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 0x439ea6cbebd8b82ee131a0a72671d60ccee7dddb0e88f61ff147722418120fee. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32bec5b3-b7c0-47fe-b37f-d57c3aca4d33.json and https://artists.proofprofile.net/proofs/artist/32bec5b3-b7c0-47fe-b37f-d57c3aca4d33.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 0xe39764363fa523305077a21c756947c839f49a2e886ff13a8a3bd5d07dbb1a05. 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/QZHNA2303658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb7384bf5d340098fb762caa79180d637c7f829807d7512b940ae0e2ef778f2. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHNA2303659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0247edd503aea0b6b48c4b917c4df582696af3c9388a21b8ac4887182173fe0d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHNA2303660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48007228345c229302601e844346c525ffac296fec55030b5d3a54662b7d19a. 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/QZHNA2303661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03483a954db9258740d43db34f5f206c5603e9b806fbf7a76cfac2302d458588. 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/QZHNA2303662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305990726fe44ebabc939569fdf0a10788559aad7a3cebeaa0fd30731934d0b7. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNWU2331648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0675a17455b087633419648898fa9dfe185d2e9cd83faa8b34a64d3d5e4ada6c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:41Z), 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/QZNWU2331649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e683769400ad0b27bb3ac8ba85de7a4e661393149b57466136f7fbb55eba44c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWU2331650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c39c20ad81bacc394039465d6d9f1334f0d0fb6c4e0fc20863428fe0808c8cc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWU2331651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2e3fccf7908056c0bf562dded68764efad11c72d6203e2aba9121c9aad83e9. 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/QZNWU2331652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaee8b6a51a23ae37733a0abff57590c887d6de5b941bdde9b4111255302fb5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLR2361685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea08d947055e14c3952006dd74272e874766aa6265ac1ec41137492273fc1b9b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB62323243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d243951b7d605c14814ddbc78a9d44f676a0e68ed97526378294ab4163c64a8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:24:28Z), 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/QZTB62323244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dfdcdf28e8c213f1ce0dd71767a4ac4f363ca7dbe6754fdb949efd1b83d87a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZTB62323245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0be67684df9de45bb13796ff85fd5767940c9d55af24e0e0ea6fe58b1c6c2d. 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/QZTB62323246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ed3794591a0f43ded34575172d1d07a5386bdc7a636408c480df9257e69959. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB62323247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e79e34de3a1eaf91a367674c46da979ce397fafe6260e9a1cac8ba280f0129f. 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/QZTBF2379703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa4ed1628ca06c205c992b2e22e11a01d1c3e322c5bc8e514937a9117232163. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMEN2450269.