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 0x38b373eefa678fe56ac35df6d490cd471b5b62babf6ee9ddddaad57c0f392f90. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46e7d67e-2c42-4cb8-a173-53a5cb219956.json and https://artists.proofprofile.net/proofs/artist/46e7d67e-2c42-4cb8-a173-53a5cb219956.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 0x5df1794c5d30911596a75aacc7fdf52f261d765e94afe700ef9d3de5c93f3c38. 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/QZNWR2203536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45194a64ccb39799cad38f74e175ff1802619be15b0d57f14be9d4ed8055213. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAU2276402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15288d906961640c742fa25f753a565dface937514e9b22606edb74d1e0d7e4c. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZWFP2304891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946a3921e6f0812afce1c973057f19f202765e8c01eaf5bfa9dd5beeab9bf69a. 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/QZWFP2304894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a776f94b46b1a79ca31dbc193b22a2e96d0d024dff8e68ebb22c001fbe057e. 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/QZFZ32460283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816ebd9de8d8cd7bb9302a309a77a7b2c5b6f971482e31e3785912f459e0d89e. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:50Z), 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/QZWFG2370219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3285877f7d86dc97c4652cbfc9739dcb5ff559d4539b12cb90dfe2b2a8d3e279. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TLVEM2474784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16f165bba745feac39e17686e8e38999444a14e791ca397e50e35f0eba16651. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:30:48Z), 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/TLVEM2474785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66e4879ce4591af4e74a89419fb5f2b758dc4b731203bf260c173d07c7e7a1c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZVEM1800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63bebe57f5c573b005c61208c5c5605abfc79c03ac42bbc7e78307349df7f3f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZVEM1838676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d1f2283e137286f0451e75dc197c3e14f7b05efcd531cba019783a61f76091. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:53:22Z), 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/QZPEW2545941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce77b9c024a8e30c73c9e376cc15eb7eeaba98ff50d0e290d068b50095e9a941. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT4K52538500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbc873ca4301a7cf28f68dc2c2d47352213dd0eb26fab709efda38f2efffc2e. 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/QT4K42511380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6088e0e1e383f8e52851d9bbe622f65011e4f014d4ca8db5169f78ade1e4ef00. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT4K42562993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3b4383415a055cf428f106e68a779498ed03d51a5f3dd3a5d8ba2d43e89152. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT62U2516013.