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 0x040192dcb94442b93d16761138437c90de2159422047d1d91696e13b427ae58d. 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/20490a25-2f66-4256-ad7c-d37833c97a80.json and https://artists.proofprofile.net/proofs/artist/20490a25-2f66-4256-ad7c-d37833c97a80.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 0xd31b014dbc2cffe37bb8faf3ecd069f51d3ca1e0bcf35f73cb68e15d40312472. 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/FRX201912594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d01bf3ad2f3213484e784d7c576302908b9314bb4e7587162e8b0a7bb8127e. 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/FRX201912380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b7833db4cbd03bc4cd5586ae2d7cb8cf8af886caea73fdae5b30ce9af0c8b1. 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/FRX201912382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d07755b684d91554b10a25966c7852ec7cb1c6008c2a14e79597fe41102aaa. 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/FRX201912385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106733235fb49713b533b6f6abbbe001ad476dce8c7b4a1531fbefd275049b31. 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/FRX201912551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05f51f7d44d79984261138fb77c3346766411a427e9f38b337306fe7f6b365e. 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/FRX201912548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d419d3ba66d9e71036526182e330f52f2ef427155a64d6310c62777ae6821fb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX201912608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e034b9981bc8173373b7260bc2466a937e92ef8694da5d884f0c8481501451c. 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/FRX201911927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a46092c71a54cce81693d72f4466cbef53330306084f76f43e4e14aeac40e3. 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/ZZOPM2232678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd018b644679253af7acda45f0d41ca81685553daf6fe4a1bb7836165a9681f. 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/USQX92200795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14160a2ad878cbb21748eea91c2561185f5052bc2ec662ce5e770ce69a60101. 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/QM6N22185375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5891cade21ec67ba7f737c8daa2510b8bb82ecafba3a70d2f402bcd43d42da1c. 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/QM6N22185391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34def96cede84f01b406f433df883026c3c03f1907f0efc72428053a4fc4dbd0. 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/QM6N22185415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f9b77461e73437176600f8df16403c44afb590085e2a956165d27fd34a2cd9. 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/QM6N22185418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc269def702927aa2dd870b39e1995a07f48fc16f5eb2955fa95d176a3bdf588. 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/QM6N22141394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0805dadb335b083153a4022c6e7aed871c78389806bccc42bd20023237b09b73. 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/QM6N22185480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34def96cede84f01b406f433df883026c3c03f1907f0efc72428053a4fc4dbd0. 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/QM6N22185415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc269def702927aa2dd870b39e1995a07f48fc16f5eb2955fa95d176a3bdf588. 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/QM6N22141394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a214a9e7af457b7774b9fd68acacd2bdd87a8fa45db764de033f1e8444b8fb. 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/QM4TX2180117.
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