58bd27873a453ea0169cfb53ff933ef83e803d. 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/QZGWX2041956.