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 0x091a0404c6001da6bfd359cf246c7ae72ec9e46f838a84c60f3c6ef6a1d0bb33. 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/300b56d6-ba1b-43e2-a6d2-e7f5c61883d4.json and https://artists.proofprofile.net/proofs/artist/300b56d6-ba1b-43e2-a6d2-e7f5c61883d4.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 0xcaa233bd03fcc3ee604133049083a3c25c73b8a12cd9de50be11815d788a8435. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZWFK2423243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe401491c54cdc16ed62e6cb5229a796292368fef0218104d20dbb0a2e17e736. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2571114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2676c0197af344c32b58cb7f84831c9b0458011f73a6fbbb9cb220ca9f883723. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:34Z), 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/QZK6M2550010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acdfc64b425a8057e18824b112732fda4acf24bb90442eb524f4f509ddcc57f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEM2523290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55b11c4f4a33cef1163448704ae5ac32f6c6d75fba52261bf44c6968b58f47c. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZNWW2571723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8940b74677e0c2f381d2bf658ee99ffbb5e58f2f67c954371f7c2f93ab7243d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:09:35Z), 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/QZWFF2548417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dba5225e0d82176e4065184fa60247a28ae27c334c52c0aa9c99f2cb954f0c9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT3F32588225.