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 0xdea454c410d49838958345baebfe182e079fa030e20ad8d7bd4582b599207c18. 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/2911e037-be3b-41ec-aef6-57409c381f62.json and https://artists.proofprofile.net/proofs/artist/2911e037-be3b-41ec-aef6-57409c381f62.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 0xb3d3c8267b6c01ac7a9f15ebba3ddaa5adda36da953ce983e8b127de5babb74e. 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/QZWFR2315172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b72dc610e170db5ee4f810c7a5d69e1992f07198321d5bd79728e45fed95af. 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/QZFZ22407719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a4868bf9c5cf6e3d49a959dc5ee9cc60927cf6e1dd13d6295b18c152f48dc2. 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/QZFZ32433134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4b5a2b09cd4cd4750f87d8246a26db0075b6799df54596d45e709cbf01bc5f. 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/QZES52484337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf178d29112c8e7e2371db596c64852b78515c1232bd18e55c1b8d92cc9bfad34. 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/QZES52484338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1714df545a07eef31c33c146df6496ef1417158c112b78426a072aee308e83. 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/QZFZ32430985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc7f88631da77b35b862a7c1180e0b69b8204f829803022ecc1fcea7ab5aa4e. 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/QZLBC2400737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe8cad7d702ccad8cc2dbb144e04160d4ad0e51bfb697cef68fd5a5a4fa7d2b. 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/QZHNA2199262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325d2cc1fc9e2b6e61123476a1c11e6cb76464cdaeb33a8bde560bed74c7ddb8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWZ2043977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469ab120974c24215d275c2da4473812a685ba529c4298111873019becc0128d. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QM4TX2041966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8ea8d78be25210b9d74978899be12cc9cac40d822f2061663e9f0a755996f9. 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/QM4TX2041967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166816fdbd3ebf344cd3525090f2802dcada7e0fc28030c64a51b7bb216c9233. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TX2041973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f61fdc02f738dd634de0c1766296c631e8b241fb4abf3abf69bbc875769ad21. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX2041977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ce911c1f525a6c7852390f6f182da82a1ba7787cdd3e0ee78451ee5bbaa31f. 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/QM4TX2041993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba394ec8cb5706c593dc4b7aeae5878350ec70d94d6f7d2e54bbbbd30cef5d2. 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/QZES52255523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bb5bdd0a54b2d9c408bfedb1f89fa7d962294ac076d07d39c9fbc74a9c7080. 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/QZES52237046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85afa6f45687a95203550ae43fac236a9722d4593d037ae8f230be29ea615bc7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6N22099642.