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 0x3e4c99e39f42fc8dae6626d20078dfb33318825ad17a8e6a45b197ce629b817a. 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/c76f3841-28fa-4825-ae53-0a90faa60f5c.json and https://artists.proofprofile.net/proofs/artist/c76f3841-28fa-4825-ae53-0a90faa60f5c.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 0x94f20e63f56c2ad8e6faad97676d34b5a89b18e066118d02895b77fddc315cb4. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GBSMU2991041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606d7010996ddcd26c21fa1eb9cc94d503186d3d1d83759070900b3826dd1847. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBSMU2991042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6bf8763d52121776dd9f2f352cea9d61befe0852d2080b768fe260c83a1c43. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GBSMU2991043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b501d46931201bcdbe6b64dfbf627e0f1ed2b799dd26d7f361b85e666bd1de8. 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/GBSMU2991044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8364657a39698e469c354ec98acf0d24c6e97f399d756fdf59c99920163e9775. 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/GBSMU2991045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d2276598120e9a603cee4b30ca666a2580d5f26b6da89d9bc2dbdb06a88fa0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBSMU2991046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5000eba8975c6158137c9cc13c7f6c09702650998bad89fda02a627dfa9d08ce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBSMU6063749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa9203d8f00400c0f90294b47d423b07bce8f91e4e12a7a54445678ddf4d0ed. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBSMU6063751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe798549b8a9cce3d7b81fc9f2339a29b1aa50e29aa49aa9e9713f1e4aab306b7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBSMU6063753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a559327928d476ef2c0c0d72d85afd9ea147a5c72990d64c36d6b20fbcd99c3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBSMU6063754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c713dd86b2a63c8ffadad0a916072d8b4f131770832225e48ac2a63a204fb26. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBSMU6063755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb6c6cf070b27eb59c93414dee0828627adea32eea6d28562ff88f24a868b83. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBSMU6063756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eca22aecc469c2dab8cabb0016e231f9a609daf9f2d61dacb01e36518eac360. 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/GBSMU8709227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb03ebf91448ede99f4ce67474ebe431a622f5af20bc0f048e98d5192338d6b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBSMU8709228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a85ad662760883bc02429cd4bbfb404dcd047382d4fb963a787df2111c317da. 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/GX3HH2594217.