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 0x61dbcbf0cad2347aa5f73c310d917120392b8feacd185dc7cc300b6d50220563. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/516bdfb3-064c-45fa-9cf9-dc37037977f0.json and https://artists.proofprofile.net/proofs/artist/516bdfb3-064c-45fa-9cf9-dc37037977f0.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 0x1a5ce6dd93a63d46dd7a715b1131dbc8f1aefee4892fcbab74a10e043973f4b0. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QMJPJ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5ce6dd93a63d46dd7a715b1131dbc8f1aefee4892fcbab74a10e043973f4b0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:29:20Z), 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/QMJPJ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea3d07e02fb1f843d098e0b171974c1a34e7f0ddf86a9729d1202aee02c0ddf. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QMJPJ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec45e8bc36ebff04aac76107a49c9c7051908c751be7a6ec858e92a43984379. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMJPJ2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9afee9422323bb06f123a84dfc683cee3a41f1cf462d3c726772ea705c9d71. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMJPJ2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7fdaa3dc1a6cdd6df58b1b7863a7ab887d745685445961e2b5588e613d51fc. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:34:39Z), 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/QMJPJ2500006.