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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 0x3d9f862957f3890880b292feddf5b56090cbf69055e78c20b1e9fd406a14d776. 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/6f9764d2-84a7-4048-97df-d5b5578112e9.json and https://artists.proofprofile.net/proofs/artist/6f9764d2-84a7-4048-97df-d5b5578112e9.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 0x2a884dc8648659e6d73d043f7e0db7230dbbd2ccafe61397560847dd47dc7db8. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:06:45Z), 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/QZWFF2335819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbf2db0fea0e093e70b52bc59b23c41107ce0bb608b53b873cc0d7cd37b9999. 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/QZWFG2304124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce6d2fa3a59ba6d950929d3b2d08641e2cb0a692be0e82dd288eba139cbf075. 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/QZWFG2304125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd6f3f7dd9d9db2a5cdc9517c58ffda90c15bbb7d17648898686f9342ebe321. 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/QZWFG2304126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61a3bffe1ea505faf22f44f3da93525355faf49b26905cc679be8af9f381f7. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZWFG2304127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fb04919f0dfa5f88968ffba8240a0870ea3aa95c54df835adc766da715a169. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFG2304128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fe8abb2d302cf20f3bbf47aa0753b27bff0eb2ec2de32d80a754d58af3392a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZWFG2304129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc455f0d89ad388301823aaa3242d5de573d49300c97a0ee01d176c4c6c6a92d2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZWFG2304130.
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 0x3005df807d228fc7d7a381dfadf994b2b52ad51d7084d6ba6456c89ef55ab618. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWQ2432047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c516852405d7c556122d8de75837a3c8387a4a31ba60d8316a34a19770dd3. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZNWQ2432048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8f4e1307a43bc7066cee460c12e861d6c8c3ea0bddf1acfd145e3cc601385e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWQ2432050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a40acb1f91e44025cc84aab6bd538ca8b92adba3fa4e864cbc33868e2ca54cf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWQ2432051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9820f971be561b303f7c4d1b186506f24079a01d4e473aea000988f3459597. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWQ2432053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc162e4e83bc543500c044edd323dc8dd7b2138259d246a077b529a559d5ce489. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZNWQ2432054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc08dcab346e57af00001847dba3dd9d1807ba2961af4b93b9a83e57a269a0f1. 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/QZNWQ2432056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fe712c23777bea5bc00e8142d1fd60769da9c06b276aae1fb5fd97ed887e33. 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/QZNWQ2432057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785c323671e09a64fcfe93804f544eeac021e98e17fbb7e33d148e55e2ee834f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWQ2432060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac2a07fc31b8d8bc3de4f8319add61e7ff48d6ba48a7e96975b6345094e8a4b. 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/QZNWQ2432061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ae7e78ad81ffaa43934889fed147733856f1eb3ab0ab0386626fae76b12256. 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/QZNWQ2432062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40569cadbc526677e8fa4e3f28ac2577e1f20b3600602c6e00be4b067ed1100. 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/QZFZ42045179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05026649d6b0d8c78c860cf4454ef3056c1cb69afe4d6e0a6be58f3a4e2ef59e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZNWR2069215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7583b51e7a2a0083c4d3732e8cb573fa267646d0bf843a0b86d7b549c41410. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZFZ62191263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163b691f67ea875380e43a732df1023b3f4f476ad8b499b625998ca7d19cc429. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMEM2174823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97cfe49d56663594106b624385fc4d742fd6ef0df6a973e660c8cf62781e747. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZMEM2174825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f565e0eecb582ae6556aee3aecaf3b5bdea44e605b44fe21fc72873d808528. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZMEM2174826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2749a2f4e205b82c83ba3588c9c82f874981ae5269f32a2c46d45dbc1823a44. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:24:27Z), 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/QZHN92236485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23888c874167ec907def3c005fe75933a8fe19e0d775fef667f5803a5c8257d4. 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/QZDA82461807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13d259165d5820633d6249fb68cd932827be953cfd81c1d09d656c025e4cc6b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6H2485329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f902da69e0ba3039b91da1815696ef8e863f507a4cc69b30f8ea61f6e80e3c3. 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/QZK6H2485330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3c771466bdada691341424559da9262b31e591667a8b153cd820ce758ae7b7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6H2485331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0258861ca9c168dbdfa38b6a2ad0c93baefb7a3a7dd3c5ae1a27d5f683663691. 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/QZK6H2485332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7187547fc79b2cbbf6f0259c564bc8f014cf254d673509923cf03c266670e8af. 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/QZK6H2485333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dedaa3b5758ae138a091b92981981e78f3492cc8be263159684560bfab9462. 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/QZK6H2485334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a62d177edf06152689d49fadecba58f28e1d693923955c8fb73b4eb1fc5d0b. 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/QZK6H2485335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026de55defc01e3fa3f9b66f4a47e3237af34ea4ddfbec94c29ebc2e06c1ad3c. 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/QZK6H2485336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2268cdacbaa595e1e9190ee118c744961e6e6467918ae5599bdbae1842a4b41. 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/QZK6H2485337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df47a55ad560eb6a232a7cc6ecc5cd564c6eef7fa715d8013cb6e924483b8c8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6H2485338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871e535e10861c476b7504ac1c312e34b81ce80d1679f1dee5e313b6791b963b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6H2485339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3360b12ea1ee1c234952e3464207b20ad777f1c4a8ee4a14a18df3dbe2d9ee5a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEP2190860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e41d4e25030aa18bb3e2c16053941d1b2635b27e1e657ccfcc222c774fa589. 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/QZTAY2352293.