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 0x52685a1f599e3210e435583b3f0f6651e843640131fc8d8544606c59d7d73de9. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/651ecbe8-3ccb-44be-8b7f-a517e9482733.json and https://artists.proofprofile.net/proofs/artist/651ecbe8-3ccb-44be-8b7f-a517e9482733.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 0xe2f6f6621a076936d1240d95c32d4afc86e013eae181d9fb9e69553ef84d9b91. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:09:22Z), 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/QZTBB2592571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1cc2a8293af9eb5a53297047888d27ca34b2829b9a660ee5d6f040345b4d0e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTBB2592573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45651000ad37f2dfb919e4b324948f8c2db1b1389e9891e2c56e8186e94f2dd0. 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/QZTBB2592577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9d8d464650167712923bb36bc4fd4bb5bdc9cb608fd886487a462caf5d1a22. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:10Z), 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/QZTBB2592578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191d7c401cdb7d5f1c4db14fae6a078fd99979c58a0600dffa805a73927c457a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:41:33Z), 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/QZTBB2592579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e807b0e551c2fe89502f8d051e489f2fa43c47376c3bcd42680c827e1eeb12. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTBD2557616.