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 0xc11ec855a47fd9c687111995b9fdeb7da532d08d6342bac3619afb038d81d9b5. 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/7a8559b4-029d-494c-ba5f-5938ddf4f520.json and https://artists.proofprofile.net/proofs/artist/7a8559b4-029d-494c-ba5f-5938ddf4f520.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 0x9254634a38f751fddaabf10e6841f6396c69ca48b416a98def5b215d07e9bb1a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USL4Q2328771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ab289adc137c388821652acb1feae0f1be9f4a5c8d74adf392aa71cfbace89. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZEB2304032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d7f1f762dfad1ed610dc60a91ab93d61deb669b63589c4ff087d3bdded6ae8. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZZEB2304034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc641dcd0fb046d27344e333a81cd21a61b2e1b0bb402e537fa1ddd6177ec7f05. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:36Z), 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/GBLFP2441905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544b2d503f44ee82b8af1239be61bdfdb94a44e5de4758a4dd26d4004cd0ca2c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWDD2495461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7301ff5f2afd2b93c771443072650672ef762841ad6b0eb7b29d3131883b009d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:56Z), 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/QZWDE2489686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f8a90bdc2b031301b9cbd86c395537be9ee3a5a08192438c0d8a11d3004867. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ8A2429364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7967b7a817aef22baf84199fb95c183f66c6a119cc482c9b39d4e1cfa56dc16. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX53U2532072.