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 0x84892bbe51172d18dc4f75521720f158ab3ba888cf0b53d030a6e87e86dec863. 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/6784c808-649e-45fc-b317-c84ac51af64c.json and https://artists.proofprofile.net/proofs/artist/6784c808-649e-45fc-b317-c84ac51af64c.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 0x523f995243abac69d51a602b8aebac1e95c1a26cf439f07d9afa3860ad1463b7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:37:16Z), 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/TCAGB2202287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c13371f7c8e45f3569dbffa8f2d7b86c44a508e7689fb8baddee5836fccf8e7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:43Z), 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/GBRKQ2250299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c13371f7c8e45f3569dbffa8f2d7b86c44a508e7689fb8baddee5836fccf8e7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:31Z), 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/GBRKQ2250299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d276419aceddc22a20b0828e873e104a8b6a7cb8dedd65594f7e0355c0dde7b. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:04:19Z), 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/QZ5FN2345434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d276419aceddc22a20b0828e873e104a8b6a7cb8dedd65594f7e0355c0dde7b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:36:04Z), 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/QZ5FN2345434.