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 0x4732ac40f7c4a776bd8e9e8180f566f0edc4c335761f34fe979dd677cf89048b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be0e0f2d-9ca5-4a4d-94bd-26d7c1ff9a60.json and https://artists.proofprofile.net/proofs/artist/be0e0f2d-9ca5-4a4d-94bd-26d7c1ff9a60.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 0x70f2a786d78970b999af4b9e20d1e338ff75204d0c9980bf2eba9a951f60c8ed. 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/FR10S2230594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44778ea92392fa4a9ede9831a1402d19c4ebe856812eb9cabdeac49b6493233. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762264775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b49daaebd050264a8ed26e64f336c680432a11f1fe61727409d5d31498bd0dd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX202341944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c64e0faf61a66ca43e23a60108c5951424a1266d58962f27d7b4ccd6115122. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:26:51Z), 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/DGA062310878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c19a8042c34939807c6b53a1b55f2e5ff41644de881eddacebc1b98119efbd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:02:35Z), 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/QMFME2364830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226425e8b8cebc172952850fb756cbdf4c5b581e6e901da15a5b0688f231683e. 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/QM4TW2414664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8634070ecf1dc722f21046593093b07cccd56d6fde4b867bab323d6f6b18f6. 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/QM4TX2509308.