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 0x0d77aad31bb411a3d60206c7c6da56b97bae75382553957fcd81bc0f71fda19f. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9c77fc1-7b97-435d-b6e3-994784c8cbd2.json and https://artists.proofprofile.net/proofs/artist/e9c77fc1-7b97-435d-b6e3-994784c8cbd2.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 0x660d7d01be52153f32bde1eb6a8010e55d499fcb0c646d6c097c9b995ffe15e7. 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/UST8K1841087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396a37b99811004fd9a31507aea51e08bc5fede964da4f004c9e0ee474bb3b29. 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/UST8K1841089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4b5a708ba5823877cadc642de0d5d6a4d6ef3a4ffe815b47f25b7eae440e0c. 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/UST8K1841090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10a2c50482fe6d5a084f7cab72613bba26bdaa8c0cac707cd75906763ef6913. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UST8K1841084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0713a5a1a812ee2684f388a8d20c43b035b28d3cfa32b6c1a89a78b98208184. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/UST8K1841085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee829500f95b691c1f607f12d4034110c2089ca633cffecfe82d101ff70fe4d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UST8K1841088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491c0d53a6ed9bbba184ef636499a08fb61790d81419088920b8efa2e86ea7eb. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/UST8K1841092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd562cf15640b748429168ecca2af211bbb5a6c2507eb9596c51908221eb027e6. 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/QZTAW2335925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71483cc43dc27e2066764e2606f11574dc0dd2db2561f7559ab2b6082137713. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZTAW2335924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbc46d1847d2647da131cc2ea3dcd58ec7520e5f9318485a733438594289556. 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/QZNWX2263338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d4a098208b1c573238e84976954465422ce0e475f0fcc64cf6f9896247a861. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZNWX2263333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543e82c040c56d06cf20774b6dacf42e0dba5b6286dcab7759e8dc5ddba5cd94. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWX2263334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8153e9b469d76e354cccce3cd9ea0427867747ec6900decbe8a29d092fff2e. 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/QZNWX2263335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b9d96af54127eb074ec863c04789addb10071434cba76745cc129c081a0e7b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNWX2263336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cd098b5b7bd5c78b4589733f52341e29f0cbd336c9f1ef7cf1087e8d50e33b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZNWX2263337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3869307cbffc2c1ced9a881132b4023c094d5b6775b940af3ce12081272202. 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/QM4DW1848284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8a41212a078e7384f1ada486025bbd59717e1a38691a45892a06c5bf8f4117. 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/QM4DW1848285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c0a1a646c5eef63baa23a8399d1448bd7712cc47661fa2d5fa16da6eaa0861. 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/QM4DW1848286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e6799d54c550ff222c81399769fc14bd90d86a4d0df99c6797ade8ba5abd04. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4DW1848283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb199af9dfaeb5eebba120af60901aff5258d60c2a766357b07c95580d5f540ed. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4DW1848287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd74b7e3d54c98352c35feae603a78d91b61d6c42f0bfb6fda10233a7da7a73. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QM4DW1848288.