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 0xc810c98385ad86b1fbafd323ef8e5f2d6a5dc93c70255ab1a5b662b45b3a5667. 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/9c1d02fd-c8d2-42e3-b3f4-030ee8c9c1b2.json and https://artists.proofprofile.net/proofs/artist/9c1d02fd-c8d2-42e3-b3f4-030ee8c9c1b2.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 0xd0c7e2d1de77f19dee8f6e6402689eca3fcb967fc2951f0e87a7c2258f0de7be. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZEQU2300865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe2526099dc790bc014c6c721062309ad344b5799e657b34319bd1890385094. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZEQU2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61f4c264fc21f79c2f61c910c9684f580b9ed7820360dc9d3ab5bfd97615748. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZEQU2268290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8088d482c945f59a348aba4b68108e904bb55e3fdafb1773d3eefc6916578fd5. 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/QZEQU2267960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869d3e9eb65fdcb66d46cb2da67bf93ef293ee8ba468f0249893b4661ce4c901. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZEQU2246882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c8ae982c9b47bae72240dc10d232c1d2f6a7e49bc5704332a944b91cb4f011. 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/QZEQU2208807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf33ca7a112ce4ea3c87ad97441a344cf271661d5e22087824abbb05b30b6f8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USRN12100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70689fb0b69a523961f3aa9308f6f81ed8ba6313543617e3b362d155e6a8fce8. 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/USRN12100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcbf700752ecd1a9d8465e4cb3437cd5052933f4f692e84c9dc66d2eeeafda7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USRN12000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bc16b3ca38f1d46207a88b4b0958b67882808ad9687498b9a2223941df671f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRN12000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240c74f3c13d35306710075cf51b135e40296fbfb417e66fe84803bdb8119db5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USRN12000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4768b7e1ebcd9be7dfb7608f7cb2781801d2f3018055bb2fe6b263442c6aa3d1. 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/USRN12000169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5afeb3b9b3b4d5c12556026a3fb557b35f7a7ef92aa4ffa4d7757a7848b282. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USRN12000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14becc2c45201700932b5ba56fdde144d145641b2aef83fc10ad6f30e123a5b3. 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/USRN12000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e78d54a5f0c1428afd818c6e4e1ffa33cbad8b294559694291edbc6cb7e9b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USRN12000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec970447066fa309c36912f15fd58e9f6cda33b1cd5402f786c0efbeab23eef. 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/TCAIQ2484634.