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 0xad33e6b8308f99efa32a5d6d72d52e6e4cf7df8b363cec05d055983fafb51081. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74858dc7-f0de-44f6-8eb1-b65d2e0e293e.json and https://artists.proofprofile.net/proofs/artist/74858dc7-f0de-44f6-8eb1-b65d2e0e293e.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 0x5d650cff1b8621ce9f47c22848ca921b5cbe70ee171b94efbf7d56af184ac1d9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:49:31Z), 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/GBLFP2051296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865b7ecc5899878935adc39c707458b7fe946d4b26a26120a8351a718b276270. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN92246346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cb3c27e2579a443a7ed1a81d9bd94ac42251b89a7d4e50c950ce277d71c628. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN92246350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e03917eea5d33e13598be7e51c5d08eaef2347adc4c0acbb0c7147245bd4591. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UKXN22279855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e647a12ace97771e0e560939a5690a34cf73d7e269d7ce5e76c45008e80125. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWZ2357018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb13cbdb23df7821c66a5db578f0759d39beb5b72f19924af1baec9cccd151a1. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZFZ42510475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a18687ade1719d4568f5d76299c5ea1e8db32a662805d5c849aa6e7081ebe9. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QZES72504972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c7ad2116da225a2aad6fde1159ba6c68ca67b55642adda41b79e474839b9d7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:47Z), 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/QZNWX2543555.