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 0xc04898043e7766a4a5ba69b2b151c5e8f4dcd8125ec3dbd182c401935f0054a1. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e33c9186-fd18-425e-9f07-2c6be0a5016c.json and https://artists.proofprofile.net/proofs/artist/e33c9186-fd18-425e-9f07-2c6be0a5016c.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 0x24cddd1668dceecb9b2bce8dea3b8b97a001595a3fafb514fb525770e54af36c. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:25:44Z), 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/QZNWX2150681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc8ab373799737d851736451c2c2b569c5b26c2556029e137cd0d2d33efbc82. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:55:08Z), 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/IT7LD2201194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff53d1c97a427565b79fb2dbd41334f9ee3bcfb5543742451f6a15c0c4aeb09. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:25:40Z), 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/ITN072300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6864683bb6580fab33b4d2f7792dd8c3b831d5d055c9154a2718dcf3477e3a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN42469443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26e44b913979284846aa8b072c6827e915b96d3c416260578c09de70b46d52f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ITIZH2500010.