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 0x9beb19d690654673443c2442f8e52b03be2dbb3f6f3f8670a174b4bf07f56a34. 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/5293550c-ae85-4431-a6b0-5d59af8498f3.json and https://artists.proofprofile.net/proofs/artist/5293550c-ae85-4431-a6b0-5d59af8498f3.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 0x53b7a578befde4a601a426861154ef6aafcbeeb05aeaebf1d78e7afabf53d78c. 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/QZJPM2478348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475fe412f103c9f081fdf13235fac88c12bbff5386314c75fbe7d7f4af6886a7. 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/QZJPM2478349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b2c32b628b78474bbf67ffbfd671273df51b8d22314241ae4f0df465b76e0f. 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/QZJPM2478351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e436b3b7efa9e2b8485c8927b770c11b1bdd8ab65986ea62efd29527368a72d. 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/QZJPM2478354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893f75331ba9dbe5db3e5bc28b22db8edcb556cd5d53eb38ce4fa8debf3b7767. 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/QZJPM2478358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2a6f602314c338b749d0bb78ba1df7dbeb20e47e4e503fa336fbafeec3bae7. 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/QZJPM2478369.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d85927c5173260bec7f8d62b47dfe478884d0d54db1c4b9d52c3209e2477f3. 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/TWKE32426601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49265d37d56e1dbcb3af12c974723417b037c5c5d77a78763ef5f16ba3d5c7b. 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/CNZ502300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9c3637c564cbbfbbb1db484d0cab1b968088197e7058a8088e7b07a75e755f. 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/TWKE32424901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a7bd9061641de423dcf4c0d5edffb56ac3883852c5a5098b23e3029b737ad4. 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/HKE022200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0500091fc091127b42214f5f22535d616cb21e9360690c420cfd53e8bb563881. 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/TWKE32317601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484e64b9a9158baa79b23eda13861447c3152faee3bca8d7f061a3d1d0566e64. 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/TWKE32321701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67661786a6538a61b6146b10352d3bd01d6a7021820a88ccc775d6436909803. 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/QZJPM2499926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc96f0f216a8f24f46e4aaca72f5b6ed2a620af380931b64b21100cf6863800. 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/TWKE32427001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223847872a2b2fd0d4fee283a5b36a13c4df268569241f440dc57fd2801781fd. 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/QZJPM2481416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97fade05721661420951260c391ee8c2e73822968d0969f37b14b60935a2736. 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/TWKE32318401.