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 0x84a0611e1b15ceddd3933dcb71ca79edf778aaa194c824df2b89ceac320a2614. 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/b29bdfd5-1a02-4c8e-a845-5e8a6c62fe2f.json and https://artists.proofprofile.net/proofs/artist/b29bdfd5-1a02-4c8e-a845-5e8a6c62fe2f.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 0xf14deeca382666531e01a5f81d0ac3d2dcdebf969fdb62ad0c917328e71e4db4. 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/QZFZ42280863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8707315818590178b9432b81db5bc05e84ebe77f84f1faecc6e6062b8edb6b5d. 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/QZS7J2256864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ec3bd9dc5438766ee7ca8477d93467dfcd58fd042baff7bd935824c182c12b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6K2185212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a9a51dc66ef04a62d9cbec1ef4d415c89b8642f7d9565fbcc2ac3e0345e935. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZS7J2204656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bebbb49f7e154127de08b666cc0fbdc0fb583c72385a68d296c6a4464e7fcd. 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/QZS7J2236736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ab50ce8333402ff315af3c7057b40dd7358e02326ac3e245b1a780b3e76cf3. 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/QZFZ52109693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f44ac9b78eaca4605e34a06ebd01e57ddb53a48607cef1b980432da72c7a45. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ62118685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e883c347c666079af5916babbbbc22710247a408022447de8844e91cf007354. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:25:22Z), 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/QZNWS2145815.
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 0x3a1166e4baa952455d48893c24286f23036ebab051748bf626fa670eadf9ffd9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZS7J2238871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae391bece74ae8d067f99490ea13b34276ce97aa4320543967324334b3b8d966. 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/QZS7J2237447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecf06389a8b4cc4bba562879faab87f0018aedecd7048b5bf66f2e412583b3c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFZ62132562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3669ef7eb96cb495eb8a25dad291b496bb5a6e5568a2b3081eb7254e576dc75. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZS7J2223193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3085137c1f96ffe2872f192f754639c0020e9dcb60e6cd4a63660b3dda9d9d4. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZS7J2243633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9f5bb17b6880e2c289be2c30a47820b2a5fb57350ccaaab6bfbb9079b469c0. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZFZ62121408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2e551809f1d93bc0c06d3786647b143f099679bbc4915c4f9991a3b2f7b99e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZS7J2205066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efc8345ab6a3a99e3e8a35f3de257f8326248204b903b8c347055c9aafc3fd2. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:17:09Z), 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/QZQAY2309668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dcf84ed9157d7b03da57432871923619343d0e84495c0d62fb3995d4d32f88. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZQAY2316510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4634a09c4e080357ef344bdcd906303f32366c2d73297e8d238796947314aa. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:10:59Z), 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/QZS7J2302797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80b6ca3f174c99fee615708f84e6652dcb4e8074fa0ae6acc688b3d03550f9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:23Z), 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/QZQAY2562925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047cc3217e56b6e768d3f75b7a63f56b7c5661afc06c976eefd6973a7775250e. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZS7J2528107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1f89566feb80c6653ef4d96f3970e567d247a7c39f9ea233f64bd9e66b3a4a. 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/QM4TW2348725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa92b84b1711025c3a97617f1fd8713d4f2484b4e5f8b7cffe00ec820aedfebc. 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/BK4DA2451067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0481997be74cd8d1c247eb0cc9f760a313ca68ad0c7f903069b0e84cebebfd67. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLFP2310597.