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 0xfa830232997b7452480d866a36b4e5d9235474cd761f38d2c0457ce156d1517e. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67c96d49-7c77-4d53-a015-4c5ca80c2a03.json and https://artists.proofprofile.net/proofs/artist/67c96d49-7c77-4d53-a015-4c5ca80c2a03.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 0x68d4fdb1f30738998daa39d78da4e69d5d47ccd0a3948fc4f82136d242385ad8. 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/FR9W12301651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b22b266168951efa2a82faba93df85d0fdf76291dba375d9e50d7027069379. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US6QR2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf8d6430ec749fbef6864b41a803e992202639a6ce9a9844bdfaff8728da1f7. 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/US6QR2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385b2626ad8ac1c0ab138e7207fbe903453b36a64317fa1a2fa59984e5786236. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51883e4a53c963f3b7c683adff4438191d56591825a86a1a2c7a30a9230a9855. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US6QR2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61601adfaca0ee879783e28c54ddfb5ccbbdc79d66f88bd988c7ebe9ede844b5. 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/US6QR2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f0b90ef3b1f7640f051fbaf314600201e3c68478ecb0e3cb7c6e87fd6b4abf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246c67e8c74ff7db20585a8d4d38078b8cd7de9616355cb4518d589b41cf674a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13024b9a9336f776b77cfeff64d9aad16a0856f12294cf6e3f4d28687167cb90. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US6QR2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12047e0767f604e44dc4c805710bd73b589d57d359b1e953aa68f54b93c2269. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US6QR2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904f288572e9fa3073c50abb21ebe12bf6f8be6993e982385aa73430fcb7c658. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385b2626ad8ac1c0ab138e7207fbe903453b36a64317fa1a2fa59984e5786236. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US6QR2300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc257d5d82d8806bdacc60495ca2d6fd4e03d6bd20f90e274686ad3bdd6ed2a9. 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/US6QR2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8973dd61832feff905bcfca3097dbb9c3d61b4f5854e4db321a7515e05dbaea. 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/US6QR2300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b7510bba4e8b70a1bd7f17d3b53ac54cbe5b74866a0137484b05809ae54544. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US6QR2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ddffd74436a922ca1a98da3519ed57b1573188e7103ccb677fb9fe81e3a1d. 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/US6QR2300098.