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 0x590a46931ac4474503569aa7d8c8d1dfa453349d347dcee5ab05617971f2b923. 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/734203d1-ec2d-49d6-a130-3b7dc45dab8f.json and https://artists.proofprofile.net/proofs/artist/734203d1-ec2d-49d6-a130-3b7dc45dab8f.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 0x382ffacadc53172292c6963d442ddbe6e206cecc1ad4c6cbb7f60f70b163e992. 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/QZHNA2281562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce145ceba951d9ff1d9e174a9e904ff5a5b851b9a44b62328eae5d822d92c7a6. 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/QZTAT2127575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d00707430df16b7e1f780708bfc6bad4dd437c40d9b8d65b21494b19864df99. 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/QZFZ32183920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1435f0751f00a8c808c8ef6fd5f1e2e31061ac42cb65de3e0136ad830f4a11d. 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/IL7532413275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59592dd12dd633727227061c321603e8a0f843a74ced0f205681c5d2afca39d. 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/IL7532413276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657ba965809498ab27d897643f70dcb2007204251aa845f51fe4ddcecadb63dc. 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/IL7532413124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0180d531ecfb6c10e718e9ce4a8dc699541eac3c25d89b5ea5a781177c49cd2. 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/IL7532413277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3224b25ab97befdf6ef4405d6ee3edde8bd511718fd67c61502e1bc8b77130c. 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/IL7532413278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278ad0134f6ccea303f6353295f52e495c3ac04f5a5ce0fab122668271400e93. 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/IL7532413279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8718c7838671ed212dd0c78c6e1c9cea75bb39e61763c75c5a0eef89b415fc09. 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/IL7532413280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1b76da0c6f7e7a05bdadb1d93b9f08cfaaed778568553f1837dd65c07681a7. 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/IL7532413281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff877969d257bb44f9df19fab3a0198878cf36d5117fdb96b8e6a517b1b7823. 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/IL7532413282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145febe4d4250c739c9a489a531f81414339286c83668e270f4aa6d297672b7d. 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/IL7532413283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888b2d6a6bcb7c95a22d9f33e171321af8a7047df77fea9f5b6aa7ab3e48093e. 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/IL7532413284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68c2090de8955bfbd70ad663b1435fec425f8c1a216f7e8a3c0c47988515eae. 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/IL7532413285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77958ad73117762e4c6c4fbdabb3ba0758cd1b020a213c984af6c15d01aba63d. 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/IL7532413286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21264a725ac155401d603da233e2c156396b6758fc3330d68d4612bece20dfe9. 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/IL7532413071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbed707f1b73f36b758dd33a826bb0146003223b2c38e093082ff2d96fa99a3. 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/IL7532413247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce641a09f0edea9e3042ca95d5e2abc17efaf9053399aa5266cf230f1033d05. 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/IL7532413249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeee8168ec703ee1b6529dca5dfd4526316c897b363ce40249f63566500431f. 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/IL7532413175.