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 0xa3c1b8159ea12bcabe1b9cce1ff0da9fae27ecbdc18395f4efa1a8d5c515aa51. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f21fff11-0312-475f-9049-72cd29e05dc3.json and https://artists.proofprofile.net/proofs/artist/f21fff11-0312-475f-9049-72cd29e05dc3.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 0xc1c0f729d9a3ffee02be4cd2ff4abf9cfb9f6f7a8ce8891c6a7456101558ba0f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USLZJ1530204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71e84fa0efbf6bf5748971cd5f04cc78757e018cce405fe14f7666a617d832c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USLZJ1637228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5da8851499a92e126bd88874a31678ed35a7890a77436a7861512bf6b3f395. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ1637230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b3468274b8853d37fdbf4af8343cd5c4076298bae404f1c1b35cc38051fa31. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USLZJ1637232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2f5035ebf1510d75597aa5223953a992a3270e8815dc07bf0b115e84b72bc9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ1637233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95848220d2391d9056fc7f40e8abbadad47cc03b967b7528fbf441b3787ed0a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ1637234.
Circadoian Rhythms - Zebbler Encanti Experience Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9569e090f2e6a3a9d24adda5edb352267a2cab35a058b6bfdb05385f9d26ed08. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ1637236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda07888d2b851312f000985aec4fb8b27f667f508d1498cfd89454030d18090c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USLZJ1637409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c4653d6ffcbf3758d02a4203b7d5dbc485ac655d58e352381bc24d6b46f90. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USLZJ1637411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bff2543bc8c665abab8b1a21aecb6a19ec849bd55233ce87c482a699b7bf691. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ1637415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989ab7e4cfbc3f879a94b52fe36233b38e36f6dd5c717ead1aafb375d50db1d5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBTDG1301644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ce64372da3ba53bafb56fb06d8980d084efdcd5e3546c337c99388ed779284. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBTDG1301518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6973ba8b3436393513a5755a8dc05d2efda58244000e0d350e8dfd25168f1c14. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBTDG1301366.