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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bf2738297d6c5ab1966dd876800bc0fc6b4f549ac295b99dee44f551059611. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4dba67a-53f2-43fd-86f6-50870633a36c.json and https://artists.proofprofile.net/proofs/artist/a4dba67a-53f2-43fd-86f6-50870633a36c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840deb5811ba85629abace7b96b0c45d607238857e146adc81c5eaa70747b767. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA61838928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cc0585c911dab3346030f817b9c718bb649aeb5d6407486783b79120c1413c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ71903348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb136063e468cf6e68aacb592c02c62e9318a868870806aba1ee25e254fdd6b4e. 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/QZQAY2161161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17a47d6703b2e1ed9642e569513d7aa26869d1a7f4aa28ea0381189b92ea5f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZQAY2137206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c59dae5e6c8677f428c5a515e931385a598d5270fc0636cd5dea2bf21de0e4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES52184052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dcb6333ac268c34234fc2208749fc2292a50ffb0e53c717ee6483bca7d9f46. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6Q2194546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8916e994bd20319169c7081d1fb1cead6849eae831d674c65c520276db465ab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6M2100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18773ce0dbdb5810c000477e70399d5e8f5aa86367428d7fa7c85bec83e8acbc. 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/QZS7J2117519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ce62a3eae4c839c5898369778f0ae987dc49420337d96dde8a2322cbbd2485. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYY2207047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234f863e669efb41a0c2a2b005b118e889f3d7168bd892835c6880be62cc8125. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZS7J2278901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fcd480c382a4a4e88bfb74b9e6ba5d24571b7763ae685b3ec78bf17e418b8c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZS7J2252221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa237b07e66a9b6c3875711fc9b248fc44ab5523e84e6284b0e7712834409c74c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZS7J2217943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1aab64e47f9b804a67dc92290bb5fae9577c12469c7dd598ec6a2d2d957f82. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:28:17Z), 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/QZS7J2254124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f35bc840b099c72f55227dfd97af0928a21bdc14d3115f03bb6b7369a07390. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZS7J2231848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585131b3db4f47b377e328b9daa478114fcac56a14ed92076797ef85ec350004. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:53:14Z), 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/QZSYP2223661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d47978365729f9e3cb20387f01ae345a0af252f71e74a7db05faee24ab83a31. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ72334115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aa14ab1fd0493e53cbf72fda764ea96d45eb9ec9f514c018b9d57b6d77acfb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZHN31905810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1222d58db5a1677bc620cf34b2aa3409eef93892c44248fb3bbe4477da28ac56. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFYY2468837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1523b6598801fda16a1e3f6ba53833644feb9b78a9c1e21ff7b37d1537e5c364. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6H2109987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2e87b7a566d3c6a1b560c4547657677864f83cf75ef58d270c15f3e22de3fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ62240770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78961b7ed19cbead4cc41bda6bba886ff711d01398fdde4dc218174b45a20fd. 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/QZNWW2157426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5373d35d418829f6298950bcc194ae5e6924406438ae0bf49601d22fdf873c1. 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/QZNWU2164738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648ce29b8793f32fa376ef9ec68fa82938fc87dcbb02de534a2630948537bb7b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTL92194839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14b84d9d45da9e2b489cc8d657592994aa35f734b1dc4e7d98d391e1590bb43. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:31:55Z), 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/SE6SA2228587.
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