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 0x4c5d2cf5582ed9d08525caab9ac8ac014ff31d7d504a65056e80555c450885f1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7e71f0a-0241-45f9-ba0a-086ad47de083.json and https://artists.proofprofile.net/proofs/artist/c7e71f0a-0241-45f9-ba0a-086ad47de083.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 0xdacbc7e8bbdfee6d8dfce494b401b5394c55998cd9a2b7c539d5274816eb8bff. 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/GXB722300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928aacd5be16f8c1beb37396043c711369a44feef5837d582d41a10d0a73934f. 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/GXB722300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9dbd075d8d065c9aa75b769029ea7d7d0c147f314203a05211b3b1e37db5d3. 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/GXB722300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a1ca792ffd4032483656479285b949fd8214182a3859d795a12b9e9d130cd7. 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/GXB722300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c460bc6c6c0a945249073c8239249e71043bc3ff0d26512c9b4d9f4fa47b3b. 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/GXB722300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9f4e247e7ae20c6298db700e120f0e7a32936f7b592b15d6fabcf588cbfa4b. 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/GXB722300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17057b998cfddce7d796e52d112fa606310963df3d8a2e48e9ae52c06584b400. 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/GXB722300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d898fdce0258d238846cf8493cc5d1a0c244fb10728331f54e54decbf55089. 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/GXB722300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cdf7b26a6dbce0b24891b14f030a9bbc0e30d840306e6145d234bf0ea88258. 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/GXB722300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a312b8db22c63a0b9815a1e1b43745601efd92373d355419a9dde1e648c2ed. 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/GXB722300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8842a347235581ef905dd0575691642202a080cd59d27957aa5eb9a6bda0b6. 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/QZFZ22076239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf29cd6f26a61235c944630918b4f65f7ad5a9b7ab91c97e7e513155b5270bb. 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/QZDA52077708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47e534b82fee15be7952628f808c65297dd6cc72df85149184b67da0ff65ac4. 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/QZFZ42089346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89443cf326694b8beb03017ceb648139642ded57ea1d87b7dbb8ddc4a152d3d6. 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/QZFZ52051635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45d3038a3b833685d0a0ce99350ed79065f561d9189230e7bd786a3219c301c. 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/QZDA52077709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e06514756f41d4b887e86284c3bbd87c1eecda53d9d03daab7046d6a88ee68e. 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/QZDA52077710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c985e0e791a19ec3d4d28029922fd79be348dbc0320d60835851568670788e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:00:06Z), 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/QZDA52077711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1611ea7d64f6fd31ab58eedd2159eb7c1240dcfdad883b1e1954501ae3c42847. 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/QZDA52077713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7a244ee289a1cbfab5d6adf792299abef2ad4265aed0493a665c206c890a13. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA52077714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfee3eed9e183fbe25dd654a9c9409e220b924c46df2744f69eefeabf84574ee. 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/QM4DW1781910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d58d0fb1962d2f76a2391fa007781e8d9d8efeb5162e39368c67f819de28829. 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/QM4DW1781913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd541ac970ca07bd6b978ff80ede8ffdb53e007f0516f67aa8991d86b32da0b. 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/QM4DW1781914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c147083553be733c2346bc5c2900301c347c7145193b973c9017ae2052cabc. 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/GXB722400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cdf7b26a6dbce0b24891b14f030a9bbc0e30d840306e6145d234bf0ea88258. 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/GXB722300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9f4e247e7ae20c6298db700e120f0e7a32936f7b592b15d6fabcf588cbfa4b. 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/GXB722300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacbc7e8bbdfee6d8dfce494b401b5394c55998cd9a2b7c539d5274816eb8bff. 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/GXB722300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9f4e247e7ae20c6298db700e120f0e7a32936f7b592b15d6fabcf588cbfa4b. 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/GXB722300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9dbd075d8d065c9aa75b769029ea7d7d0c147f314203a05211b3b1e37db5d3. 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/GXB722300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacbc7e8bbdfee6d8dfce494b401b5394c55998cd9a2b7c539d5274816eb8bff. 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/GXB722300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd381d0dc45cf166f87ac17718d365a797923158afdf9227c3a8a158e4f00ab86. 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/QZFZ22390571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac0a246dd5309775c323ec013a2bef64124f5f17a72b0f69134e8b4b58587ef. 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/QZNWY2274146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89443cf326694b8beb03017ceb648139642ded57ea1d87b7dbb8ddc4a152d3d6. 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/QZFZ52051635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47e534b82fee15be7952628f808c65297dd6cc72df85149184b67da0ff65ac4. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/QZFZ42089346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8842a347235581ef905dd0575691642202a080cd59d27957aa5eb9a6bda0b6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ22076239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05a53c6cc739401c466adfa3bf8184c824e7243b34582afe5f514c7c6310f2d. 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/QM2PV1584502.