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 0xe81148dcf893a47d59add2a5541c2f5fbafbe06f29e9088c8f6119ce0b655a38. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a89924f-2e68-4005-988e-41ee6d289847.json and https://artists.proofprofile.net/proofs/artist/9a89924f-2e68-4005-988e-41ee6d289847.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 0x9df423c8441048b82af486f57efc8c3cd77c30d7b86ae26580a9d2fb001ee558. 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/QMLQT1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568161bbf5536205df76544db0f1b4dd2a81da7896b9a9e78928c7b7028cbd27. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMLQT1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054ed544ff4e65e62bd23789f81d221cb4812d7f672e4aa1036ed7f81ae0c82f. 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/QMLQT1300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461ad3fa63285f2ba5db8355bcb536cd9aa40a49cf354d72b98b75600ea42ef0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMLQT1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45211429d9c5ff2d19ab29e7bedad07811adfb107c6fda8194815ecaca993b8a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMLQT1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e6363bfed767b98d66e9d1518ff7a0fb95f5463251df67006790166e555628. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMLQT1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212ca0d9ccd33e24a8c543fd29f30ed61e28ff33677a4ffc5c95a61ce245c2c5. 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/CH6541619545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827b6511c9334bde26aff99f73956c7213ef43d5574d55a7ec5a90711a3cfe7c. 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/CH6541619548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415d597b72707d87dd0ef768ef73788169e79203fa50c2fd0f495b2fe6bc9623. 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/CH6541619549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fedaf6e876c7a49bf04b94d1c68acec9484a1f768487e8aa0b8322cab64a21. 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/CH6541619550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3a6640cc337fcb35c34ce8103ff92ffd8b2db029a5c96e473aea6cdd0be527. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6541619551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3df98154414a2a8036ea24c36531219f2555285b6aeeb5cc347bf0124049cb3. 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/CH6541619552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bef28cff23bab955ba323ef7905738b7572b734935a8e320e0aea7de8c45c32. 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/CH6541619553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727fd3c467febfc769837bc8d174179979c00879594d722719c5d3d5a4e66a4b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6541619554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc297dc16dc4edd34f7c1c7c3a745f50918afcf82b6d3da4bda8bb12034caf937. 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/USHM21823298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ab01ed3b58c9b890683b2b055e0baa2f00bd7ab24fd751368d37e181939c71. 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/USHM21823299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b17a77188dba9a6f863aa23647b346863ed9283e79d854c2f6f8aa094d103b0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM21823302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416c68025d17fc045d4ea9c7451f2a1daea05211e2dced987b0a259b8ee7e3c4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAHZ2403486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bca00f52bb4a935648642813b985b3bdf36a78c4a94a198a5292d74859a482. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHX2468249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e6363bfed767b98d66e9d1518ff7a0fb95f5463251df67006790166e555628. 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/QMLQT1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8ab0cb2eb7390c98f3bfa9ccfda43343336252cac067be2a3f6fce641e92f3. 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/QMLQT1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bf8166f3828ba75577c39988f7ee1a9130cd164b85a184f74cbbe6b8b69124. 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/TCADQ1802362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec472f521925bde12516b6ca5ea20581920d471cf40ed177c3033fde024e60e8. 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/TCADQ1802364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa9e181a09525a3d66d73f25ebc9eca739642cd352c3b10e7d69a238f1030b3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBUQH1800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea3f840a4c7a0d97930d3c1d1a83b3762cb60c6918ba3f1008b6a8bea51b070. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBUQH1800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcd940abff5aa0f67bbcc73e1741a5f61e3789afcdef3e1a6212c8538b5c70d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBUQH1800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798025fb62966883055153d6dc277266f0b3a5fd077767a885811198728d1aeb. 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/GBUQH1800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574170996e9df99ca8ec7eb2cb89868b5b9f7f78b9b2fde70629f0462e15b55e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJX2234306.