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 0x0618b1f8249878cc7e57d45308fa504198bfe93b5cb29b628465507c6c0733d1. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99c7f51f-a72f-4f50-a7de-9a1a63c33ba2.json and https://artists.proofprofile.net/proofs/artist/99c7f51f-a72f-4f50-a7de-9a1a63c33ba2.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 0x09f05bbf1b285e2a2f1f5fa9de3dcc95aa3341ca18e11f726f4d5604304bed68. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:06:34Z), 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/TCAEP2081721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ebcabe0581389df80f210f58e5de77c97dc82fed082f9d52644a4e09b15edf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAEP2081722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfa73d1ab1acc6c71fdee9a3079b9178de065a357eab81cdc3b57d502f0aab5. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:55:33Z), 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/QZNWS2127775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222c4995bc8997e0b36826b77761d6bf64d3d5c8d02e22ee270498e135a067f8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:57:52Z), 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/QZK6L2548359.