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 0x08af5198afc016743b10d7e6ccf0fa55b7281ded80a2521d38902aa4dfa1a112. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a986f456-2dbf-406c-b0f1-79da39bd33fa.json and https://artists.proofprofile.net/proofs/artist/a986f456-2dbf-406c-b0f1-79da39bd33fa.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 0x3fe3001e8466cf37ffd9001288d1c10d6ceea529272eaa9a2c14f5228d1e77c6. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEN982141872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c7b996d23f6393a702dfda0c0d46d59b6bbc47dd6e6a39fc36d4f387b740a3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:41:55Z), 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/DEN982141874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b1520bc91d0e7a661b712622e2a75df721ec744b3ca3813cb2a11fa7411b6e. 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/DEN982141875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6887a75a26c8c938f61d400ad589b2fe77971316e17d1bfc56c84c8bcce56119. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:30:18Z), 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/DEN982141877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ba0e523c958282af569362355dda41ee375dd25779252c9769925fad21990b. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEN982141878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e59daa38b0a3c52e13d5d3dea1e33e08144f6e972687a4c782bc62bd6e71832. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEN982141881.