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 0xf92188619a4dc823e2094c6997bc8d90366f7b0043e2a9f4e528f4b4c26a69d1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8df6ab63-c577-4523-8fe3-665af07e79fe.json and https://artists.proofprofile.net/proofs/artist/8df6ab63-c577-4523-8fe3-665af07e79fe.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 0x4870ea3b4aecb5d9162820d3a66c4b376cb958b296efade85dc08209779eb913. 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/USDHM1216267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11dfc9398822b541b8d058ff6e361587f5794ca912ff78b8bcfbc84a6f6c314. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDHM1216268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09d8b1e6c858fc272d368f3eae15afcae3d72aa7150b61c2b6b6f44cddb9698. 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/USDHM1216272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837c38722199094d70df0bf4fd0f676b496daf544bf7e80a641b57d47aa281b. 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/USDHM1216273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eb70d65e218a02fadc6ae44ef29597a9a6bb28e456f8829918854b806edef3. 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/USDHM1216275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf421b940a271a7ddabc28d6d2afd1de25e8dcd96347631e9bdfce730d40ec962. 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/USDHM1216276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19bfce31f80a0fa1e6ecd28a2eb5a804a6c66fb820fea900a98cfedf41c1356. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USDHM1216269.
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 0x310e65d1f1f5d76379a29ba15a4e44dd5e687516ad1d97058e6c826d60aaacd8. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USDHM1216270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f59b18204edd3b65e68b98bb4cd8a362449f1e25584d8c6216fee33cfe3373e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USDHM1216271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94dedb3943f7f6fc6fdd1f411fc325f366f75e64164b28b9f5c7bcf1d41aad. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USDHM1216274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fb77e5d11d60bc6848cafc58a93b3d4c9114af79e6475f715524b65e33c82b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEXEN2000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b381fe7a658d2fb27c8b07e0043e9b26c1aeb46dba37e8e23c4c6a6a563a83a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRHYL1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ab44babd10f18a408a6f5952dd992709792a06f7b94fb169c8ae0e231a052. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU3717020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6f6582ed48796649709c04dc6e198d911d7f7ab29937188a131d121883c20d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRHYL1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e88a3de941764b37c724f644472ad120333cbe0d8175ed4616126dbe62ee48. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRHYL1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c47a7c8782d08404940f4f5f7b02a643a759522f20b053d817888584f8c927c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRHYL1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed443d802c01ac8891b299c2548d5e956d780a72c8b3858e24d1bcd292857a5. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:22:45Z), 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/GBSMU3717021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd339505bb710561a4765b6f913c342188904b1069903ee0a4e027baa1c3f9b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRHYL1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a28a4a5c89ccd15bef737d8bfcba61c43e3b555f37dfcbeca61452fd859aa9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRHYL1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fe66b9b6a162bf5b8f1a6e86d84e83dfb004e3912c075ed0c477091f7147b5. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BRHYL1700015.