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 0x261362e8d06732a262d6303aca74db2032fa94d64d0be4cd39fdcc30d90706af. 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/4a543480-4399-479d-a7d3-9fb70b9bd7f8.json and https://artists.proofprofile.net/proofs/artist/4a543480-4399-479d-a7d3-9fb70b9bd7f8.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 0x1fadc40416f1fd39fa0782969d9efce2ca41980d5ec12b47e1eafe11bf9a170d. 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/QZK6G2492897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94aed26b4e905a77b0277c6013f6a23ffb5ea23c085fcec56fdbe9755c0b166c. 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/QZTAU2323964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfcf3c3ec996bcb357c8e7a9a56f46bd654437c97bb8d9d496e122bb25887bf. 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/QZTAU2496107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdc916ca68c161096e40b9a617fe96ef764d2a4b7746986176030d4596db185. 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/QZNWW2410780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dde37c597cfab35a41eedf998296b6da3935218a3d8a1313fc13839a1c6b011. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWT2434050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e048d209dc0f809dadbb0a9106df5be10d52da8757518cdad967046a2679cc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAU2496108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9e83b8e84c531d4af05f3820b86ff2ffeb9116f4a526196e4ab3424b4b9b52. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPLR2475606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe376ad231fc675193243003ec2920e49b71a9382765e3cfb4fc9777b76a11743. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAU2496109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d35668da76c796c6f507c6b15e7e7b7b2b539f1f4e337bfe107951e28d94f8. 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/QZTAU2496110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7526dd5b1eff4c87b91b6850869db95cebd0898ae8c13ae24bfd68746c19f305. 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/QZNWT2351275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3648f38806b5dea056ccf9b1325c256485eb801959b90260d78fed29e2d1816e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42338718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81335bd4dbbb69e7632b51085f1f19092c9bdcf35114be758ba361f4a62d5b91. 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/QZNWT2351276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa046259da8579fae6719d6f662049769425ea993c066ab934f61b8f9f38a3e10. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6Q2368826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12b465ec9c42c428b3bcd3dc08dcbb4d337df3493e02ccd7a45005194b0ce29. 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/QZES62355848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ae450176350a5f9b8720f70dcbc9ffd39e8a7d81099fdbfc832ab511841ead. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWT2351277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373298f5631600d321e682fec361f3e5c095078edf16b19c8ea6d00ac32c2a2a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWT2351278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f7ed505ecd41087dfa264adb083c768071ba170d26e32529cb55a679b5cff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWT2372638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3c491a430a7887ccae4eeb486818928fd69e8006d8f5d9baaca758f4e1c4bd. 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/QZNWT2351280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ca4ec5e326b4a6c343969a1b99966922312cb856bca7040d9f08fefa2d228a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42396894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ed0ed780b34549dfaba9beb8494cc46f031112c94934be2fc33c5f06a67141. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMQ3X2402351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9e83b8e84c531d4af05f3820b86ff2ffeb9116f4a526196e4ab3424b4b9b52. 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/QZPLR2475606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dde37c597cfab35a41eedf998296b6da3935218a3d8a1313fc13839a1c6b011. 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/QZNWT2434050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dde37c597cfab35a41eedf998296b6da3935218a3d8a1313fc13839a1c6b011. 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/QZNWT2434050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386e2752715f383e4628d5153a3d669b4c4f3bf661555895e89ba3cf3b9aa0cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6P2423665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31156ce842b616b9601a387cba466e4f34fde69422f854d5c4eb43a4af3a642. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN52458991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a69db53969f99de84f1fc7eb2c0f1fc34117fa6e713cb41972fd91ec4a38f6d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA82498100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca7779d03dab422bd6a10f57af273aa4dec02cba2ea7d777e26a7a33a5966b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ22409817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee4f66c5bc0009832852fdd6e35130ce770dad63510c4c960fdd86fbf11aa55. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBB2356324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa046259da8579fae6719d6f662049769425ea993c066ab934f61b8f9f38a3e10. 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/QZK6Q2368826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3648f38806b5dea056ccf9b1325c256485eb801959b90260d78fed29e2d1816e. 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/QZDA42338718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ca4ec5e326b4a6c343969a1b99966922312cb856bca7040d9f08fefa2d228a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA42396894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12b465ec9c42c428b3bcd3dc08dcbb4d337df3493e02ccd7a45005194b0ce29. 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/QZES62355848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630422301b99b3f514b1f4bbe1e919f8484fcf3ea513e9b2243e70a84fa82bb1. 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/QZTAU2290701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c504cb4676b69486038eaf6dd17eb54d02a948be2dacd23f597c71b8c464b9c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMER2263459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ad1b705720d82a1d0a94604fe93866dec0e86f5e4de12a053374ca22294e6d. 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/QZK6H2257783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1045830951f7d291d2ed37ff19bc6172da3b354b648bb5a54c98408b1faceaa0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES82256730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ad6640663cc69f7a9321de3e7f3d6153fde62a9b4fd492135110b74200e3b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ22250567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0855b914e04d9b3da2156b010d8262d9e328493c50dfc99c137280980bff639a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWT2136476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18ebd3ffd58c71a555d4f61a006f65e9d4d075301f6642a6d20186dfb9a26f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6N2181515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4c8730c7c5a9611266047f57412d7421933ccf86974fccc3049183d4c19509. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES92178629.