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 0x8c2693086deec72aea38dec7c11d9154d162f7f0bd5f931638ee9dc085132b5e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acfeb52a-1302-4471-81c4-d944748a22b5.json and https://artists.proofprofile.net/proofs/artist/acfeb52a-1302-4471-81c4-d944748a22b5.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 0xeb8c00eee0229761e0541c97510d19ac46ce2c463ed575cfa76aa15b7735080c. 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/QZK6K2452235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b589aa546aced6486858b8dbcd5f320464c8a67bdf772e3b75cd0587c0253af. 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/GBKQU2488944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf0ae517b6f1f8c452c25b15a59919528ac76bfc9fd40e4cd2e254a237b132d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:07Z), 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/DGA0Q2432944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4453226dbab582811e412d12d2542e374cb676c617259844629ad0a739c3609. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:19:30Z), 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/DGA0Q2432945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b318d43bd723593ec5f6e5bb37cbc6b150974505f64f696f496da60585797b1. 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/GBKQU2554916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b5703dd330b8c12b7243baf14b7cde649a40ed4ae5442b39da94cf3c65de62. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBKQU2554917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaead73b4c338b7ff1427582127198ebc48f00e87a3782fa4b669a84f5462a99b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:09:32Z), 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/GBKQU2588791.