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 0xc38a3e635b1078c823f56c927bc9821cfd6e851cf9d13e14b46ae5a70fd5b036. 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/cf3203ef-f2d2-47de-9572-65b2425e9988.json and https://artists.proofprofile.net/proofs/artist/cf3203ef-f2d2-47de-9572-65b2425e9988.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 0x6d8d2774b45452c2dc0d09046bb9bedd20e1cd035c88415f0edf815aa1e80630. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/UKEX32234214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eadd66b2909d3ce2d956a2db19fb60274fcdb680a26ba808a23436c28cd4d47. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/UKEX32234215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652821c33d3140d76501bf720fc08c772942687d94388d90073bb7b05a2c3545. 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/UKEX32234001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b111cb94fc9c21d69ad65e4f2cca9fc64edb1ef83b8e4ca6380da69067c699. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/UKEX32234007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234126e45d1c138cdaadbd3b7e37f77890aa6cf9db9b17a9fe70d47ddccadd73. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/UKEX32234008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6c7a06cb140f28bfb8497a58aca7187e147c8b1ca45026e9a8135f0774d2cb. 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/UKEX32234015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5ad34c246ac324a177f9607118f43f0137b9cb3f05557cfad99b9ccca246cf. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/UKEX32234017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a01ddb2d968a671cff9e5b23033c546a3bafdfa2532585dd4a96c3c5c2c841. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/UKEX32234019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c65b8697f3915e2afbc0ecd21df80ab91866105ef08ba37211d48b40e2b708a. 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/UKEX32234029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca25d5b310db26042e73cb1729f625b801d9f085a20124c3922241547023593. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/UKEX32234040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae477abb6f19ee433376b94a405560a617f89d3a18ae947bef24c805ee1bfefc. 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/UKEX32234043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed0694fc4423b19ee611ced63f340e47713552b5969538938dde87efefac8d. 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/UKEX32225657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4c8d11d65f3a60bb1a39c02fd072c40cef1c681ef2a3854b1a158ecacf811c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKEX32225664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaa58f680e5bde2c389690089ecb386d2c5aad9dbbf8406c282df15161a734b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKEX32320435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1f25ec17945c0e14f1355910675b8794d5a54d0e2b2e0a9c67c73a65af23c. 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/UKEX32320436.