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 0x6c45f4e5c5d340631ed1577c991bfc0ca2aecce736f82975705df7204292ee2c. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbec27ef-9910-47d6-9898-12e8c6f6aee9.json and https://artists.proofprofile.net/proofs/artist/fbec27ef-9910-47d6-9898-12e8c6f6aee9.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 0x77fa21b678742a7abccd484274f32f0586a82510b96e6451eb4fd7ba1f7f7596. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:46:38Z), 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/QZNWX2230853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15ce8da92224d490198232792adf777dd4e0a2c4d58a776db6510deafaed44b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES92315905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a95ba96ac4eeae33f8a615f502ec81224ef7a5afa37d28230fc324ffbc2c6d. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:37Z), 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/QZES92315906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9747e4646237bbf3dd2c226fbc00ddef277b3f3b25d453729c36130e1ed19063. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWQ2315198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0484c98d2c1d431e6f0decb232996c491b3a6039d4bd118c97ff002afe63d710. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWY2406941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cde7a04dbbf8c4e1c6f3e4211bf46442ebe20799c3d0f1ccf85e89e09b43b7b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZNWY2406942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc5c0ddc309c33996acb06a4943c07e4085f5549c694976d743b60ec4b020b3. 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/FR9W12468050.