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 0xe735c02fa1ad7ca546a4cd8e67e30bd595ccd74cc65cee5de7d14ca84218a638. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a060e63-ef06-43e8-b19e-888490b15eac.json and https://artists.proofprofile.net/proofs/artist/5a060e63-ef06-43e8-b19e-888490b15eac.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 0xcd8b802e7b725d8ba11a6dc67669fd9f41fc4536a029c458db3b65678cd4a66c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CA5KR2464237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e607065e517d69e404bddf6c96200dd219285ab550f435b3a8dd68fff37dac. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZHN62408103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576490ccc67bea84dd8466d3afadcccc2c76ac9989129ac001738a4f0ad8875b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CA5KR2464238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ca59ee734bb1e042a58bcb9a742dad685249cc01ae2c56b4019e418b641990. 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/QZMEN2479559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d0d72357fae27b75117eefeab8f244270576c04e70b503bcdabad5538dcd63. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:28:01Z), 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/CA5KR2464239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5177d95d908297353cca7cecd409a44f37b391d92ddcf7dc82af1b4eb64e8f96. 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/CA5KR2464240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca39ce23b9fa0c073d39e831e89b915ed526a06ea40a8055af3a1d9a449b36f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:07:12Z), 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/QZES92457146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d3cde20cb67a72edc87fc5428604ac412b9cee17c56a2bf72f6ccf71342048. 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/CA5KR2464241.