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 0x2be5d35a6f76ab8bbf75fbed26670bf06993eaa4cc00fb902350743fb5d0f299. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fab19b61-e96c-4096-b897-e7f58f5cd40e.json and https://artists.proofprofile.net/proofs/artist/fab19b61-e96c-4096-b897-e7f58f5cd40e.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 0x49b5b2a5bfa487dc060d5b918eba5b93974ee7c222c2c7a22218edd66a7ec855. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWDE2384310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae857a9f3ea0b9c9a7c6bbfdde580571ca3d262b31276d1058a1f0090fc1224. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3F72555570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a12cd6977d48f9e7eb03eda83af85e035a2200af0e9977da263b55a7c2e744. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QT3F72557536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a48e9bd286e0d00a9639e9a95e547bed08e0b35a8d0ea4c4a44715cb1c7f603. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QT3F72557547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484686b3d326d9fa2257dfbf9d3a379c9e24c770e8a226d794812b7382f37711. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QT3F72555581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa309c61c69fddb1d4c580fea3d79bd9971e2dbe8d0c3b9a1b3ab80224fedaf1a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F72555598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cc77018e089978300892517382d82451357885640bb1454fb14e694a4c6633. 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/QT3F92527738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1c11d13dd192b729f7f09b9cd050ec6bb11e99be6052071254211f1990c0b3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3F92527790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d056b5646d30a267d38afc4e3f27b2b83a4c9a4f62db081e1152347f52e06f8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F92527787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc889ef2b1c9cc4307bbd59d8351af00cd783f7c322fd71c50635f1942b887e8. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QT3F92527785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c4c071e74632a97f7d48c9613ad7d70ac5151f0465dfae53a9f4b4229d6be. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3F92527642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b43de1c0f6f999430b30c60d3a015140f245ffb267a0f424a077d4837d52c2. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT3F92527786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7adbc7f2ff3557218aad7ef9d5327b62e6aac664fd26907eb3a05960f9ff0c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3F92527784.