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 0x70c1dc033ef6f31aa25c81247fa193af3d105752f916814d59917718993f9ccf. 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/5e8ed252-ef6c-4faf-ad06-e1faed30305f.json and https://artists.proofprofile.net/proofs/artist/5e8ed252-ef6c-4faf-ad06-e1faed30305f.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 0x0dca78868a843ddfe65bd4cc695b5c4dda8a13f1305e3a0473d01dfefde616c0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ALA081700292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a9bdbc655eb6a6174febb25f4ee670ffc21d5cf55f4ca73d889a5663c6dff6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ALA081900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3622b61160e1775924d3b0b5e1bb8774f6ab5ec34931280aaabbad6c8acfc9c6. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:32Z), 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/ALA082100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa304ed2b538ff686fbda2aaa69256559ec4e961a77b292f2612c5596f0d72e8d. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/TCAHQ2358004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5c8952973d65cd87f8b3b55e5dab846f228fd9f9cb4fffad2458c60b67bb64. 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/ALA082402047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f981886e85d2c1c61203794665e861ce91a292a9154f576926d14215848c86. 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/ALA082402358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bd16e2252ea7ad6f63118e5e716ec4514733f5526c59a33aa2927103c4a061. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:27Z), 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/ALA082402415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f9aa955c2962b0085109025d89876d1ff6accbb5c06782695d4c95955e99a9. 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/ALA082200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d60cb77c2c92a7e63db0e565d304897399febce3b8dbb19be0b0eae5dab13ba. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZAKB2440886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3232400674df3b68cc35715bac6ac0916ba6000c7de6d3947c25b935ea2ca7c5. 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/QZAKB2369039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daad184d752903b8d182b068de5d1f87b280d80f575012b90e164bc8016eb5d. 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/ALA082200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfba57df6d997906dc882a93b580e335ca778d5296c7a94a10a0f6553121a8cf. 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/ALA082502498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1700962e2b38ec2c541c72b4337765094bdfe90dbbe7e69ec75e17b147f07177. 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/QMFME2454003.