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 0xa1d833f96b30d2f21c8f4b29a640e97ef6b41fe683404976677a68a3ed685f6e. 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/f98bbdbb-8c6f-4cd9-b3c8-bc9ad0f3f1cf.json and https://artists.proofprofile.net/proofs/artist/f98bbdbb-8c6f-4cd9-b3c8-bc9ad0f3f1cf.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 0xf0a78a4acc8b0077419f8bb618331b91ca4c21569b00c3ba2ac343b5118443df. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZTB52378336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406b1608415fd62b8d08419fea7ebf8522369538bccad09d3375f0c17574427a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTBB2305489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75ed8d507634307ae4ad973aa14433315d2c4dcb820a622ac808eaaeb4c7537. 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/QZS7J2301099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd614179ece6301d13a1a262f12df09b1452be4c0771bbbf9a04be3efd650b2d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZS7J2303410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75ed8d507634307ae4ad973aa14433315d2c4dcb820a622ac808eaaeb4c7537. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZS7J2301099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589739418aec10b123a234856873a1440c502798b15a0b397ea553419700bff8. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/QZS7J2320130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4ee1b9c14943b4031851ebe0a5e9beff32881017783eaa3e9ac99435c45740. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZS7J2347410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d43b18fd4c7e12ddee8253badcad4e794856963e22e8a295d2444fd3928c8ca. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZSYP2305842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2405f3a3a98acbf457dc47ed19680954c6608d8e09f8f5cd63dd6f85697c5f. 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/QZSYP2342755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b0c5744cb15bc0187708f7eeb66ad55559e6527a479a46b8d8c9c4237b9ffe. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZSYP2329207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560fc96c3510cf596916a34ee8cbf846a932ae46f2fca467c4797e01ea6d376e. 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/QZSYP2382989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ee37fd0a37e6b3818a829cd7fbe5bada6a118de9a97f30cca67b3e84b7aead. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZSYP2320738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e48740e3e8e41cebc76aece4d6243ebfe222d2a6e890f38112190a540609593. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZSYP2353936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa059e148da616fbb811e03359ab798e71df2e61ffeb8648cad88cc967ace1902. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZSYP2367550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ac584a15de3d0c14467f390ab292a3c6bdc7b9627d900ec047d2bb923cf0c3. 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/QZTLA2469182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ac584a15de3d0c14467f390ab292a3c6bdc7b9627d900ec047d2bb923cf0c3. 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/QZTLA2469182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9f644f9055af68779226fd48f930e853ff3e3abb65738c2eb5d095b0b562f5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTLA2460429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf15307669a7a45ad76ff38a63ccf9956ecfc1532e2de56d36722a721736d14. 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/QZTLA2471930.
HIT IT TO THE BEAT! (Instrumental Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0de973f166df8b001915409c5968e07bb713c78f12c42d65d6b3aaca0ae757. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZQAY2460692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8920951d73f06ae69e87248738faeb1234cb5663712ab9705cb3e2f8ce825f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZS7J2440814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f979d257a2774d3f3d27b5fcc71414a96fcbd885c652c36926109d576ca0550. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3EX2468557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e12dd5b1dd3e605d440b96f9fd947ab5af7ca42358e87e662ee5d42f004c56d. 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/QZQAY2532459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1447bd04e00f857c82db9801f18a1cc4753d10b0ce1a56ffed5d299c13119c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZS7J2501068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e810f698bfbc3d8582dd3d03738e4956105e50a9c04b15889370329cdb78a8. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZS7J2571400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d1481778928b8e7b05b272ec4bb6c174396ced2f65d1451d339e6f6dd4f270. 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/QZS7J2581598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944bd0f234374d7fbe4cb99c456085f86755c70b8acad50c039189265adb2ea7. 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/QZQAY2500140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96693427ca2572a0c9d976b4e5f455cdbd2735de1b22e0a9afe33b54dce529b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFZ42418246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef0e953658b6dc2b84ac5135aebb5d0fe29b67c4848f15bc42e1d0642e441ff. 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/QZDA82482648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dda54ad7a6778b16f36caeee324a5ec72ef368136616db1818ba322e5bebd55. 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/QZDA82482649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96693427ca2572a0c9d976b4e5f455cdbd2735de1b22e0a9afe33b54dce529b. 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/QZFZ42418246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc48dad16fb0f22e2650db0afdd4921c47c44c4aee789759a704e0ef0840d15. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYZ2435254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf08b1cccec710760e404ba46addd7115dc657c51df8831f5c100a730ce209a. 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/QZFYZ2435255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce86a94d3829bf069cb47cef2efeef084bef153643180051699f3c512542a0f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYZ2435256.