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 0x6ed8de7dff2640f879236512fd1c51973a2d5ac172ba5f83af6a0c6d59ed96f0. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2534ef8e-fdf2-4c69-8154-e8f5dc9a5588.json and https://artists.proofprofile.net/proofs/artist/2534ef8e-fdf2-4c69-8154-e8f5dc9a5588.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 0x023544fdb318685fb00e8e57906b7bfcfc182a1e6eec74a2b1551773f10273b3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BCPY02300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cad4fc60bb8fed70fc0c2db71f80ab7bf04d8657eb0a5804e83f0ef4a7c4346. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCPY02300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0c670c2b66e0e5ab2e4280249b5ed84889d1ac95894ebe71071180a8cc27f6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BCPY02300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdc1ce8089dceee690a85e8b1fa94618163b3f55daeeb64914433517d7dfb34. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCPY02300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb268eace7e6f470073666cb5a205a67a4776eb080709d2ce961449f1b19e0fbb. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BCPY02300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5150b89d83244a293262c60cb7d975fae7b7a9f40ab3d60819e92c1b59b41cc8. 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/BCPY02100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1c9c0be70038aa0f0d522f9eb0afeb58df1c71bfe31fd5498ef9c24db3a2e3. 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/BCPY02100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee865c1e4fabc0a2af586ab3faff60bc81caed6d6552e665be3a50dba899c06. 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/BXT8S2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a6232e56d2dadf198e1040b457a638fff453e233727f70c04961c2aeffcb1c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BCPY02200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76def3da28c559e059b8bd55abfff0c2909bf7f1979052af1e07de8e5f3fecf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCPY02200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eaed18f588388afcca7c42c92707b5c51f3b85933e90b9ee2b97d6755df9a4. 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/BCPY02200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63fc427eb31ab0a19d21fb600cd71af3feb0569c5d4fedd2b0234f87d2faffc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BCPY02200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0243a502d46848543a586f6973f9d380c9825788a3282d33e0cca2ffefce94de. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCPY02300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0932c662d3b532baa31ea7f9616e852405b156be3a9671ddb31ff28cd63e0b1e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BCPY02300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08836b552537dce8f100f6a6997dd16d1daa0d00a927b419cec077e868d7dd0f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCPY02300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1e024e8ad89b77695f3a7238cd098e6a55f99f6adf2714076cd3069554a0b4. 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/BCPY02300018.