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 0xd1a9f4bea0b8391c7f8bbeb6a4d0a338c6aed42da1abd615cfe384bc4bf64411. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37ee007a-2cbe-464c-8572-fe46b891d911.json and https://artists.proofprofile.net/proofs/artist/37ee007a-2cbe-464c-8572-fe46b891d911.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 0xf3127e7ee1f11696d8615375cb3ae136e3f1ff19544a47559415e41e9899695b. 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/QZHNC2374923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962c5541ef4c524ea04e0fd07d85afd91f75432bd702635285b30e6ce562ebcc. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZNMT2332803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657a358009a3d75bfb246e12b52baf0b7db9bb2c477b731759bd01235b6e0eb2. 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/QZNMU2391970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bc48be119c64be740d4a8c9d9e201e63315a45c3b563f75529c1c3fa0944ab. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNMX2366648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceccfd8824c293c3b19384901b9bbd64decfe7de860a2e3aaf5ba524fdcc10fa. 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/QZTB92300887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2784d9eb37eb50fa9cc1f8ab557b1e739f36bac043fa3c1b12b2611e847a46c2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFG2384726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a63a2d60440f138582098fca2218418a27336afeb7e906c731075f10aa50f83. 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/QZWFG2384732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55046301829ebfcef54e692ac25edb7ce4719ed198a02f4d28639fd3b1439f7f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6M2433383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb0b906bf74da7ff162a7604d6721e87f2c8cd5751e329ca3eb23b016ff15ea. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/QZL382556420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471f75c29120d0f197db548cf3166e2d407000a4156acecdcec32067ffbf6729. 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/QZL382556421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7e930ff8c1bee8bcbb72aeaf22fdec36628797fad86439373a8b2d5d5993ff. 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/QZL382556422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd014f0a80474fa904d4aa4434182660cd5d2fcddf0b549bc3952ac6dd23646. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZL382556423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2fab733fd019077c3fa723d7c550a789b5c8b432b26a084dbb13264f274467. 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/QZL382556424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf31582a1100d38e09e26a758611e6a28a8646f4b3d98bfae438c15006d4078b. 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/QZL382556425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388475add96857d75a8dd84faad729259e9b0f131591786a3c802f920fd0c00f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZL382556426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab60f97357b0f760f5591b8fe7bc5b1e93a87bbf714f51f98ba40ac5a18413f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNMU2581285.