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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c214f7751fc77ded8b90494e1d8f74cd921957388cf2e2accfc5a7ac13f1516. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da9f9393-b5b0-4a4f-a119-8e8c0c585c02.json and https://artists.proofprofile.net/proofs/artist/da9f9393-b5b0-4a4f-a119-8e8c0c585c02.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df581644222da6f5a275d4d88ea2dd57d0979973d68524023b9b2f855bc2b98. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USDYP0810922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010716cd2e697c6a3df1b1ad918b76b22345c2baac5ffbd5aaa3c29610617d4b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDYP0810923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb115ddcb6d69e7a365a0a5e346baf20dcaff418589e9cb76f513f98ddc7e819f. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USDYP0810924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8250a0b51d4fbb30ec31d457117b88f89de5236fc10abc291ea3ac9c1c76ef. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USDYP0810925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fcc53da1c73791915efeccc5e1aad8f49ae0a310ecf3e70596225d5b5960e1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USDYP0810926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955ed83e33e234b2c486d5772eb62fc9ee61ee86154093a08e764bbd8c5ca648. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDYP0810927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1012de9ef175af55a468331204cc00e47b5221cc9a937334c6f058b8e11ca23f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDYP0810929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16055fd6989c1b7fe01099a6257d0aad71407e8c3946ffdf8a19470673d6c29. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USDYP0810930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392e8efe5759818061f9a4d15417aa60db07dd1bd0bac5357bc136e982d4b89d. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USDYP0810931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d3cce88ddbc5ef403293a32a2382646d999b35c46eeedd1ba0c9abe97184fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US8450510083.
Mob Star - Million Dollar Remix Series, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46729ba03dc049b58c9be56fe373f962fe3b9d5d222bb0e04bff0b36c1465b58. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUYG1062110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab84566496a59f0a4b5c9bfe59d28461e7363a3e69478e9bc190d82718cd2563. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USQY50901267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888bfc456c6ade1e2e855063d0ad729be492e22edf5c11a2cc23ecfee0e3385c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USQY50901274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bb9e396860e830736ab9e3d3f6be1339510865d23bae13fef6f5843691f290. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USBAE1301562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc28b52a14e56b2aef8989db012722f769990f69a717b5162635775d7e847de. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USDYP0710386.