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 0xf9bd3233394120b5f9ddf03998899bcf171b380c7ea91cbeae5da224c29a2159. 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/ace9559d-b545-44f6-b6d7-385574024b0d.json and https://artists.proofprofile.net/proofs/artist/ace9559d-b545-44f6-b6d7-385574024b0d.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 0x538ccef44f1575414775bd9d615a985ffb37a02cd14436e8b96aa753ef268433. 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/USA2P1345572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfb880f3ffba51f039eb18fd806fca9c5086a901862fc36c0a7bdf215667082. 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/USA2P1345574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc871b253d088a96764a5fd9192e629c2a9f5a72d9332f2d1008c03c7a8736c6c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA2P1345564.
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 0x1c378bc4369908cb357e8c4f3584510ef3f978e67e71e0fbdabf25bf021b5f2f. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USA2P1345565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80afdb8c2d4f940627b499b8b2e143a3f5998ad4cdb7f4553c8fa4951aa5af6d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USA2P1345566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56c87a4b1c5f395793d667181c07ccac31d397cb79a02640dd50f37f86da67e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USA2P1345567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06de34a1c5bea56ee9909b6dec63c55c3205ee606d977491b43529c62b9ec248. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USA2P1345568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a579e8f75fa47ccb726f88d0d31239298768056e680572a5cee92fbb4cfb4a5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USA2P1345569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6835f201ce783973fa3e2c9b26f84ac9c2fdce58cc26c99842f8cc54f756d5df. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USA2P1345570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9998995f63dd904c477a8338697a7e120504d42e7ec6d179f822b97c9282c0cf. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA2P1345571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0550c8b21529d93ca321720134868ee41d2137eff4b54a2abb420dd71b05344c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA2P1345573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7918fa08a1817a709231c8e926674f077777a7ff332d15f47f0b690ede05f60d. 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/USA2P1345600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1c646c499383f0450c2f54fd33c08cc8fba8ef39a4334042124e6ba6316254. 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/USA2P1345601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbe735aff44b671dd9a1258e04033b283509ef1a061297014ae82485b010c55. 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/USA2P1345602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a9bc51e2e135f099869d92aeb133420c70e490044a0f5dce54baca645e7e6c. 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/USA2P1345603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e09bb4618b42fb50eb15773a19bb530dc706078cfa37be10955533b7e5b566. 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/USA2P1345604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780335829923284022de7394e67fb92413d05d34a14108159b77167f16c99302. 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/USA2P1345605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07b83343fe946b5e467fa9b1fa51125221e46aecafdbe8444e5b7422cd48fc0. 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/USA2P1345606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a72a44bc4821f5a6f695dffee94de67ed2ce5db0c2c3ded60f54983475c6754. 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/USA2P1345607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49322eb72eb7b330e6c1aed001adb2f6b8906a96f87b9f40db21959e29b279c9. 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/USA2P1345608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c181cd4181864a5cab4ff5ef9f04b3b87061d26986732a49283a55ddcc51d3. 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/USA2P1345609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90d2e5376ffa2c6e94e8ba8b0648a3bcbcf27ed9edc56c1fb47cc505b6eeb49. 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/USA2P1345610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05fbcd5ff231ea73efdfdb842ae6cb67a87814116e53dee135f5929374ea6c7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA2P1345611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc40eb438d285cc54ca78c3b3c56a8ee2c6c8191235647ce6662168cb13400. 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/USA2P1345612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a69858923328bc254a796c3c475f628b7f31c8a863dfa19cc3a2a6a44a02455. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USA2P1345613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9bd55a448be62f1a7cdb104cfbb1c3d9f8aa1751579996679b309153a0282d. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/USA2P1345614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16feaaf0bef4062a03866fe8a6b35b9f14e64e07d3f507be7fdd2b6f570155d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2P1345615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14191b42146e02b3c9ff2f9cbb27e80f725b1d87842744b244aa670ebd5034fa. 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/USA2P1345552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bb0881ce34fc092a0e62d5d58e28d9c8915fcaaaaf09ebb56343c83addc073. 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/USA2P1345553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecae0bf7eba25d953828ac481609bcd1c7d954814636feb2fc1b15d8fed617d. 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/USA2P1345554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161514da6f85accf896e037ce4de653071b3e67169acb0b507cb7b39b030d3b1. 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/USA2P1345555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c3e257132602b6f7cf828773f4062a0788f71dd6b192e91b69dca3566efb97. 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/USA2P1345557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bc4103e3d4082c253542e02b974d5cc6ac9a17a1d4e93cc6dbf56944c55af5. 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/USA2P1345562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04176e8058be40542d8aea173e67b117594dbedad2528bc6e25c236801236fd. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USA2P1345556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fac6fc08873ecf9eaede5db7f59ee90dd92c7f42edd006559f47b64a0da3741. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USA2P1345558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654d8668962c7e672c7475be997873764d3d907668cdf071681b8354e2b51ee9. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USA2P1345559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc7976bec2ba439399f4cb8bd76e9bc5ffe036b9faf31e0cf3b7abfc888c37c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA2P1345560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f878cfab23006a192372dddfea0d666d3960c704feb03db2b981daba67a5e5d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USA2P1345561.