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 0x2213ea66b92dbca41b18da83289f0ca4e7195f800252d9e32cac676359100639. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bd79359-515a-428b-9156-6fcfa31426d7.json and https://artists.proofprofile.net/proofs/artist/5bd79359-515a-428b-9156-6fcfa31426d7.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 0x49bd96336ddbfcb23f86afe564ed379dfd14cde70e7ba4d186700b93856c1c02. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWW2403718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f6aa6321a0239204944abce46bfa6ccc3a93e48ea643bff9bb053754f14cb4. 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/QZNWW2403719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1379cbd6924fc2192c6525973d5262a4caa5c0b6dcd2eaff462befe2dbb0b2d0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNWY2436287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2886072e92da282cdea611425554599d2ebc18e1ace5362ba7345c110ec20077. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWY2436289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1379cbd6924fc2192c6525973d5262a4caa5c0b6dcd2eaff462befe2dbb0b2d0. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZNWY2436287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2886072e92da282cdea611425554599d2ebc18e1ace5362ba7345c110ec20077. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZNWY2436289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027ad044f3d405da0100cb6a54c869045356830f4a2e2145d1c5d74961323eaf. 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/QZTBC2471271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41049de47083b38ec9d41254ca2f559e8ae5ea1e6ae1899371451f101021849e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZFYX2569646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab362c62fe1cb09bbc632c083b735cd340a107cc091ac6a8d49a15c87ceaadf4. 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/QZFYX2569647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b371065a8a8863e8ec244d34f9bec13743ee909590a35837fdf04f3867f14e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZFYX2569648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3411e9aa3d8353b33d199b73c50b863263e1aa0678996265ca220c0ce9f0050. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFYX2569649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bb4adb3e7ee9049a48c3f37a2c8dfc799547a7eb8ab67709f9ae7e44188a67. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZFYZ2599309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d74d8c8ac9de92af2f5b9702db442d6c8d3efd919df8fb90cfb865eb37bfe4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2599310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf20759ef5a29abe33296c0ff105f55634f3b1ef9b68e8321c68d1b8fa644a9d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZFYZ2599311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d40412d00f9518844000f26025239cb406a589f41f699cb287dd6b457ae0c2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2599312.
I COULD BE ANYTHING I WANT (Extended Version)