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 0x913992d0126da1c5b62a1256a785109f73833ffa0e8b523473203b1799c9e1b4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ce4d93d-d653-4fc5-b1fb-ec1726d4a2f6.json and https://artists.proofprofile.net/proofs/artist/2ce4d93d-d653-4fc5-b1fb-ec1726d4a2f6.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 0x41698fda0ac922edc1e666e6d00c0e705c76cfbafbd9f6260a98363f066bc2d7. 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/FR6V82607655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2548ec4634b48b6948abaa15b405c6d366958e45ca5ecfc2d59e320bd6369936. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FR6V82607656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049405ae158356aeea10c7ca7a9766f1ac867d48a4b3623342fa1c8af0d73008. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR6V82607657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8476ba1ceb88bd6b75257ece43034114399e5b5ff2918b0589a251b022fd05. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR6V82607658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b15d04efd60d35ba5b38e6b3e0ddaff420f9d20746124d0d98ecbaa2ea630. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6V82607661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81f8ac3184e6bcb947c514f7e39a06ed5c69082b6c2371c674bcc37ee974d09. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6DC1717140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde984436634a1b9177bfe65f8f3fb56740336727377b1f5f8b8e41c4fba965ed. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6DC1717146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13b3995863def4da958c4776e9f2586c38caa82ad86144603107930ca9a7284. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6DC1905824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fac2b7b13e82fb3cebd2de4e8a891f7727f2d143ed08fa3b83028e002c595a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM6DC1905827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac0dcd923b60dfcf2c54e5a6ad03bba640901334fa1d056fa04ca4e082ece4e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/MXD781802927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bf4fadb038a41b0be6f164c3d884aeafcc9f3b20dc1edd8ae00aa0bda15ef9. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/MXD781802928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0304579db60ca93f63abc0e2b59eda199a9559781920eb5bba41b0ec6ff2ebf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXD781802930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2ca43979a5a039de280b6f86de17f680f91e2942f5289f0651017356a79b7f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXD781802931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819371175408181c13e141496923d6b05f833be256691df9fe8a2599eafa3c7c. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/MXD781802932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73991b3de0f0ca6d95578fa98a1c2bc30a6d80286e068c7dab7eab7fb13c9f94. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/MXD781802936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1577a0d9e8b405e5bdb7b8f66c2dc7251e3198965d65c366b27d75e6a0fc3b5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXD781802937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ca49da176cdc421e994b4ff213d2006293b01ec7fccbeb6064ed164cd8bca6. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FRS182145655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eaad0b761f4065cd1b3dbce8a83c813ac38c5c44ad10707d3f46ab6104ab71. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR59R2286443.