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 0x6223f8d8a39c16f8e1e18da986132a13b1084e25cfc2128dbff06ef7206484c7. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b16310a4-59aa-4631-a5cb-d17e8f53b2d3.json and https://artists.proofprofile.net/proofs/artist/b16310a4-59aa-4631-a5cb-d17e8f53b2d3.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 0x19ec17f204b43b747854b3d7d7cf5122dc0533525961233f1f39a5fb004e77c8. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:36Z), 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/GX4G52100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13cce7a79af734e25c1142f454066e4869dc5663d52eebe54f23f2cb2f35009. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX4G52100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780f9ff7596777892c0204afb5f3db4d646ba439bd0af2902855322f99bff920. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX4G52100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197bca1ea4921b9a160d280f66be650cde7d9808665e6881f0d02d06263a4048. 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/GX4G52100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ede7f9f07e3af4953c52f79880ee622a56d05bec8f893d526891f8ffce17d56. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:20Z), 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/GX4G52100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2016f6a5c5c8c3e1556ba046ea57d5b74d4ef62f2b54ca7013628405e7099e6a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:07:10Z), 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/GX4G52100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292ade490080001dbc1e57c28324d4fcfa7cff21f3f35b6d75750f962c660b91. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GX4G52100025.