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 0x667762e33fe12cbd2c7cca6f3fcc6a43f2610aa89976cba14072f6bae0dd3667. 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/284024d5-bea7-49d0-9601-d0a6bdc04faf.json and https://artists.proofprofile.net/proofs/artist/284024d5-bea7-49d0-9601-d0a6bdc04faf.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 0x86510313dde01a88b5e62681c58bc497dd3a8e546141d5f5a103eb50c25b11fc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:03:32Z), 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/QZ42A2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1520768df123ad331a0cf831fd34f0ef4479d371479a0afa40a6ef76ddd4fb26. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZ42A2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4817f610809d1e2d0320f3d08f5640649e6e41f86264c655fd6d728ba5de1d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZ42A2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d99fa48e754a985973af8689bdd19d900a1f96ef7788217dbd27f8526c5114. 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/QZ42A2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb14587231d6ad7051bbdd11339e7710fec2a34d3f7fbb0c795bdec54c41ca6f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:57:48Z), 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/QZ42A2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47e2e046e69d963f6df3d9540198215f4f367553bdeaa2dae31962343fc9794. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ42A2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45436edfe0b6619f0af1191d647d9767949ac2b3c7fe90e7083b3c6a179cdc13. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ42A2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0609b79afcbe0ba8b79f69298db3ed5d445ade46790b14c06a3838f39c71df0d. 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/QZ42A2100001.