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 0xaab4ce4236e3168b25c521b46b4b3a3244d96b8ef9d543ef32011cf078c260b6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82c1d950-5783-44de-bcb3-4d14098ccc58.json and https://artists.proofprofile.net/proofs/artist/82c1d950-5783-44de-bcb3-4d14098ccc58.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 0x09f1079543ba76d1ec1a504ed1614d6278bf81745e97560fc9cbb6526e1398fd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:00Z), 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/UST8K1784871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae69614cbb6a0216d1e5e77e6675d19123e432d4c626f3f8704420f06836aaa7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA71967373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda99c488b6c8619f12c58a290e82cf858e201b51fadb1a4ae7dea8b3ff26d92f. 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/QZHNC1934189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b22f66432bb702c49d5ec8dd4ee14cfd8fff0824f24c518c1a8370c1f5db64c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNWS2145623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7432ffccad4c7044107dda16836f7b91a89043dff0c677e6d1f324ae47bdaeaa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWS2145625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea40393816f45f43396bdb76540afd608ad8708af2434f92b33ef505bcac068. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWS2145626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b38736aab4d34c04f047ddf8327c17a78ad2c464c1c565c667a454b43ee3c39. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:10Z), 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/QZMEN2303869.