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 0x4b290699be8437e8fd12edeaa127ce531f84f566619a208d2532caeb6ca4a92b. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/324a4355-c53a-4b14-aad4-7e1a63f6ddf6.json and https://artists.proofprofile.net/proofs/artist/324a4355-c53a-4b14-aad4-7e1a63f6ddf6.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 0xc2b538425cf61de5282ec324ae7278519d90fa46f461ed566bd8cc2b2c173be6. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:53:25Z), 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/TCAJY2544432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de386d0a221d0a8bea504e02925d7b8fb5134007acb22c0d58d02f1678d7afa. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCAJY2597856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea962ab350503762e9242492689161aca2d723525165c8b477d9b67fda5896cf. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:22:33Z), 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/TCAJY2597871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0908f1fbb24f9caf37660a93fd9d1f6731f7c7d9b740df41ccf0b0fae0e1851b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TCAJY2597958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06751536b3dea5be3603b5593c6802edd9906d72878c395c32fb8cefd3038ab6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:21:22Z), 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/TCAJY2597979.