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 0x92438c153ad2f8cfd8cca632eb50e3342ba17f5ff490d6688dc3516371d12226. 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/7404c0d4-1e79-4f98-b13a-d8705c966ebb.json and https://artists.proofprofile.net/proofs/artist/7404c0d4-1e79-4f98-b13a-d8705c966ebb.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 0xa594000500244e72535adca69106883619eb6a03a0fb55590f3340a2ba886d76. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/ITZV21400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21281a711bcc108e4944331795645f39f7c0316c1e41c10a68e068520a5642d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/ITZV21600242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb811221ca7c10e3295828116172d527e60ee06c18ca2f4a3589fe59ded2de3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITZV21600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051cd4b803145abf5775896bcaaafa704898bc72270158e1744277c0d45e55e7. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:54:18Z), 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/ITZV21600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a39f66b89082254916b68b55df382fb1590cee569288594580c17491afe59b. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/ITZV21600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1568add1333e572bc08015ace437c80b3a6c96f7a867f8c67cb24adb4c597f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:22:36Z), 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/ITZV21600243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd830baa2358038976f11079c82b1f5092e70151a7a8a648b0263660dd4533a7. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:07:22Z), 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/ITZV22500019.