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 0x74335e4c9403a1265330b22c2a9a55b5dbcb1e9ab76dd03489d86e3fbfe9601e. 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/ef8f4880-5311-40fb-8437-b8c33ca2f553.json and https://artists.proofprofile.net/proofs/artist/ef8f4880-5311-40fb-8437-b8c33ca2f553.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 0x6c017c8376414eb8b06c3a11a1cba0cee8261462e0ed2758c74b44176d349a86. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:08:16Z), 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/NLX3E1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc582f78beca7ae638f3592e2ca3d6f9c8dc44183f642773f6d7c1c054fd8da6. 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/NLX3E1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1309c3bb7d474c0717c2fe9b210fdd7f8eb2cec84cce0511ac994f95be1bb3c. 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/NLX3E1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da98f23f5c0ab3d5f65ccb92ae74be35677d33a42e1f7cdce60b3582fde50af. 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/NLX3E1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e5137979ed63b55a54293038b79f0966486ed491649c628ab7d85600017567. 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/NLX3E1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8b2554770c0bb34bdd7317e3f03def67f390dc8a144c60d6dd3fbdc4ff5cb0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLX3E1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524fed98ed82d1ec6cb8f70561e54747a71c356066ef59db2f1026f681ce5421. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLX3E1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf28a693d5e88372a9b59313b11bae96f22b179efdc3162974cc8a08886fffb0. 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/NLX3E2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5e8793d0edb5fafd0edbc5000af319c8f7d109fdbc5d2780bd825b677a4c0f. 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/NLX3E2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305435a949a1edfb91e573410ea88f84fc7289d5adf217aea4f57e5a8146c0d3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:33Z), 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/NLX3E2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654bb29f690cec88709e493b55917422a518ac36b6510704a387151805ee5df8. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/NLX3E2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2216a90091496a97887b973a907a88cf2aab2bd1c97da2eeebb87f4754c942c2. 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/NLX3E2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfc4b7f4791c335108dbaccb5731b878fdb648b067b8253df3adb77d2f2e6db. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/NLX3E2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5fe91dd731f0eb4b33ce819405cef590dae786a6c76f994b72e54b73531ca8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NLX3E2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d8b1979f69577ce8b9ba3db44329311b9178e7105dd99140022739285666e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLX3E2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a939a7cc9c9e463698405de24fdc47287a93f37c46d524176aa18ceb511cf98. 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/NLX3E2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5f483ad2d632bed1b39d0161a43aa6eba9644aca5bf2bd060eeba67b78efb5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLX3E2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07062c8807aeccb499ffa396ae248e1ff443ddba2f74647bb6643aee9b46066. 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/NLX3E2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde1b191ad6709a21d61e9d1ff338070642ec2a3c561a77f4c3012fbb2d6b490. 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/NLX3E2400002.
All You Weary - The Nashville Recordings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde1b191ad6709a21d61e9d1ff338070642ec2a3c561a77f4c3012fbb2d6b490. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLX3E2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e9cdfe2e2b9e9a99244ea1a1fa3571486bbbfcdfffd5db7c28a53a9e97b452. 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/NLX3E2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1810aa93552525457c334e8fd326a2f360b929bfa710c8ef643cdff2d32ae763. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLX3E2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002471cfbf2c8ea734dc5c45b6d8ccb0f4908b2ff7fe0412568e2ef9c987371a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NLX3E2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d4d1d608081215e54b283d497a41edf2a6c4e33a800a4528b614e63a474444. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NLX3E2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1412debcf39cbfb924e23d8f68a273a5b32906bbc36c3f47a2afd95abd360c6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLX3E2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e9cdfe2e2b9e9a99244ea1a1fa3571486bbbfcdfffd5db7c28a53a9e97b452. 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/NLX3E2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1412debcf39cbfb924e23d8f68a273a5b32906bbc36c3f47a2afd95abd360c6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLX3E2400007.