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 0x19b63c389afc1591ea9e72f2a4fbfcf6d68400c2438aaa4a1ceab3920930f3fa. 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/a5af6457-5ba0-48d2-beb3-efe04ff5c67b.json and https://artists.proofprofile.net/proofs/artist/a5af6457-5ba0-48d2-beb3-efe04ff5c67b.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 0xb347980b156d8b8a2d4ec05cbc1926b228a4d8dd148fc191f91f9546a87ab175. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:06:23Z), 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/QZK6H2435871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96017b1a6e4cf935db30584399f5af68f80ff201bb260bdf8963f7c4a045934. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTAX2453982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354bd546422969405b29e5f3653204a033dc3aef2d4a1ba9f63f6da059d0c7cd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBE2422159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358e7c7953d2913db914bc93cb5cda21388be29f555ae505404e4b5f5cc20091. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZWFE2427007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9051e9831dcdf414da97e600e5e8043f67b0016a2ebcf7b57c651a5c7916ad. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFX2402510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8ba689d9ab8331a1c753a0a343fc41a18f72a97ad3f3194aebc821daf597f6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7K2400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7681b3f3d69bdeb17bce1fa17fe6dc538791f531ffae61043b886b6437e94c1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7N2469001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b7f93dd7390c6858226398903b743d32b324915fbf68a3b5eec76018f825b7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ7W2499896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16d886b148bc3f52aa3aa57eadcc67dff0c2abfeda15a011f924033521d40b4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3F22407398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db6a3dcf340d1830d7265536a078fb9c71c9e577c0311a123c7b32e22c4c96f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFYZ2523948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e54ebaf77f03d08fbf681c0919224df30a98e24bdd8f84b528522b021b4930. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFYZ2523949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370921abda06b531a8eb8490a142477524ea509b8e144b1f562848b8f5850421. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ72591460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9159ab3c59632fcf990296d1cc560630215cc93748f2f0ac3cdd23776649b9dd. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:44:34Z), 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/QZDA72523731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2021601cdb5a78b8105fa57651301bfdfe6adacb16fb192ea3079989e8740a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZES82551947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fba0e1dcc21a4653a8a56a4e0644a33d621c51331450eaa03fd0b9697c99c2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:17:16Z), 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/QZHNA2568333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd1a33b88456b36771c7f5e953d1b40eb1f527580fa652443e15806973ea682. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNB2576984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4405e9902fdb47facc6680afe3e3fd20ddee0870ee7a344998029cadcba9b1e8. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZNWQ2510748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85399028ffba6caa68fd79812f8443b55ee9eda8049c722578867c484cd3e6b7. 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/QZNWU2570249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a1797986fc4e3c98ece08831bf779c4d2088bb3c726b339600bfde5607fbd6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTAU2595700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd940a152d9153a279ef1de1cdb5cd917b194dcd588e5530d2518f706781e69a5. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:22:36Z), 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/QZTAU2595701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b6c4adce623add707e45de1e86e83681675ee9907ec3d679b54e6c3ae39afd. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZTAU2595702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc71c1b6deeb861783aae7807f82d233068e81d5bff4f8b1ceda87d4d1499b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB32529503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7aa0c2a9d7c396e2ec584b9c1d985cc78c907fe900ca1e327aa456dbe95db5. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZTB52579301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61f679955c3dfbf15610d7ee9fafb34760ae32ce8cd54a46a0e7cc9c6a96525. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB72534725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97279eae66ce3310cc93976cb012cfbaed2f1002b1cd84adb5b28df3f007a15f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:40Z), 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/QZTBA2501963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30978791f985108125d2512a6e15e8ed3b8593e7454a411a57499a8c24481c9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFL2545286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf585330e501f0bfe1f0a1aa6e57cf0b75ed036e12b8933449fabf1baf00ab86e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFT2542009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e4fb3b772f76e8e7a2cf0622be634f4808e43b89ebe319bb7157fa16a10617. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ7X2561388.