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 0x4e8c010eddd1062b963cd7fe14a20d44c57063eaca70d730425d10654da0e39b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a6ee73e-6d4f-4024-b770-7594bf6a7d3c.json and https://artists.proofprofile.net/proofs/artist/7a6ee73e-6d4f-4024-b770-7594bf6a7d3c.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 0xb276c2dfa31a33fa10ecdeb1d17871be5590d657d68716416af34f9fb5f79d6b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJF2540435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde93cf0149f7f6432cbc0615ffe968c92398c43cf96ef383ba0de93c8228d82. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJF2540439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fd3c6d8e160d3f9caaba84b1c96270021f9dedd769c7f30cdc0ecb4bdd7514. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJF2540443.
I Have Been Loving You Too Long to Stop Now
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e47ba3d76baf9a467c4b11408b76967bc06d891515ff4b0e9e63265c5a5cd74. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJF2540448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab33a5f3bbd1f4237c788af21e0e6f07c4a23674cf040ea40e9d291945d0db1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJF2540460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deb8ba9e9fa3d2bca56930b9c12cbbab4d5a8d8b9619fa374324094d4c7f149. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:02Z), 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/TCAJF2540463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f6ff90433bb0b077a199d294ae6495bf64448b18880ecd5a8b27d08b06884d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:35:02Z), 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/TCAJF2540472.