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 0xae310036819953ed25cc8d6480f23a580425564767da33c75be9e880c1ed7f35. 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/eb2cb70e-3644-431e-b4c1-fc6bbab720bb.json and https://artists.proofprofile.net/proofs/artist/eb2cb70e-3644-431e-b4c1-fc6bbab720bb.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 0x5ded71bafc153aafedf28a04bdbbe944677c4384153c9eeedb6e67d41e9743af. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:05:21Z), 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/GBMJG1909534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc54e2cff852ded58e55523f16388bed1431e8ac22c60e18c14b4a4321a087a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/UKZQA2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2161daab0f312808d7bdf28d2ac49a717d36e975fc4f8556af3a09d2c284a1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/UKZQA2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2829a62428009923a07d9284b7950f32a3e39c31918add49ecb13ae6209918. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKZQA2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd06196457a71010be50d59de4fb448ab45130e1d9bd94f87fe8e93b4959b54f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/UKZQA2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc54e2cff852ded58e55523f16388bed1431e8ac22c60e18c14b4a4321a087a. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/UKZQA2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f18dfa25784fbc26badee10779470e05b539fef4e810209c2060a0ef5cba817. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UKZQA2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963ec85d17a0e2f2ee3dc7e17bc72ef9c11c354e783012c6dc1f5e9217d98c90. 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/TCAIE2478836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459e56845d28688f003c3749f3fcc1e8af66bd83cbc8d8740bb4ef68ae728791. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCAIP2452470.