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 0x09556e59963476ab3bffaa71681aea162cb4f80fe17fa6fe9cc35f241a89fe29. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c5cf156-828f-459b-bc2a-ce8c94fa8b82.json and https://artists.proofprofile.net/proofs/artist/5c5cf156-828f-459b-bc2a-ce8c94fa8b82.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 0xfd15fb1358d10ebf2ffc7923816d0e574cf0d57c5cc83eb0e2fcec9aa8cfa8ea. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:51Z), 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/TCAJF2538312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6181455d3240ed73fca5294cb693189659ab9f27d7b662a83c615fe5b413e5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:34Z), 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/TCAJF2538314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0665cb36caa9887f150caa3c4f38d87398fcd8d2452b8087738808b95d9e0ae2. 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/TCAJF2538317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2940b2bf8a19a5452eadd2594c391ba871be45b02014a7046c24190ab5b7b403. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCAJF2538323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10acf5b201014e7150b2891958ab064d3c004fde82b9e6d676b4299009b837aa. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:26:11Z), 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/TCAJF2538326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f9196fa853b01f266f354af4fd58613d7d5b6f65b8b1c2967ff0a0b4fcf23f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJF2538328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f06bfa11d0beac69478206bd517238d3125c07f53f3578f92a2548e398a7aac. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJF2538329.