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 0xe29b35528fba049989b4556c5b4e762fbf883e55811bb8ff996a12bc2c7947b9. 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/4a06460d-7870-4a71-ba28-7ae07eb316b6.json and https://artists.proofprofile.net/proofs/artist/4a06460d-7870-4a71-ba28-7ae07eb316b6.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 0x2d1d7a2da73edf4298ec1509f701b6cbf0c1ba0bdde1dfc905ef634593602683. 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/ES71G1705447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc041343af7b4d8fe0e7f78403cdca0de568c0fe071b3f45e9780065522e5810b. 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/ES71G1705449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dbe23268b1588b035eca4121e4afbe1290d010cae1a34a1834658500703d5a. 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/ES71G1776778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a05a2e21d9282ab9be103fe39deec4fc519ef3c7c3c2b7af0957babf8178fb. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ES71G1776781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1453001d6a82f7b2415c06cfafcdc34750e1aae7c3b30493370b75989bec283b. 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/ES6081142601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cc9db0fb74e60cbc2aefd936236e5284d7b7ae5bb7189b0756247c0a457a90. 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/ES6081142602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3aad0b8d97494fe7f6b330b4308603fb9bd545059fdb11c2fb857439f36cb3e. 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/ES6081142603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61357fe1eb896768b1f8d42372c8225dcc1c44bb1c84019c9f2126855ffa181. 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/ES6081142604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe861229b1709a264c42b449d6c6900c0a633e6dbee139ca691e99bf7f0c0d67. 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/ES6081142605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796ee3a5439af3c2f445429c76de7494613b9039939eeffd128e8a7b75254a24. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:55:18Z), 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/ES6081142607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abc0b7965f7af4e95b61abc12c841c56acf80c344c08d6c43252694c7057aae. 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/ES6081142609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca616d77826467ca4a54981e237a12f44add48fa2713c227a16b268e493be2b8. 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/ES6081142611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ab249ba59ccc526813fb053bec42db891e2055c36b272cf5a501da8355d9ae. 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/ES6081142612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf092353042957933e238b25cf65d8ffe60332b8715032fe47935b83b4889e4. 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/ES6081142615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb8b3b31846eef17039ddc44b7d8b4d11bd4d6c311225b9adb525e54eff30b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES6081142610.
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 0xd6725392acc5793b82ef438687ee1e25478e1d065b0f946a80beec8a162d8df5. 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/USA560919901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2f4d7e467d4988dcc3a24ba5f4402188dd7ef41473a5e88dd353b9bb79e16b. 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/USA560919902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac153466bc02acca3843ed4b259614c01ec29b5748410361a48c66261b65f5c. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/USA560919903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec4054eb039d050dd2cc964aa8ec54e04d302918f980e1afa90d37ba63abe89. 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/USA560919904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1798125e984ed66ba3723fa0e32ae2ddf210fa65ff3d7a88341376a63dff2b7. 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/USA560919907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f06e7b3d868448434e7eaf0cff1f20e7dc439ebf7ddb54bbc51de3df482cd14. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA560919908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fe02061772d937eee09f13512fbb7c9ae0c229bfc8e6f372e71bd03c976d74. 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/USA560919909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7baff6afd3d91b82e6c4618f9df634f10fa7c06933c4ff7c7202a4b3f995d2d. 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/USA560919910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae61191076288266a82df844ded63d12b3ce9660f63ec46f682cfad90512820. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA560919911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4087d344aa5dbfada829c0d68f70e81489b079b58eadfa18160a226a3d15ea. 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/USA560919913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fbad670f6bc56882d3e8812720de28d8cf9cc0a640fc6f6da0f36f9c61adca. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USA560919905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c789412a251bde95003cfd9e3f52dc0aaaa08d6510d94e56ff827db0aeb08f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA560919906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a1fe8121656dc166459e886b2ad076d393ab52da64678541c67e897c4a924e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA560919912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc006606d6e38723d8ee2cd7d5b2b313ff5259448b4eb5b5c1883f997b16d99fe. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA560919914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa720af1ede333e78d931182736f59047f9918d558919d39e4779cea3c778710e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA560919915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940dec4be52cb243dd4bab3b8ba9eafe1737d7d309ac5f1413087ba9fc1ffda7. 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/ESA092224701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54bca99d870dd5745fd533429c01195e052d4e6f51dbea113510302dcd4019. 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/ESA011564663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe724ae9d173cc64e61d20d972809fe6401f824c50fee16477f993c4d60c97ffa. 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/ES71G2339239.