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 0x9f2de68de501d014d29fa4dd7eb4790ca1dc73f1300b72074e941254c1976346. 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/590fbeab-bb2f-49c6-a2d3-27434cb55e64.json and https://artists.proofprofile.net/proofs/artist/590fbeab-bb2f-49c6-a2d3-27434cb55e64.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 0x22c31ee5bc1a2018fee7c8e826a7c2e97454ffc421550fa46966965feaca54e7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GX38U2261944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fccac3f5299a23726bf9dec9d14c5bd328d7f29844462d920cda091e0982136. 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/GX5MX2108315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5e80b59ad85f6bbc9457833d1bc3235457f4daf8ab2658fca86713fdb429b2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/RSA132106401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdd1c9c2467d2fce0ae6d5457e4c0669a53fdac376396fe55f70143c832b107. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES92165945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e9f58516bda7e9d8bc573a83337c9de38a5a728f3f3a956aee619b8617d96d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZES92165946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c46b49ef9a463e7b579e1861779197f299e232f9aff9eaea648fd2f979f57c5. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZES92165947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17541f5eb5ee1f23fd7c495b1d23d2c41f3fead12ab3aa18e3e4e8547da30a5. 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/QZES92165948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc973e1a2406d380da4cf318cc114fa85fd0c4ebe888931c4dc0ea697e2ca5159. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES92165949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7368dabf137c76bf22e5b33991f3a7e1c86e16eb5184acbc38c22c610f0c801. 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/QZES52116749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb384e775506a8eded33b0afef1afda45050728a8452d64d22276cda8ba5546. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBLFP2090178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e21421c461958f8f317650b4676588a453476b4161f967eed9e20a0dc1d507a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBLFP2068722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56986d009f4c11bde60f2188cd13cc6089464e1d1f92cbd1e6cc2def34aedb5d. 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/GBMA22068160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aff501eee351e71a21c6879be0f256ba8366f4e5245e556e8f0eaacbce43e7f. 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/GBLFP1903876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d1a9c3f832eebea34e7c98feae127032369675b3f55e49705f16065a0b7572. 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/GBMA21987185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4ed5ce7e31bb5c91abeb2f7038863191e66de9ec8127bf8288071c91f8bdad. 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/GBMA21927397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41279516feea3fcacb0893259a51fc2d8f4db10a7e7be190bcbe1d9fdda624cd. 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/QZHNC2024981.