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 0x5c3b0427911acf88626e225485e958c6eecc23d844b8bd0f576c41aa18ea7301. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5cfcc2f-bd25-46b7-8f5c-bc54c5ea01c1.json and https://artists.proofprofile.net/proofs/artist/c5cfcc2f-bd25-46b7-8f5c-bc54c5ea01c1.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 0x537a1c380277acbb53263779ab089e691840d224418c50cc9389d1d311fef2b5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ22591307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cef87c35283a5a56c46ceee10b67615f7ff6807ee0fc749288f36db75c2443. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ22591308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e67025678754f10718d99cc3bb6b1db214415fb0b7b53c3c8a23b45621e1fc8. 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/QZFZ22591309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0149895bba5374f6c27624194a4fb3644a30e859b908ec0cb2412c867e58500. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ22591310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d8b64b6287c8223cc5792d4bfee411594804fcde69f48196b5e613c1ebbc8c. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFZ22591311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77cf2865cbd362b7e8e91011d05d39f0233200cabce2051163a3d2d56bb4f6a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFZ22591312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb60ee86530dd608b61d3d00e0e6924a9056b9043e794fa564bbfbdee539451. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFZ22591313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9912a6e5a01c4bb34d86c095a84d3c12d7eaf3b8cbfdcb8d0d041dce6a295eed. 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/QZFZ22591314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b3cdbd9a4e8e90ce6da1336277ffdba4eb5b8eadbec6582f2b85e35afd536f. 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/QZFZ22591315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036c7778329e36a24e375a07c15cd293ce3cfe89c46118bb5a2dd91680e9d911. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN72577262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687e3a36f426d959b868079900f245f72b2aaf9eb95bfd9acb167300e9f19378. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:51:30Z), 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/QZHN72577263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9cb87f7acbe61b54d98a2efb2971285f980c854f4b5f0efc8b2adcbee81879. 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/QZHN72577264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e2d6c96ebfb21dd6b10393ad9407d6ec0100e1b2d36750fe53402e0e177684. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:43:13Z), 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/QZHN72577265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d22d9a4e2dffe0ea7e45637e017789469fdf6ad1bfc0de578204a5102832250. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN72577267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8e506cb54e218d0d7b7069b5785b01412357797ebc874ef86827d8d2ec7597. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:27:31Z), 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/QZHN72577268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9826ad0f32b24239c3d161b5d94de596fa5333b87da64e4cbe0767b66f1f40dd. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN72577269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc9d74d7268fa40317c22ca6a68000ee82d813d013b5822874a074642d88cc9. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHN72577270.