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 0xa4796e9ffa627fa6dc254ad0e1985eeb9dcab5919f3be05e9c47944b8a8ae81a. 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/1bdeaac7-937f-41b3-8fba-815467938b73.json and https://artists.proofprofile.net/proofs/artist/1bdeaac7-937f-41b3-8fba-815467938b73.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 0x323db3a95f5adf477ee5821d365e3d8c475ab0acd4af33e83dc9094825266fa4. 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/GBK6Y2452024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263b97b6e829632cb6a517328a8aa02d1033b9735b5ad75c08e9172e8d13954b. 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/GBKQU2458511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b18d2bafb3c5d6eb40b81d001df6405bba6474afbfe30da9d6745b496b6380. 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/USNRS2443559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808166f3a945f72db2e0a8454011bf656e6ba72843435d92b49a8d6da89d47fe. 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/CA5KR2449569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c575f08026ab2d0c12c4f7b0a19b03313bbb108b319117b7b2efb42c3aabea5. 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/GBKQU2434091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7632d535a86c2dcb6b82fa5383b7cffae42e954ec73b399be94ca7aeedc38ff5. 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/NLRD52339176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da5136bac495186e09e7363c12f64e109d887f4284a92ccb10381af0dc00a21. 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/US83Z2466656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3319248d7e7630fee9b825837d436ac0f8c6e14e6bbafd757db6857c011ae110. 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/USNRS2443294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3283d7db764a1b56237ccc25853ed45f78256402e9d930d40774cb0c8aa01a5. 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/GBLV62320188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4f4f788189ff20d6fc7f27c0ba694187c6b2c1552082213db8a4f68a33cf09. 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/GBLV62306749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c3a858d8deecb66b22fd0c5f89dd1082a924bacb8cd390da699b741b4df275. 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/CA5KR2391691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5469282577724e86f4a0f1394ba9578d7e05e9a0e88b5070b88d82c034ba93. 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/GBKQU2374147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463a65f32a3623e88b1cd6f09c6b63927c04b3d6509ff713c2d417f54d86d29d. 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/QMBZ92340704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6716011c89e16b4e0421f9a700d634f6c2829415e396b5595e91a38b961ff797. 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/QM6P42368550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf13fc916f49f02224f0603f6c1478cd3221d1cf2bc721d12d5f255a33176b4. 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/GBKQU2330192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccba2fcf4ac17cc5f1908dc74c27639e6be91d981532e7304af9cf7f8f9a6c5. 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/GBLV62209709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acfb8c4025af3901771adc9675fef55009067df66e86b8ec16655f0e94a9e6d. 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/NLE802200429.
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