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 0xa6885a50975a639a097a00dc420ab7ce2a747e00610d26333470e9d498a0b0c1. 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/cdaacf17-3f0f-4d92-b902-d5f85493e483.json and https://artists.proofprofile.net/proofs/artist/cdaacf17-3f0f-4d92-b902-d5f85493e483.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 0x2173ced6d3a639c468fc38d2f1686224b75645ac86746cdd4788c024f85c1b1a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZNW72401384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e78e249a7a1f0f25341fcdc763cc44114b80110baccb0213b9ef6e1fddb7a2c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SE6SA2277656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0752d83bcea8390f5c15c4829a93bf77019211082cc37f097f649e45dac49f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SE6SA2288481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cd6a33ad380097c0beafb9fa49002b798aca63647eeb4655c53622676b47a3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE6XY2207646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f276181f4ff5bdb522532f26b8f122f60ba3ad1c58d3a0f3c6f64e72f2c715. 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/SE6HN2323253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49f46ee7027062b6361f9930d0c372f0f5cd7acb73297850e43ed091dc96f23. 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/SE6QE2328109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2461bdcb3bf41312ed9b4e2abaa81171047656516ae7e636647ea9ab857b562e. 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/SE66N2337870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7fd4c462ce0560d6d9a443d41bb6d7735a2620b542a8bdbab2a7dc25c02067. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE6A92397301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e23bfd16e498e84c24852a54cdbb474ad07628a68079ae8ef66714c1ad31cd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5BU2449826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ea3ac6afcb3a41d575979bb348ce3c4d0b5e2996f582d12dcdce58ebad6966. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNW72402054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e2b94785620fabb261017a499b49a91e1a5c50a3bf2a9524b441f3420610ec. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNW72410437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54efa8c407a0bd1c91778f4c73a8168d90539d195b42acd38a38747c79c83cd8. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/SE6SA2488408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc0a58f9712bce4ef3084e1daf55cc6402436583183c5aee398e6544c8cdc42. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/SE6SA2488409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f82da313b4517f2ea4513e2b082162f5ee62ffdea2b93dfae657cafa9c6eae. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/SE6XY2540755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2760c091269d1489de3909106bca8375cb522104c78a40b216a4a44cdbe25b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE6XX2549080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c0cf1fe526191045b0b9a0f3d9f119a4d5b440e048dd6c0d27b6dd54671a16. 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/SE6A92346395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c49f8c3cb40ceffdedafcef807cffaeadce9c83297473a2094b2e0e8245a1a. 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/SE6XY2262353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8561b8cfcf241f013e3d1270e59f87002155c54a8699c8496a50488d31adb4. 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/SE6XW2253481.