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 0x3ecb158ccefe58d7ea33ffed92f842d8fae5d3f51070c60c45338be320829a85. 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/fb392bb4-83e9-405b-ba2f-5d15ff403a7a.json and https://artists.proofprofile.net/proofs/artist/fb392bb4-83e9-405b-ba2f-5d15ff403a7a.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 0xc112552342aa6c16017a74eec3bf84e71bb0a493ec5a31fa1193c38a207701c4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZNWW2173876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54d2da8f5632ccea64e74d6e0fb41c3365e431b5ef00444ca7935385e2d463e. 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/QZNWW2178922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf336e1525e76a5ead0c88ccb4f9fd55e517f9627a1b5dca9d7f0f5b104db5c. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZNWW2178921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12036ac8c72790c5e34df6dd9aebe825fe73438ed7bfcce305fd621b25f62148. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWW2178906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa948e090a20f8b38e4aaa843edf652f006fb72fd2d335e96d96b3850e9425d5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:49:10Z), 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/QZNWY2175734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d093e45f2a870c036c51d58ecbbae21ebbed8c67ca41c858180a963ae0e86f1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNWY2174280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90e0b353ce99105ff587f484211034e102a5a851f94febe24cbe231ad42695f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWY2175736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb629de395384eaa50457b1080ed37069d7b02e410f5f8c52071c8b1d96da1c. 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/QZNWY2170841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c896a070b5bbeb4f1eda44688325fef055411ee608fa3a5fd7b3d693610de77. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:53:00Z), 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/QZTAU2163691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a74ac270b9aa5eb8dc6ab6434af3fa51cfaefc95be2f9ac82de7c43791c34b. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZTAU2163838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25183c9a9352e185e85e042fa3e54c66e8d025367dabc617b80b48750e09c44. 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/QZFYX2228184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4cd010f10f4996f08175b41058086666684f6fd4ababe9a967e0a29731b736. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:38:26Z), 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/QZFYX2228186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965d08332ac5ef10c369393e2ba838a78adef019de7767a3e0c332ed1a1d0016. 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/QZFYX2227945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d354bdfb75c1794fbc185b3d2314e84256b44ca6f5046faae8430c8d36c523. 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/QZFYZ2202689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a52a4033ade09bd1cc838e864702cfaea99a0c8124d1ae8d47e59d0175155f6. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFYZ2202687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7289f3ebe7cfbd0ee4d4d295771dd84589886e8d0ca31851f00c07b861d8b955. 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/QZFYX2228188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8560f9f13b387924141c6380aa22402c40145bc960505736c617592bf6d64a6. 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/QZFYZ2200560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb8aa9311d901ed593ec69c6cd0730658b1639f9b55ffd26959a001abc79b73. 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/QZFYX2228187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce935480da6ed7e77a36af2cd08f698f829476779c2603bc365cc25bab5bafe8. 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/QZFYZ2200559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a9b3cc1ce9357a2dd4757389c5945ec32e9da8c1c88722d46add83cdf8f982. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFYY2298655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062ff0e397108265393b384bd850bce93adffbe2bbdab4585088ac439d72226a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:57:47Z), 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/QZFYZ2216928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5257eb889cb874e32197dbfd7f7999f9cf86d2a51f9ee8735ded107a28a0dc65. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:41:04Z), 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/QZFYZ2216929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f840205d7cd94e0764672588dd8c5363355e79d5f6b8e58885accff787636c6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:12Z), 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/QZFYZ2216751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8125b6f9cf986e0871d4860007e66f5317a1a060e223462cf77ad7ff9a4490e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ22216968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6108e6b6b613e060168762d2c27ab7291600fe2ef1c506c6e69b24563cd3a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ22258776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d58d1a51dfa6fd83f08a6738a9f1bc9fb1857d63320235b7ed34a28d666394d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA72216237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c00c9b59bbbe5afac15de92b38deafc3d9bf9f8e432265b4702a4230917cd3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES92223710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cac2628c35fd1425a82908248e88fd631d53e0672513e1cd1f859eda279b37. 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/QZES92223709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf059855155d6b1a50f3811b8e87dcb1069c418df953d494c1c5c644e6834f4. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZHN92235862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9008b36a46a8a84adeeaf74f879d0d9f4de3b5491f34a5bf23760f62c9b059. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:22:21Z), 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/QZHNA2209311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa920c63018728876e912d5abd464d5fd6128284944faf4911fe1cfd4135e22c4. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZK6L2261908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d14fafafc052d0e45813c2042d5f0e4cd01b29f011c0cef6ed2f6da98f92327. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6L2261905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d9ce276c147e71ca11cf3293a9965928ca8041bc6ec7e9f7ea578e75e3b2c7. 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/QZK6L2261746.