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 0x29e40342f95f837be425375034d618bd3aa219c163dc3fa2975e9f7cf2c78e7f. 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/492f5316-0421-467d-898d-542c093771b9.json and https://artists.proofprofile.net/proofs/artist/492f5316-0421-467d-898d-542c093771b9.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 0x8834dd37d01f0865b17ae2a35f5802c2723ee677577e3095cfccfa1bf38a2577. 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/SE6A91875415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b2c296dfa141282e35ddf52f347a49de4b5df7f1d579f4a1261ad0335850ff. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AEA0D1942595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406297b7fd57a47c34fa9438c7457ecb68c3c7d01e0c06782947c5172fb18554. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA72040228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cee01b61daeb27572e1060c32187a2ebd3ffd19efb08ddbe7ac254eecc9def7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZK6K2035557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a336f5d88e4af35ff4698cf64431452db27bc3eb5e983152a8f4acc3511f304. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN62137245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff3a982cc83e6bd3f4aa70092794f4ad7c7e53879e8b3aeadb476b8cfe98c96. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHNC2132515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc2a7e765c9658254faf771f5f3bf7561cc1634aa65055a8fedc6b3df05a981. 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/QZS652130836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40282faeefcc82756d6d1b8c81fdb16ee7b86dcba84fade163f9668d507e9410. 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/QZK6F2105155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213d9b6b34af94d5aee2fcb0573c7680d5d39c6ff63f17f361e9aa01501e58e3. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZW9L2291819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3c740d7bdda38ea07189df24c6dde39e0b0837ec157f0b14e3e73dac49c4a2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZW9N2236549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432b3f2d13af40da8da81ffc542f89ba51ad0d5070e008cb9e7c4078607447af. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZNJX2326407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8aa1954a99cf45f817f9389fffbf8d213948a836f093d0db9d6853fe558485. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTVM2346653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6de59a9e43c6a46e83627312e3ce43caff2f7d34d566bcf15beec4718e5f829. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZW9K2387275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fabd443afe3b30d8c4d42879d4c47e8f95643ff38f9bee2f3bc6e57f1b72109. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNJV2414156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7192da1bbb7eed53df6f587d26d8a0ae69bbd5e89920b9105a53162c257d30. 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/QZTVM2467563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44744f81a99c1cb743fe424a0bb56a0a3fe49091e4973fceb7cfe54e97619f1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNJZ2578602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578e44da564847b6bc47f0aff2a37354180a96ec8489b418dd6798144a4fc5b6. 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/BK4DA2500537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bc4249d41ac9713ae15157e7d5737e3f58dafa08aa733338716c589aad861d. 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/PT8JX2200003.